2012 International Energy Conservation Code Update with Maryland Amendments Based on the 2012...

2012 International Energy Conservation Code Update with Maryland Amendments

Based on the 2012 International Energy Conservation Code ®, (IECC ®)

Maryland Code Administration

http://www.maryland.gov/

http://www.dhcd.state.md.us/

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



Climate ZonesMaryland 4 and 5

2012 IECC Update 8


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


http://www.iccsafe.org/Store/Pages/Product.aspx?category=0&cat=ICCSafe&id=3800X12

http://www.iccsafe.org/Store/Pages/Product.aspx?category=14604&cat=ICCSafe&id=3100X12

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 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


Rei

nspe

ctio

n

• Air Barrier Inspection• Sealing Inspection• Fenestration Inspection• Insulation Inspection• Mechanical Inspection• Concealed Service Water

Heating System Inspection


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


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


IECC Inspection

5. Verify compliance with mandatory provisions of the code;


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.)


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


IECC—Commercial Provisions, therefore, contain provisions for residential buildings four stories or greater in height.



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.


Table of Contents


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


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.



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.



NEW for Commercial/Residential Building site A contiguous area of land that is under the

ownership or control of one entity.



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.



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.



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.



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.



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.



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.



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.



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.



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.



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.



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.



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.



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.



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


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



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



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.



REVISED for Commercial/Residential

Residential Building Revised to clarify that it

includes one- and two-family dwellings and multiple single family dwellings (townhouses).



REVISED for Commercial/Residential Skylight Revised to “slope less than 60 degrees

(1.05 rad).”



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.



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.



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.


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.



REVISED for Commercial/Residential C303.1.3/R303.1.3

Fenestration product rating:

“Label or Table”



Label or Table Solutions National Fenestration Rating Council

Component Modeling Approach (CMA) for site-built commercial windows.

Field Labeling available for missing labels.



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.


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


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.


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.


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.




Maryland Climate Zones 4 and 5


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 72


Table R402.1.3 Equivalent U-Factors

REVISED Data and footnotes changed.


2012 IECC Update 74


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


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.


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.


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.


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.


C402.3.1.2 Increased skylight area with daylighting controls

NEW Skylight area increased from 3 to 5

percent with automatic daylighting controls.


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.


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.


Table C402.3.3.1 SHGC Adjustment Multipliers

NEW Table of SHGC adjustment multipliers


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.


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.


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.


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.


C402.3.4 Area-weighted U-factor

NEW Area weighted U-factor is permitted to

satisfy the U-factor requirements for commercial buildings.


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.


C402.4.1.1 Air barrier construction

NEW Construction details of air barriers with

exception.


Section C402.4.1.2 Air barrier compliance options

NEW Three options-choose from one or all:

Materials Assemblies Building Test


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.


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.


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


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.


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


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.


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.


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.


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.


C402.4.7 Vestibules

REVISED Requirements for vestibules have been

clarified; i.e., employee only doors are explicitly exempted.


C403 Building Mechanical Systems

NEW Specific standards for

certain heating, ventilation and airconditioning (HVAC) system types.


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.


C403.2.3.2 Positive displacement (air and water-cooled chilling packages)

NEW Positive displacement chilling packages

were not covered by the 2009 IECC.


Table C403.2.3(8) Heat Rejection Equipment

NEW


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


C403.2.4.3.3 Automatic start capabilities

NEW Automatic start-control requirements.


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.


C403.2.6 Energy recovery ventilation systems

REVISED Changed supply airflow rate and revised

exceptions from 2009 IECC.


Table C403.2.6 Energy Recovery Equipment

NEW New table of climate zones to percent of outdoor

air for design supply fan airflow rate.


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).


C403.2.8.1Protection of piping insulation

NEW Piping insulation requirements to protect

piping.


C403.2.9 Mechanical systems commissioning and completion requirements NEW Mechanical systems shall be

commissioned and completed in accordance with Section C408.2.


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.


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


REVISED

C403.3.1 Economizers

REVISED Economizer requirements increased.


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.


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.


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.


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.


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.


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.


C404 Service Water Heating

REVISED

1. Piping insulation requirement beneficial.

2. Controls to be readily accessible.

3. Pools and spas requirement revised.


Section C404.5 Piping insulation

REVISED Added exception to allow manufacturer’s

insulation instructions for heat-traced piping systems.


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.


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.


Section C405 Electrical Power and Lightning System

REVISED Lighting Control requirements are

expanded. Space-by-space option added.


C405.2.1Manual lighting controls

REVISED All buildings shall include manual lighting

controls, whereas in the 2009 IECC lighting systems were provided with controls.


