Post on 28-Mar-2015
2012 International Energy Conservation Code Update with Maryland Amendments
Based on the 2012 International Energy Conservation Code ®, (IECC ®)
Maryland Code Administration
Description
This seminar introduces participants to the major
changes from the 2009 IECC to the 2012 IECC
with an emphasis on the increase in energy
efficiency improvements. Participants will
discuss the changes and reasons for the
changes. Information presented will allow
participants to apply these new code
requirements to design, plan review, and/or
inspection. 2012 IBC Update 2Handout page 1
Marginal Markings within the codebook
Solid vertical lines indicate a technical change
from the requirements of the 2009 edition.
Arrows indicate where a section, paragraph,
item in a list, exception or table has been deleted.
A single asterisk [*] indicates that text or a table
has been relocated elsewhere in the code.
A double asterisk [**] indicates that the section
or table immediately following has been relocated
here from a different section.
2012 IECC Update 3
***
The new Code Development Process
Highlights of the plan include:
Maintains 3-year publication cycle
Maintains the ICC Governmental Consensus Process
Divides the codes into two groupings for purposes of Code Development
and Final Action Hearings – one group heard each year.
An unveiling of all the new codes at the Annual Conference in the third year
Holding Code Development Hearings at the same central location every
April/May
Holding all Final Action Hearings at the Annual Conference at locations
which will continue to rotate through the four quadrants of the U.S. in late
October/early November.
2012 IECC Update 4
Letter Designations in Front of Section Numbers
The two groups of codes and deadlines for proposals are: Group A Codes –
IBC, IFGC, IMC, IPC, IPSDC Proposals due January 3, 2012
Group B Codes – Admin, IEBC, IECC, IFC, IGCC, IPerfC, IPoolC, IPMC, IRC,
IWUIC, IZC. Proposals due January 3, 2013
Each grouping having Code Development and Final Action Hearings occurring in the spring and fall of the same year during the first two years of the publication cycle
2012 IECC Update 5
Letter Designations in Front of IECC Section Numbers
The content of sections that begin with a letter designation is maintained by another code development committee:
2012 IECC Update 6
[CE] = Commercial Energy Code Development Committee
[M] = Mechanical
[RE] = Energy Code Development Committee
Maryland Provisions
Three Part Process
2012 IBC Update 7
Annotated Code of
Maryland
COMAR05.02.07
Local Adoption,Implementation
and Enforcement
Annotated Code of Maryland
Enabling legislation that creates the framework for the Maryland Building Performance Standards. Public Safety Article TITLE 12. BUILDING AND MATERIAL CODES; OTHER
SAFETY PROVISIONS SUBTITLE 5. MARYLAND BUILDING PERFORMANCE
STANDARDS
2012 IBC Update 9
Duties of the Maryland Codes Administration (COMAR)
Must adopt as part of the Standard (MBPS) the IBC, the IRC and the IECC within 12 months of the issuance by ICC.
Amendments to the IBC and IRC may not be more stringent than the provisions found in those documents.
Amendments to the IECC must not lessen any of the IECC requirements.
2012 IBC Update 10
Local Jurisdiction Amendments
Local Amendments must not prohibit the minimum implementation and enforcement set forth in §12-505 Review and accept plans Issuance of building permits Inspection of the work authorized by building
permit Issuance of appropriate occupancy
certificates
2012 IBC Update 11
Local Jurisdiction Amendments
Local Amendments must not prohibit the minimum implementation and enforcement set forth in §12-505 Review and accept plans Issuance of building permits Inspection of the work authorized by building permit Issuance of appropriate occupancy certificates
Weaken energy conservation and efficiency provisions of the Standards
2012 IBC Update 12
Local jurisdictions SHALL implement and enforce the most current version of the standards and any local amendments
Local Jurisdiction Implementation and Enforcement
2012 IBC Update 13
No later than 6 months after adoption by the State.
Key Maryland Dates
COMAR adoption of the 2012 IBC: January 1, 2012
Local implementation and Enforcement: July 1, 2012
Local amendments to Maryland Codes Administrations: 15 days prior to local effective date Or 5 days after emergency local adoption
2012 IBC Update 14
COMAR 05.02.07.03 B. Terms.
New term “High performance home” has the meaning stated in Public Safety Article, §12-509(a), Annotated Code of Maryland
§ 12-509. Encouragement of high-performance homes
(a) "High-performance home" defined. -- In this section, "high-performance home" means a new residential structure that meets or exceeds the current version of:
(1) the Silver rating of the International Code Council's 700 National Green Building Standards; or
(2) the Silver rating of the U.S. Green Building Council's LEED (Leadership in Energy and Environmental Design) for Homes Rating System.
2012 IBC Update 15
2012 IECC COMAR Modifications
Modifications to the 2012 International Energy Conservation Code. Add a note to Section C101, Scope and General Requirements: Additional requirements concerning energy conservation for buildings and structures may be required by the Energy Conservation Building Standards, Public Utilities Article, §§7-401 – 7-408, Annotated Code of Maryland, as amended.
2012 IBC Update 16
COMAR 05.02.07.04 E
New Section added as follows:
E. The Department encourages:
(1) Home builders to construct new high performance homes; and
(2) Local jurisdictions to amend these standards to allow builders to construct high performance homes.
2012 IBC Update 17
COMAR Modifications to the IBC and IRC
Additional modifications are made as part of the Maryland Building Performance Standards to the IBC and the IRC. Those modifications are part of the Update Classes for the IBC and IRC are being offered by the Maryland Codes Administration through the International Code Council.
2012 IBC Update with Maryland Amendments 18
Compliance Process
19
Must the project comply with the IECC?
Mandatory Provisions
Air Leakage and
Building SystemsPerformance PathPrescriptive Path
Building Thermal Envelope and Electrical
Simulated Performance Alternative
R-value Computation
UA Alternative Total UA Alternative
Document Compliance with IECC
Field Inspection
Plan Review
Handout page 6
IECC Plan Review1. Determine IECC mandatory provisions for air leakage
and building systems are met.