C405.2.1.2 Light reduction controls

REVISED Exceptions revised.


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.


C405.2.2.2 Occupancy sensors

NEW Occupancy sensors requirements.


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.


C405.2.3Specific application controls

NEW Specific application controls requirements.


C405.5.2 Interior lighting power

REVISED Building area and space-by-space

methods to determine the total interior lighting power allowance.


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.


Section C406 Additional Efficiency Package Options

NEW Choose one:

1. Efficient HVAC performance

2. Efficient lighting

3. On-site renewable energy


C406.2 Efficient HVAC performance

NEW Equipment shall meet

the minimum efficiency requirements of Tables 506.2(1) through (7).


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.


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 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.


Table C406.2(6) Chillers—Efficiency Requirements

REVISED Revised table data and footnotes.


C406.3Efficient lighting system

NEW Whole building lighting power density

requirements.


Table C406.3 Reduced Interior Lighting Power

NEW Table for reduced interior lighting power

density (LPD) for building area types.


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.


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.


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.


Section C408.2.1 Commissioning plan

NEW A commissioning plan shall be developed

by a registered design professional or approved agency.


Section C408.2.2Systems adjusting and balancing

NEW HVAC systems adjusting and balancing

activities Air systems Hydronic systems


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.


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.


C408.3 Lighting system functional testing

NEW Controls for automatic lighting systems.


C408.3.1Functional testing

NEW Testing that will ensure that control

hardware and software are calibrated, adjusted, programmed and in proper working condition.


Chapter 4: Commercial Energy Efficiency

7. List the roof requirements for a commercial building in this code.


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


8. What is the minimum skylight fenestration area?


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).


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?


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).


10.List the requirements of mechanical systems commissioning and completion in this code.


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


11.What is a functional test for an economizer? What is a functional test for control hardware and software?


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

Residential Energy EfficiencyChapter 4


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).


R401.3 Certificate

REVISED Certificate shall be completed and posted

by builder or registered design professional.


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.



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.




Maryland Climate Zones 4 and 5


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.



REVISED Data and footnotes changed.


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.


R402.2.3 Eave baffle

NEW A baffle is required adjacent to soffit and

eave vents.


R402.2.6 Steel-frame ceilings, walls and floors

REVISED Changed references to Sections in this

code.


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.


R402.2.12 Sunroom insulation

REVISED Title and

requirements with exceptions.


R402.3 Fenestration

REVISED Requirements of fenestration with

Sections R402.3.1 through R402.3.6.


R402.3.5 Sunroom U-factor

REVISED Fenestration requirements with exception

for sunrooms. U factor values changed from 2009 IECC.


R402.4.1 Building thermal envelope

REVISED Sealing methods and requirements

changed from 2009 IECC.


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.


R402.4.1.2 Testing


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.


R402.4.4 Recessed lighting

REVISED No change other than

listing testing after air leakage rate for recessed luminaires.


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.


R403.2.2 Sealing

REVISED Eliminated building cavities used as ducts

shall be sealed. Testing requirements changed and

exceptions were added.


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.


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.


R403.3.1Protection of piping insulation

NEW Piping insulation requirements

Exposed to weather shall be protected from damage

Adhesive tape shall not be permitted.


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.


R403.4.1 Circulating hot water systems

REVISED Eliminated insulating circulating service

hot water piping with Group R-2.


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.


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.


R403.5 Mechanical ventilation

REVISED Ventilation must meet

the International Residential Code or International Mechanical Code, or other means applicable.


R403.5.1 Whole-house mechanical ventilation system fan efficacy

NEW Introduces “whole-house mechanical

ventilation.”


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


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.


R403.9 Pools and in ground permanently installed spas

REVISED Heater, time switch

and cover requirements for pools and in ground, permanently installed spas.


R404 Electrical Power and Lighting Systems

REVISED 75 percent of the total lamps shall be high

efficacy lamps. Fuel Gas Lighting


R404.1.1 Lighting equipment

NEW Fuel gas lighting systems shall not have

continuously burning pilot lights.


R405 Stimulated Performance Alternative

REVISED Process Is virtually unchanged-

performance is improved.


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.


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.


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.


Chapter 4: Residential Energy Efficiency

12.What are R-values for Climate Zones 2 and 3 for the ceiling?

R-30 to R-38.



13.Explain conditioned space and how it affects residential and commercial buildings?


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


14.Explain the differences between service hot water systems and circulating hot water systems.


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.


15.What is the SHGC for windows in Climate Zone 4?

40



16.Explain Section R405.6.1, Minimum capabilities


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.

2252006 IECC® Fundamentals

229

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