2. Determine if either the prescriptive path or simulated performance path is used.
3. Determine IECC prescriptive provisions are met for the building thermal envelope and electrical.
4. Determine if either the R-value computation, UA alternative or Total UA alternative is used.
1. Determine IECC provisions for R-value computation are met.
2. Determine IECC provisions for UA alternative are met.
3. Determine IECC provisions for Total UA alternative are met.
5. Determine if the provisions for the simulated performance alternative are met.
6. Document compliance for field inspection staff.
2012 IBC Update with Maryland Amendments 20
2012 IECC Update 21
Field Inspection
Foundation Inspection
Rough Inspection
Final Inspection
ComplianceNoncompliance
Certificate of Occupancy
Rei
nspe
ctio
n
• Exterior Insulation Inspection• Structural Insulated Panel
Foundation Inspection• Insulated Concrete Forming
Systems Inspection• Pre-cast Insulated Concrete
System Inspection• Crawl space Wall Inspection
ComplianceNoncompliance
Rei
nspe
ctio
n
• Air Barrier Inspection• Sealing Inspection• Fenestration Inspection• Insulation Inspection• Mechanical Inspection• Concealed Service Water
Heating System Inspection
ComplianceNoncompliance
Rei
nspe
ctio
n
• Insulation –Inspections (4)• Mechanical – Inspections (5)• Service Water Heating
Inspections (3)• Snow Melt Controls Inspection• Swimming Pool Inspections (3)• Certificate Inspection
2012 IBC Update with Maryland Amendments 21
IECC Inspection
1. Determine compliance method used for project.
2. Field inspections will normally occur at the following stages;1. Foundation/Slab inspection
2. Rough Inspection
3. Final Inspection
3. Verify during the required inspections that the project complies with the prescriptive or performance provisions as determined during the Plan Review
2012 IBC Update with Maryland Amendments 22
IECC Inspection
5. Verify compliance with mandatory provisions of the code;
2012 IBC Update with Maryland Amendments 23
1. Air Leakage2. HVAC System Controls3. Duct Sealing4. Mechanical System Piping5. Circulating Hot Water Systems.6. Mechanical Ventilation, equipment
sizing7. Swimming pool heating, time
switches and covers.8. Lighting Equipment
6. Verify third party inspection for sealing of Building Thermal Envelope and Duct tightness are within code specified limits.• (Duct Tightness testing not required when ducts and air handlers are
entirely within the building thermal envelope.)
IECC Inspection
5. Verify compliance with mandatory provisions of the code;
6. Verify third party inspection for sealing of Building Thermal Envelope and Duct tightness are within code specified limits.• (Duct Tightness testing not required when ducts and air handlers
are entirely within the building thermal envelope.)
2012 IBC Update with Maryland Amendments 24
1. Air Leakage2. HVAC System Controls3. Duct Sealing4. Mechanical System Piping5. Circulating Hot Water Systems.6. Mechanical Ventilation,
equipment sizing
7. Swimming pool heating, time switches and covers.
8. Lighting Equipment
Arrangement and format of the 2012 IECC
The IECC contains two separate sets of provisions. The IECC—Residential Provisions apply to detached
one- and two-family dwellings and multiple single family dwellings as well as Group R-2, R-3 and R-4 buildings three stories or less in height.
The IECC—Commercial Provisions apply to all buildings that are not included in the definition of “Residential buildings”.
2012 IECC Update 25Handout page 2
Arrangement and format of the 2012 IECC
IECC—Commercial Provisions, therefore, contain provisions for residential buildings four stories or greater in height.
2012 IECC Update 26Handout page 2
Arrangement and format of the 2012 IECC
Each set of provisions is independent; containing a chapter in: Scope and Administration, Definitions, General Requirements and Energy Efficiency Requirements applicable to
buildings within its scope.
2012 IECC Update 27Handout page 2
Table of Contents
2012 IECC Update 28Handout page 2
Scope and Administration Chapter 1
2012 IECC Update 29
Chapter 1 Scope and Administration
Changes Identical for both Commercial and Residential
2012 IECC Update 30
Chapter 1 Scope and AdministrationChapter 1: Scope and AdministrationCode Section Sectio
n TitleDescription of Change
2012 2009C-101.2
R-101.2
101.2 Scope Added building site and associated systems and equipment
C-101.3
R-101.3
101.3 Intent Added that the regulation of the code will conserve energy over useful life of the each building.
C106 R106 106.1 Referenced Standards
Added information on conflicts and provisions in referenced codes and standards
2012 IECC Update 31Handout page 3
Chapter 1 Scope and Administration
1. What will conserve energy over the useful life of each building?
Constructing and using the mechanical systems, service water-heating systems, and electric power and lighting systems
located on the building and on the building site in accordance with this code.
2012 IECC Update 32Handout page 2\3
DefinitionsChapter 2
2012 IECC Update 33
Chapter 2 Definitions
NEW for Commercial Buildings Building commissioning A process that verifies and documents that
the selected building systems have been designed, installed and function according to the owner’s project requirements and construction.
2012 IECC Update 34Handout page 3
Chapter 2 Definitions
NEW for Commercial Buildings
Building entrance Any door, set of doors,
doorway or other form of portal that is used to gain access to the building from outside by the public.
2012 IECC Update 35Handout page 3
Chapter 2 Definitions
NEW for Commercial/Residential Building site A contiguous area of land that is under the
ownership or control of one entity.
2012 IECC Update 36Handout page 3
Chapter 2 Definitions
NEW for Commercial Buildings Coefficient of performance (COP)—
Cooling The ratio of the rate of heat removal to the
rate of energy input, in consistent units, for a complete refrigerating system or some specific portion of that system under designated operating conditions.
2012 IECC Update 37Handout page 3
Chapter 2 Definitions
NEW for Commercial Buildings Coefficient of performance (COP)—
Heating The ratio of the rate of heat removal to the rate
of heat delivered to the rate of energy input, in consistent units, for a complete heat pump system, including the compressor and, if applicable, auxiliary heat, under designated operating conditions.
2012 IECC Update 38Handout page 3
Chapter 2 Definitions
NEW for Commercial/Residential Continuous air barrier
A combination of materials and assemblies that restrict or prevent the passage of air through the building thermal envelope.
2012 IECC Update 39Handout page 3
Chapter 2 Definitions
NEW for Commercial/Residential Demand recirculation water system A water distribution system where pump(s)
prime the service hot water piping with heated water upon demand for hot water.
2012 IECC Update 40Handout page 3
Chapter 2 Definitions
NEW for Commercial
Dynamic glazing
Any fenestration product that has the fully reversible ability to change its performance properties, including U-factor, solar heat gain coefficient (SHGC), or VT.
2012 IECC Update 41Handout page 3
Chapter 2 Definitions
NEW for Commercial Enclosed space A volume surrounded by solid surfaces,
such as walls, floors, roofs and openable devices, such as doors and operable windows.
2012 IECC Update 42Handout page 3
Chapter 2 Definitions
NEW for Commercial Equipment room A space that contains
electrical equipment, mechanical equipment, machinery, water pumps or hydraulic pumps that are a function of the building’s services.
2012 IECC Update 43Handout page 3
Chapter 2 Definitions
NEW for Commercial Fenestration product, field fabricated A fenestration product whose frame is made at the
construction site of standard dimensional lumber or other materials that were not previously cut, or otherwise formed with the specific intention of being used to fabricate a fenestration product or exterior door. Field fabricated does not include site-built fenestration.
2012 IECC Update 44Handout page 4
Chapter 2 Definitions
NEW for Commercial/Residential Fenestration product, site-built
A fenestration designed to be made up of field-glazed or field-assembled units using specific factory cut or otherwise factory formed framing and glazing units. Examples of site-built fenestration include storefront systems, curtain walls, and atrium roof systems.
2012 IECC Update 45Handout page 4
Chapter 2 Definitions
NEW for Commercial Furnace electricity ratio The ratio of furnace electricity use to total
furnace energy computed as ratio = (3.412 × EAE)/1000 × Ef+ 3.412 × EAE) EAE (average annual auxiliary electrical consumption)
Ef (average annual fuel energy consumption)
Ef is expressed in millions of Btu’s per year.
2012 IECC Update 46Handout page 4
Chapter 2 Definitions
NEW for Commercial General lighting Lighting that provides a substantially
uniform level of illumination throughout an area. General lighting shall not include decorative lighting or lighting that provides a dissimilar level of illumination to serve a specialized application or feature within such area.
2012 IECC Update 47Handout page 4
Chapter 2 Definitions
NEW for Commercial Integrated part load value (IPLV) A single-number figure of merit based on
part-load energy efficiency ratio (EER), COP, or kW per ton expressing part-load efficiency for airconditioning and heat pump equipment on the basis of weighted operation at various load capacities for equipment.
2012 IECC Update 48Handout page 4
Chapter 2 Definitions
NEW for Commercial Nonstandard part load value (NPLV) A single-number part-load efficiency figure
of merit calculated and referenced to conditions other than IPLV conditions, for units that are not designed to operate at ARI standard rating conditions.
2012 IECC Update 49Handout page 4
Chapter 2 Definitions
NEW for Commercial On-site renewable energy
Energy derived from solar radiation, wind, waves, tides, landfill gas, biomass, or the internal heat of the earth. The energy system providing on-site renewable energy shall be located on the project site.
2012 IECC Update 50
Chapter 2 Definitions
NEW for Commercial/Residential Visible Transmittance (VT)
The ratio of visible light entering the space through the fenestration product assembly to the incident visible light. VT includes the effects of glazing material and frame and is expressed as a number between 0 and 1
2012 IECC Update 51Handout page 4
Chapter 2 Definitions
NEW for Residential Whole House Mechanical
Ventilation System
An exhaust system, supply system, or combination thereof that is designed to mechanically exchange indoor air with outdoor air when operating continuously or through a programmed intermittent schedule to satisfy the whole house ventilation rates
2012 IECC Update 52Handout page 4
Chapter 2 Definitions
REVISED for Commercial/Residential
Building Any mechanical systems,
service water heating systems and electric power and lighting systems located on the building site and supporting the building.
2012 IECC Update 53Handout page 4
Chapter 2 Definitions
REVISED for Commercial/Residential
Residential Building Revised to clarify that it
includes one- and two-family dwellings and multiple single family dwellings (townhouses).
2012 IECC Update 54Handout page 4
Chapter 2 Definitions
REVISED for Commercial/Residential Skylight Revised to “slope less than 60 degrees
(1.05 rad).”
2012 IECC Update 55Handout page 4
Chapter 2 Definitions
2. What is the difference between building and building site?
A building is any structure used or intended for supporting or sheltering any use or occupancy,
including any mechanical systems, service water-heating systems, and electric power and
lighting systems located on the building site and supporting the building. A building site is a
contiguous area of land that is under the ownership or control of one entity.
2012 IECC Update 56Handout page 5
Chapter 2 Definitions
3. What is a whole-house mechanical ventilation system?
Whole-house mechanical ventilation system is an exhaust system, supply system or combination
thereof that is designed to mechanically exchange indoor air with outdoor air when
operating continuously or through a programmed intermittent schedule to satisfy the
whole-house ventilation rates.
2012 IECC Update 57Handout page 5
Chapter 2 Definitions
4. What is a continuous air barrier?
A combination of materials and assemblies that restrict or prevent the passage of air through the building thermal envelope.
2012 IECC Update 58Handout page 5
General Regulations Chapter 3
2012 IECC Update 59
Chapter 3 General Requirements
REVISED for Commercial/Residential Materials, Systems and Equipment Revised to give three options.
1. ANSI/ASHRAE/IESNA 90.1;
2. The requirements of Sections C402 through C405;
3. The requirements of Sections C402.4, C403.2, C404, C405.4, C405.6 and C405.7.
2012 IECC Update 60Handout page 5
Chapter 3 General Requirements
REVISED for Commercial/Residential C303.1.3/R303.1.3
Fenestration product rating:
“Label or Table”
2012 IECC Update 61Handout page 5
Chapter 3 General Requirements
Label or Table Solutions National Fenestration Rating Council
Component Modeling Approach (CMA) for site-built commercial windows.
Field Labeling available for missing labels.
2012 IECC Update 62Handout page 5
Chapter 3 General Requirements
REVISED for Commercial/Residential C303.1.3/R303.1.3 Fenestration product rating Tables C303.1.3(3)& R303.1.3(3) Default Glazed
Fenestration
Include visible transmittance (VT)
2012 IECC Update 63Handout page 5-6
Chapter 3General Regulations
5. What is the importance of VT values?
Visible transmittance (VT) indicates the effects of glazing material and frame.
2012 IECC Update 64Handout page 6
Chapter 3General Regulations
6. What is the VT value for a double glazed, tinted window?
Visible transmittance (VT) for a double glazed, tinted window is 0.3
2012 IECC Update 65Handout page 6
Commercial Energy EfficiencyChapter 4
2012 IECC Update 66
Section C401 General
REVISED The section has been
revised for clarity. Compliance with ANSI/ASHRAE/IESNA 90.1 is still an acceptable alternative.
2012 IECC Update 67Handout page 6
Section C402 Building Envelope Requirements REVISED Building envelope
performance are more stringent. For example:1. Roof solar reflectance
and thermal emittance.
2. Insulation performance is improved.
3. Fenestration performance allows more flexibility.
4. Air leakage requirements expanded.
2012 IECC Update 68Handout page 6
Table R402.1.1 Insulation & fenestration requirements by component
REVISED Fenestration and skylight U-factors are improved. Ceiling insulation R-values increase:
R-30 to R-38 in Climate Zones 2 and 3, and R-38 to R-49 in Climate Zones 4 and 5.
Wall insulation R-values increase from R-13 to R-20 or R-13 + 5 in Climate Zones 3 and 4.
Note h clarified regarding continuous isolation. Add SHGC 0.40 requirement for windows in Climate
Zone 4.
2012 IECC Update 69Handout page 17
Table R402.1.1 Insulation & fenestration requirements by component
2012 IECC Update 70Handout page 17
Maryland Climate Zones 4 and 5
Table R402.1.1 Insulation & fenestration requirements by component
Note h. First value is cavity insulation, second is continuous insulation or insulated siding, so “13+5” means R-13 cavity insulation plus R-5 continuous insulation or insulated siding.
If structural sheathing covers 40 percent or less of the exterior, continuous insulation R-value shall be permitted to be reduced by no more than R-3 in the locations where structural sheathing is used – to maintain a consistent total sheathing thickness.
2012 IECC Update 71Handout page 17
2012 IECC Update 72
Table R402.1.1 Insulation & fenestration requirements by component
Table R402.1.3 Equivalent U-Factors
REVISED Data and footnotes changed.
2012 IECC Update 73Handout page 17
2012 IECC Update 74
Table R402.1.3 Equivalent U-Factors
R402.1.4 Total UA alternative.
If the total building thermal envelope UA (sum of U-factor times assembly area) is less than or equal to the total UA resulting from using the U-factors in Table R402.1.3 (multiplied by the same assembly area as in the proposed building), the building shall be considered in compliance with Table R402.1.1.
The UA calculation shall be done using a method consistent with the ASHRAE Handbook of Fundamentals and shall include the thermal bridging effects of framing materials.
The SHGC requirements shall be met in addition to UA compliance.
2012 IECC Update 75
Table C402.2.1.1
2012 IECC Update 76Handout page 6
NEW
C402.2.6 Slabs on grade
REVISED Added exception that where the slab-on-
grade floor is greater than 24 inches (61 mm) below the finished exterior grade, perimeter insulation is not required.
2012 IECC Update 77Handout page 6
C402.2.8 Insulation of radiant heating systems
NEW Radiant heating
design information added and the bottom surfaces of floor structures incorporating radiant heating shall be insulated.
2012 IECC Update 78Handout page 6
C402.3.1 Maximum area
REVISED Excludes opaque spandrel panels also in
vertical fenestration areas, which shall not exceed 30 percent of the above-grade wall area. The skylight area shall not exceed 3 percent of the gross roof area.
2012 IECC Update 79Handout page 6
C402.3.1.1 Increased vertical fenestration area with daylighting controls
NEW In Climate Zones 1 through 6, a maximum
of 40 percent of the gross above-grade wall area shall be permitted, provided three items are adhered to and added exception.
2012 IECC Update 80Handout page 7
C402.3.1.2 Increased skylight area with daylighting controls
NEW Skylight area increased from 3 to 5
percent with automatic daylighting controls.
2012 IECC Update 81Handout page 7
Section C402.3.2 Minimum skylight fenestration area NEW Certain spaces greater
than 10,000 square feet (1393 m2) and with ceiling heights greater than 15 feet (4572 mm) are required to provide a total daylight zone under skylights of not less than half the floor area.
2012 IECC Update 82Handout page 7
C402.3.2.1 Lighting controls in daylight zones under skylights
NEW Lighting in the daylight zone shall be
controlled by multilevel lighting controls with exception.
2012 IECC Update 83Handout page 7
Table C402.3.3.1 SHGC Adjustment Multipliers
NEW Table of SHGC adjustment multipliers
2012 IECC Update 84Handout page 7
C402.3.3.2 Increased vertical fenestration SHGC
NEW In Climate Zones 1 through 3, vertical
fenestration entirely located not less than 6 feet (1729 mm) above the finished floor shall be permitted a maximum of SHGC of 0.40.
2012 IECC Update 85Handout page 7
C402.3.3.3 Increased skylight SHGC
NEW In Climate Zones 1
through 6 skylights shall be permitted a maximum SHGC of 0.60 where located above daylight zones provided with automated daylighting controls.
2012 IECC Update 86Handout page 7
C402.3.3.4 Increased skylight U-factor
NEW Where skylights are installed above
daylight zones provided with automatic daylighting controls, a maximum U-factor of 0.9 shall be permitted in Climate Zones 1 through 3, and a maximum U-factor of 0.75 shall be permitted in Climate Zones 4 through 8.
2012 IECC Update 87Handout page 7
C402.3.3.5 Dynamic glazing
NEW Dynamic glazing requirements. Dynamic glazing shall be considered separately
from other fenestration, and area-weighted averaging with other fenestration that is not dynamic glazing shall not be permitted.
2012 IECC Update 88Handout page 7
C402.3.4 Area-weighted U-factor
NEW Area weighted U-factor is permitted to
satisfy the U-factor requirements for commercial buildings.
2012 IECC Update 89Handout page 7
C402.4.1 Air barriers
NEW A continuous air
barrier shall be provided throughout the building thermal envelope with exception in Climate Zones 1, 2 and 3.
2012 IECC Update 90Handout page 7
C402.4.1.1 Air barrier construction
NEW Construction details of air barriers with
exception.
2012 IECC Update 91Handout page 7
Section C402.4.1.2 Air barrier compliance options
NEW Three options-choose from one or all:
Materials Assemblies Building Test
2012 IECC Update 92Handout page 7
Section C402.4.1.2.1 Materials (Option)NEW
Materials deemed to comply if installed properly:
3/8-inch (10 mm) plywood.
3/8-inch (10 mm) OSB. ½-inch (12 mm)
Extruded polystyrene. ½-inch (12 mm) Foil
backed polyisocyanurate.
1 ½-inch (36 mm) Closed cell spray foam.
4 ½-inches (113 mm) Open cell spray foam
½-inch (12 mm) Gypsum board.
½-inch (12 mm) Cement board.
2012 IECC Update 93Handout page 8
Section C402.4.1.2.1 Materials (Option)NEW
Materials deemed to comply if installed properly:
Built up roofing. Modified bitumen
roofing. Fully adhered single
ply roofing. 5/8- inch (16 mm)
Portland sand parge or gypsum plaster.
Cast in place or precast concrete.
Fully grouted block masonry.
Sheet steel or aluminum.
2012 IECC Update 94Handout page 8
Section C402.4.1.2.2 Assemblies (Option)
NEW Presumptive compliance if installed
properly: Sealed concrete masonry wall units (CMU) or ½-inch (12 mm) parge, stucco or plaster
2012 IECC Update 95Handout page 8
Section C402.4.1.2.3 Building test (Option)
NEW Building air leakage
rate cannot exceed 0.40 cfm/ft2 at 0.3 inches water gauge (0.2 L/s · m2 at 75 Pa) in accordance with ASTM E 779.
2012 IECC Update 96Handout page 8
Section C402.4.3 Air leakage of fenestration
REVISED Fenestration
assemblies are required to be NFRC tested and labeled unless: Field Fabricated (note
definition) or Entire Building Test
per C402.4.1.2.3
2012 IECC Update 97Handout page 8
Table C402.4.3 MAXIMUM AIR INFILTRATION RATE FOR FENESTRATION ASSEMBLIES
2012 IECC Update 98
C402.4.4 Doors and access openings to shafts, chutes, stairways, and elevator lobbies NEW Requirements for
doors and access openings from conditioned space to shafts, chutes, stairways and elevator lobbies with exception.
2012 IECC Update 99Handout page 8
C402.4.5 Air intakes, exhaust openings, stairways and shafts
REVISED Stairway enclosures and elevator shaft
vents, and other outdoor intakes and exhaust openings, integral to the building envelope shall be provided with dampers, whereas before they had to be Class I motorized dampers with maximum leakage rate.
2012 IECC Update 100Handout page 8
C402.4.5.1 Stairway and shaft vents
NEW Stairway and shaft vents shall be provided
with Class I motorized dampers with max. leakage rate.
2012 IECC Update 101Handout page 8
C402.4.5.2 Outdoor air intakes and exhausts
NEW Outdoor air supply and exhaust openings
shall be provided with Class IA motorized dampers with exceptions.
2012 IECC Update 102Handout page 8
C402.4.7 Vestibules
REVISED Requirements for vestibules have been
clarified; i.e., employee only doors are explicitly exempted.
2012 IECC Update 103Handout page 8
C403 Building Mechanical Systems
NEW Specific standards for
certain heating, ventilation and airconditioning (HVAC) system types.
2012 IECC Update 104Handout page 8
C403.2.3.1 Water-cooled centrifugal chilling packages
NEW Maximum full load kW/ton and NPLV
ratings adjusted using equations was an exception in 2009 IECC.
2012 IECC Update 105Handout page 8
C403.2.3.2 Positive displacement (air and water-cooled chilling packages)
NEW Positive displacement chilling packages
were not covered by the 2009 IECC.
2012 IECC Update 106Handout page 8
Table C403.2.3(8) Heat Rejection Equipment
NEW
2012 IECC Update 107Handout page 8
Table C403.2.3(9)Heat Transfer Equipment
NEW New table of liquid-to-liquid heat exchangers not
requiring a minimum efficiency, listing test procedure with footnote.
EQUIPMENT TYPE
SUBCATEGORY MINIMUM EFFICIENCY
TEST PROCEDUREa
Liquid-to-liquid heat exchangers
Plate type NR AHRI 400
2012 IECC Update 108Handout page 8
C403.2.4.3.3 Automatic start capabilities
NEW Automatic start-control requirements.
2012 IECC Update 109Handout page 8
C403.2.5.1 Demand controlled ventilation
REVISED Changed occupant load to 25 people per
1,000 square feet (93 m2) of floor area; and changed exception requirements.
2012 IECC Update 110Handout page 8
C403.2.6 Energy recovery ventilation systems
REVISED Changed supply airflow rate and revised
exceptions from 2009 IECC.
2012 IECC Update 111Handout page 9
Table C403.2.6 Energy Recovery Equipment
NEW New table of climate zones to percent of outdoor
air for design supply fan airflow rate.
2012 IECC Update 112Handout page 9
C403.2.8 Piping insulation
REVISED Exception 3 regarding temperature range. Piping that conveys fluids that have a
design operating temperature range between 60°F (15°C) and 105°F (41°C).
2012 IECC Update 113Handout page 9
C403.2.8.1Protection of piping insulation
NEW Piping insulation requirements to protect
piping.
2012 IECC Update 114Handout page 9
C403.2.9 Mechanical systems commissioning and completion requirements NEW Mechanical systems shall be
commissioned and completed in accordance with Section C408.2.
2012 IECC Update 115Handout page 9
C403.2.10.1 Allowable fan floor horsepower
REVISED Exception: The following fan systems are
exempt from allowable fan floor horsepower requirement.1. Hospital, vivarium and laboratory systems that utilize
flow control devices on exhaust and/or return to maintain space pressure relationships.
2. Individual exhaust fans with motor nameplate horsepower of 1 hp or less.
2012 IECC Update 116Handout page 9
Table C403.2.10.1(2) Fan Power Limitation Pressure Drop Adjustment
Revised data.DEVICE ADJUSTMENT
Credits Credits
Fully ducted return and/or exhaust air systems
0.5 inch w.c. (2.15 in w.c. for laboratory and vivarium systems)
Biosafety cabinet Pressure drop of device at fan system design condition.
Energy recovery device, other than coil runaround loop
(2.2 × energy recovery effectiveness) – 0.5 inch w.c. for each airstream
Coil runaround loop 0.6 inch w.c. for each airstream
Exhaust system serving fume hoods 0.35 inch w.c.
Laboratory and vivarium exhaust systems in high-rise buildings
0.25 inch w.c./100 feet of vertical duct exceeding 75 feet
2012 IECC Update 117Handout page 9
REVISED
C403.3.1 Economizers
REVISED Economizer requirements increased.
2012 IECC Update 118Handout page 9
Table C403.3.1(1) Economizer Requirements
REVISED Climate zones’ economizer requirements
and cooling systems greater than 33,000 Btu/h (9,672 W) whereas it was 54,000 Btu/h. (15,827 W). Footnote a revised.
2012 IECC Update 119Handout page 9
Section C403.3.1.1 Air economizers
NEW Air economizers shall comply with
Sections C403.3.1.1.1 through C403.3.1.1.4. Design capacity economizer, air economizers, control signal, high-limit shutoff and relief of excess outdoor air.
2012 IECC Update 120Handout page 9
Table C403.3.1.1.3(1) High-limit Shutoff Control Options for Air Economizers
NEW Table lists climate zones and allowed
control types for air economizers.
2012 IECC Update 121Handout page 9
Table C403.3.1.1.3(2) High-limit Shutoff Control Setting for Air Economizers
NEW Table lists device type per climate zone
with required high limit noting temperature of outside air to return air; and outdoor temperatures.
2012 IECC Update 122Handout page 9
C403.4.1 Economizers
REVISED Water economizers shall comply with
Sections C403.4.1.1 through C403.4.1.4 for design capacity, maximum pressure drop, integrated economizer control and economizer heating system impact.
2012 IECC Update 123Handout page 9
C403.4.2 Variable air volume (VAV) fan control
REVISED VAV fans with 7.5-horsepower (5.6 kW)
motor requirements, whereas in 2009 IECC it was VAV fans with 10 horsepower (7.5 kW) requirements. Also, additional sections on static pressuresensor location and set points for direct digital control.
2012 IECC Update 124Handout page 9
C404 Service Water Heating
REVISED
1. Piping insulation requirement beneficial.
2. Controls to be readily accessible.
3. Pools and spas requirement revised.
2012 IECC Update 125Handout page 9
Section C404.5 Piping insulation
REVISED Added exception to allow manufacturer’s
insulation instructions for heat-traced piping systems.
2012 IECC Update 126Handout page 9
Section C 404.6 Hot water system controls
NEW Added manual operation to
circulating hot water system so that pumps or heat trace can be turned off when there is limited hot water demand. Ready access shall be provided to the operating controls.
2012 IECC Update 127Handout page 9
Section C404.7 Pools and inground permanently installed spas
REVISED Pools and in ground,
permanently installed spas shall comply with Sections C404.7.1 through C404.7.3 regarding heaters, time switches and covers.
2012 IECC Update 128Handout page 9
Section C405 Electrical Power and Lightning System
REVISED Lighting Control requirements are
expanded. Space-by-space option added.
2012 IECC Update 129Handout page 9
C405.2.1Manual lighting controls
REVISED All buildings shall include manual lighting
controls, whereas in the 2009 IECC lighting systems were provided with controls.
2012 IECC Update 130Handout page 9
C405.2.1.2 Light reduction controls
REVISED Exceptions revised.
2012 IECC Update 131Handout page 9
C405.2.2 Additional lighting controls
REVISED Added four exceptions. Additional lighting controls need not be
provided in the following spaces:1. Sleeping units.
2. Spaces where patient care is directly provided.
3. Spaces where an automatic shutoff would endanger occupant safety or security.
4. Lighting intended for continuous operation.
2012 IECC Update 132Handout page 9
C405.2.2.2 Occupancy sensors
NEW Occupancy sensors requirements.
2012 IECC Update 133Handout page 10
C405.2.2.3 Daylight zone control
REVISED Each daylight control zone shall not
exceed 2,500 square feet (232 m2). Manual daylighting controls, automatic daylighting controls and multilevel lighting controls added.
2012 IECC Update 134Handout page 10
C405.2.3Specific application controls
NEW Specific application controls requirements.
2012 IECC Update 135Handout page 10
C405.5.2 Interior lighting power
REVISED Building area and space-by-space
methods to determine the total interior lighting power allowance.
2012 IECC Update 136Handout page 10
Tables C405.5.2(1, 2) Interior Lighting Power Allowances: Building Area Method and Space-by space Method
REVISED Tables list building areas and lighting
power densities and formulas to determine interior lighting power allowances.
2012 IECC Update 137Handout page 10
Section C406 Additional Efficiency Package Options
NEW Choose one:
1. Efficient HVAC performance
2. Efficient lighting
3. On-site renewable energy
2012 IECC Update 138Handout page 10
C406.2 Efficient HVAC performance
NEW Equipment shall meet
the minimum efficiency requirements of Tables 506.2(1) through (7).
2012 IECC Update 139Handout page 10
Tables C406.2(1, 2, 3) Equipment by Size and Minimum Efficiency
REVISED Air conditioners, heat pumps and
packaged terminal AC and heat pumps listed by size and efficiency.
2012 IECC Update 140Handout page 10
Table C406.2(4)
Warm Air Furnaces and Combination Warm Air Furnaces/Air-Conditioning Units, Warm Air Duct Furnaces and Unit Heaters, Efficiency Requirements
REVISED Table for equipment by size and their
minimum efficiencies for climate zones and test procedure required.
2012 IECC Update 141Handout page 10
2012 IECC Update 142
Table C406.2(4)
Table C406.2(5) Boilers, Efficiency Requirements
REVISED Table lists equipment by steam and hot water
rather than if boiler is gas or oil fired.
2012 IECC Update 143Handout page 10
Table C406.2(6) Chillers—Efficiency Requirements
REVISED Revised table data and footnotes.
2012 IECC Update 144Handout page 10
C406.3Efficient lighting system
NEW Whole building lighting power density
requirements.
2012 IECC Update 145Handout page 10
Table C406.3 Reduced Interior Lighting Power
NEW Table for reduced interior lighting power
density (LPD) for building area types.
2012 IECC Update 146Handout page 10
Section C406.4On-site Renewable Energy
NEW Total minimum ratings of on-site
renewable energy systems shall comply with one of the following: Provide not less than 1.75 Btu’s (1850
W) or 0.50 watt per square foot (5.4 W/m2) of conditioned floor area.
Provide not less than 3 percent of the energy used within the building for building mechanical and service water heating equipment and lighting.
2012 IECC Update 147Handout page 10
Section C408 System Commissioning
NEW Verifies that the building has been built
and is operating as designed. C408.2 Mechanical systems commissioning
and completion requirements. C408.3 Lighting system functional testing.
2012 IECC Update 148Handout page 10
Section C408.2 Mechanical systems commissioning and completion requirements
NEW Prior to passing the final mechanical
inspection, the registered design professional shall provide evidence of mechanical systems commissioning and completion.
2012 IECC Update 149Handout page 10
Section C408.2.1 Commissioning plan
NEW A commissioning plan shall be developed
by a registered design professional or approved agency.
2012 IECC Update 150Handout page 10
Section C408.2.2Systems adjusting and balancing
NEW HVAC systems adjusting and balancing
activities Air systems Hydronic systems
2012 IECC Update 151Handout page 10
Section C408.2.3 Functional performance testing
NEW C408.2.3.1 Equipment. C408.2.3.2 Controls. C408.2.3.3 Economizers.
2012 IECC Update\ 152Handout page 10-11
Section C408.2.4 Preliminary commissioning report
NEW Completed and certified by the registered
design professional or approved agency.
2012 IECC Update 153Handout page 11
Section C408.2.5Documentation requirements
NEW Provide to building owner within 90 days of
certificate of occupancy. Drawings. Manuals. System balancing report. Final commissioning report.
2012 IECC Update 154Handout page 11
C408.3 Lighting system functional testing
NEW Controls for automatic lighting systems.
2012 IECC Update 155Handout page 11
C408.3.1Functional testing
NEW Testing that will ensure that control
hardware and software are calibrated, adjusted, programmed and in proper working condition.
2012 IECC Update 156Handout page 11
Chapter 4: Commercial Energy Efficiency
7. List the roof requirements for a commercial building in this code.
2012 IECC Update 157
For commercial buildings, the roof requirements are as follows:Low-sloped roofs shall have one or more options:a. Three-year aged solar reflectance of 0.55 and
three-year aged thermal emittance of 0.75.
b. Initial solar reflectance of 0.7 and initial emittance of 0.75.
c. Three-year-aged solar reflectance index of 64.d. Initial solar reflectance index of 82.
Handout page 11
Chapter 4: Commercial Energy Efficiency
8. What is the minimum skylight fenestration area?
2012 IECC Update 158Handout page 11
The minimum skylight fenestration area (see Section C402.3.2), the total daylight zone under skylights shall be not less than half the floor area and shall provide a minimum skylight area to daylight zone under skylights of either:– Not less than 3 percent with a skylight VT of at least 0.4.– Provide a minimum skylight effective aperture of at least 1
percent determined by the equation:Skylight effective aperture = 0.85 x skylight area x skylight VT x WT (area weighted average well factor).
Chapter 4: Commercial Energy Efficiency
9. The buildings shall comply with one of the three additional energy efficiency packages listed in this code. What are the three additional energy efficiency packages?
2012 IECC Update 159Handout page 11
Buildings shall comply with one of the additional efficiency packages as follows:– C406.2 Efficient HVAC Performance.– C406.3 Efficient (whole-building) lighting
system.– C406.4 On-Site Renewable Energy
(0.5 W/ft² or 3 percent).
Chapter 4: Commercial Energy Efficiency
10.List the requirements of mechanical systems commissioning and completion in this code.
2012 IECC Update 160
Section C408.2 Mechanical systems commissioning and completion requirements. Prior to passing the final mechanical inspection, the registered design professional shall provide evidence of mechanical systems commissioning and completion in accordance with the provisions of this section. Construction document notes shall clearly indicate provisions for commissioning and completion requirements, and are permitted to refer to specifications for further requirements. Copies of all documentation shall be given to the owner and made available to the code official upon request.
Handout page 12
Chapter 4: Commercial Energy Efficiency
11.What is a functional test for an economizer? What is a functional test for control hardware and software?
2012 IECC Update 161
A functional test for an economizer is the operation of its components and its interfacing relationships in accordance with approved plans and specifications such that operation, function and maintenance serviceability is confirmed. Testing shall include all modes and sequence of operation, including under full load, part load and following emergency conditions. Functional testing for control hardware and software are calibrated, adjusted, programmed and in proper working condition in accordance with the construction documents and manufacturer’s instructions.
Handout page 12
2012 IECC Update 162
2012 IECC Update 163
2012 IECC Update 164
2012 IECC Update 165
2012 IECC Update 166
2012 IECC Update 167
2012 IECC Update 168
2012 IECC Update 169
2012 IECC Update 170
2012 IECC Update 171
2012 IECC Update 172
2012 IECC Update 173
Residential Energy EfficiencyChapter 4
2012 IECC Update 174
R401.2 Compliance
REVISED Added that projects comply with either
mandatory and with either “prescriptive” or performance approach rather than section references in the code.
For example: 401.3 Certificate (Mandatory) or 402.1 General (Prescriptive).
2012 IECC Update 175Handout page 17
R401.3 Certificate
REVISED Certificate shall be completed and posted
by builder or registered design professional.
2012 IECC Update 176Handout page 17
Section R402 Building Thermal Envelope
REVISED
1. Insulation & fenestration values improved.
2. Eave baffles.
3. Steel frame wall values added.
4. Sunrooms have been reworked.
5. Air leakage controls are required.
2012 IECC Update 177Handout page 17
Table R402.1.1 Insulation & fenestration requirements by component
REVISED Fenestration and skylight U-factors are improved. Ceiling insulation R-values increase:
R-30 to R-38 in Climate Zones 2 and 3, and R-38 to R-49 in Climate Zones 4 and 5.
Wall insulation R-values increase from R-13 to R-20 or R-13 + 5 in Climate Zones 3 and 4.
Note h clarified regarding continuous isolation. Add SHGC 0.40 requirement for windows in Climate
Zone 4.
2012 IECC Update 178Handout page 17
Table R402.1.1 Insulation & fenestration requirements by component
2012 IECC Update 179Handout page 17
Maryland Climate Zones 4 and 5
Table R402.1.1 Insulation & fenestration requirements by component
Note h. First value is cavity insulation, second is continuous insulation or insulated siding, so “13+5” means R-13 cavity insulation plus R-5 continuous insulation or insulated siding.
If structural sheathing covers 40 percent or less of the exterior, continuous insulation R-value shall be permitted to be reduced by no more than R-3 in the locations where structural sheathing is used – to maintain a consistent total sheathing thickness.
2012 IECC Update 180Handout page 17
2012 IECC Update 181
Table R402.1.1 Insulation & fenestration requirements by component
Table R402.1.3 Equivalent U-Factors
REVISED Data and footnotes changed.
2012 IECC Update 182Handout page 17
2012 IECC Update 183
Table R402.1.3 Equivalent U-Factors
R402.2 Specific insulation requirements
REVISED In addition to the requirements of Section
R402.1, insulation shall meet the specific requirements of Sections R402.2.1 through R402.2.12.
2012 IECC Update 184Handout page 17
R402.2.3 Eave baffle
NEW A baffle is required adjacent to soffit and
eave vents.
2012 IECC Update 185Handout page 17
R402.2.6 Steel-frame ceilings, walls and floors
REVISED Changed references to Sections in this
code.
2012 IECC Update 186Handout page 17
Table R402.2.6 Steel-Frame Ceiling, Wall and Floor Insulation R Values
REVISED Data for steel-
framed wall 16 inches (406 mm) on center and steel-framed wall 24 inches (610 mm) on center was added.
2012 IECC Update 187Handout page 17
R402.2.12 Sunroom insulation
REVISED Title and
requirements with exceptions.
2012 IECC Update 188Handout page 17
R402.3 Fenestration
REVISED Requirements of fenestration with
Sections R402.3.1 through R402.3.6.
2012 IECC Update 189Handout page 17
R402.3.5 Sunroom U-factor
REVISED Fenestration requirements with exception
for sunrooms. U factor values changed from 2009 IECC.
2012 IECC Update 190Handout page 17
R402.4.1 Building thermal envelope
REVISED Sealing methods and requirements
changed from 2009 IECC.
2012 IECC Update 191Handout page 18
R402.4.1.1 Installation
NEW The components of the building thermal
envelope shall be installed in accordance with the manufacturer instructions.
Where required by the code official, an approved third party must inspect all components and verify code compliance.
2012 IECC Update 192Handout page 18
R402.4.1.2 Testing
2012 IECC Update 193
REVISED
At 50 Pa: 5 Air changes per hour (ACH) Climate
Zones 1 and 2. 3 ACH in Climate Zones 3 through 8.
Handout page 18
R402.4.2 Fireplaces
REVISED New wood-burning
fireplaces shall have tight-fitting flue dampers and outdoor combustion air. Also, they must have gasketed doors as shown in Table R402.4.1.1.
2012 IECC Update 194Handout page 18
R402.4.4 Recessed lighting
REVISED No change other than
listing testing after air leakage rate for recessed luminaires.
2012 IECC Update 195Handout page 18
R403 Systems
REVISED
1. Duct sealing options expanded.
2. Tested leakage reduced to 4cfm (113.3 L/min) per 100 square feet (9.29 m2).
3. Piping insulation requirements have changed.
4. Ventilation fan efficiency.
5. Pools and inground spas.
2012 IECC Update 196Handout page 18
R403.2.2 Sealing
REVISED Eliminated building cavities used as ducts
shall be sealed. Testing requirements changed and
exceptions were added.
2012 IECC Update 197Handout page 18
R403.2.2.1 Sealed air handler
NEW Air handlers shall have a manufacturer’s
designation for an air leakage of no more than 2 percent of the design airflow rate when tested.
2012 IECC Update 198Handout page 18
R403.2.3 Building cavities
REVISED Building framing cavities shall not be used
as ducts or plenums. This differs from 2009 IECC that stated
building framing cavities shall not be used as supply ducts.
2012 IECC Update 199Handout page 18
R403.3.1Protection of piping insulation
NEW Piping insulation requirements
Exposed to weather shall be protected from damage
Adhesive tape shall not be permitted.
2012 IECC Update 200Handout page 18
R403.4 Service hot water systems
REVISED Hot water systems shall be in accordance
with Section R403.4.1, Circulating hot water systems (Mandatory), and Section R403.4.2, Hot water pipe insulation (Prescriptive).
Note, in the 2009 IECC the title of this section was Circulating hot water systems.
2012 IECC Update 201Handout page 18
R403.4.1 Circulating hot water systems
REVISED Eliminated insulating circulating service
hot water piping with Group R-2.
2012 IECC Update 202Handout page 18
R403.4.2 Hot water pipe insulation
NEW All hot water pipe,
minimum R-3. Thermal resistance for piping listed as 1 through 9 in the code.
2012 IECC Update 203Handout page 18
Table R403.4.2Maximum Run Length
NEW Maximum run length for piping 3/8 inch
(9.5 mm) to greater than 3/4 inch (19.1 mm) for all piping from the distribution manifold or the recirculation loop to a point of use.
2012 IECC Update 204Handout page 18
R403.5 Mechanical ventilation
REVISED Ventilation must meet
the International Residential Code or International Mechanical Code, or other means applicable.
2012 IECC Update 205Handout page 18
R403.5.1 Whole-house mechanical ventilation system fan efficacy
NEW Introduces “whole-house mechanical
ventilation.”
2012 IECC Update 206Handout page 18
TABLE R403.5.1 MECHANICAL VENTILATION SYSTEM FAN EFFICACY
FAN LOCATION
AIR FLOW RATE MINIMUM(CFM)
MINIMUM EFFICACY(CFM/WATT)
AIR FLOW RATE MAXIMUM(CFM)
Range hoods Any 2.8 cfm/watt Any
In-line fan Any 2.8 cfm/watt Any
Bathroom, utility room
10 1.4 cfm/watt < 90
Bathroom, utility room
90 2.8 cfm/watt Any
2012 IECC Update 207Handout page 18
Section R403.6Equipment sizing (Mandatory)
REVISED Removes reference to IRC for duct-sealing
and sizing of systems. Updated reference to heating and cooling
equipment sizing in accordance with ACCA Manual S-10, Residential Equipment
Selection. ACCA Manual J-11, Residential Load
Calculations, 8th edition.
2012 IECC Update 208Handout page 18
R403.9 Pools and in ground permanently installed spas
REVISED Heater, time switch
and cover requirements for pools and in ground, permanently installed spas.
2012 IECC Update 209Handout page 18
R404 Electrical Power and Lighting Systems
REVISED 75 percent of the total lamps shall be high
efficacy lamps. Fuel Gas Lighting
2012 IECC Update 210Handout page 18
R404.1.1 Lighting equipment
NEW Fuel gas lighting systems shall not have
continuously burning pilot lights.
2012 IECC Update 211Handout page 19
R405 Stimulated Performance Alternative
REVISED Process Is virtually unchanged-
performance is improved.
2012 IECC Update 212Handout page 19
Table R405.5.2(1) Specifications for the Standard Reference and Proposed Designs
REVISED Glazing, air exchange rate, heating systems and
cooling systems standard reference design and proposed design have been revised. For the thermal distribution systems the standard reference design was eliminated and the proposed design was revised.
Footnotes revised. Footnote c added that where required by the code official testing shall be conducted by an approved party.
2012 IECC Update 213Handout page 19
Table R405.5.2(1) Specifications for the Standard Reference and Proposed Designs
REVISED Footnote d had the leakage area and reference to
ASHRAE 119 eliminated. Instead hourly calculations as specified in the ASHRAE Handbook of Fundamentals or equivalent shall be used to determine the energy loads resulting from infiltration.
Also, footnote h was revised as follows: For a proposed design without a proposed cooling system, a heating system with a prevailing federal minimum efficiency shall be assumed for both the standard reference design and proposed design.
2012 IECC Update 214Handout page 19
R405.6.1 Minimum capabilities
REVISED Item 2—The calculation of the whole-
building sizing for the heating and cooling equipment in the standard reference design residence will be in accordance with Section R403.6.
2012 IECC Update 215Handout page 19
Chapter 4: Residential Energy Efficiency
12.What are R-values for Climate Zones 2 and 3 for the ceiling?
R-30 to R-38.
2012 IECC Update 216Handout page 22
Chapter 4: Residential Energy Efficiency
13.Explain conditioned space and how it affects residential and commercial buildings?
2012 IECC Update 217
Conditioned space is an area or room within a building being heated or cooled, containing uninsulated ducts, or with a fixed opening directly into an adjacent conditioned space. For residential buildings access doors from conditioned spaces to unconditioned spaces shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces (see Section R402.2.4). All sunrooms enclosing conditioned space shall meet the fenestration requirements of this code unless they meet exceptions (see Section R402.3.5). For commercial buildings the floor (see Section C402.2.5), duct and plenum insulation and sealing (see Section C403.2.7) are affected if the space is not conditioned.
Handout page 22
Chapter 4: Residential Energy Efficiency
14.Explain the differences between service hot water systems and circulating hot water systems.
2012 IECC Update 218Handout page 22
Service water-heating is the supply of hot water for purposes other than comfort heating. Circulating hot water system is when the distribution piping is heated to maintain usage temperatures using pipe heating cable, the system pump or heat trace cable that has automatic or manual switches or controls that can be set to optimize system operation or turn off the system during periods of reduced demand.
Chapter 4: Residential Energy Efficiency
15.What is the SHGC for windows in Climate Zone 4?
40
2012 IECC Update 219Handout page 22
Chapter 4: Residential Energy Efficiency
16.Explain Section R405.6.1, Minimum capabilities
2012 IECC Update 220Handout page 22
Section R405.6.1 Minimum capabilities. Calculation procedures used to comply with this section shall be software tools capable of calculating the annual energy consumption of all building elements that differ between the standard reference design and the proposed design.
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