IECC Provisions forMulti-Family Buildings

IECC Provisions forMulti-Family Buildings

Colorado Code Consulting, LLCFor

SWEEP, 2015

Both Commercial and Residential EnergyCode Requirements

Residential VS Commercial

Definition of Residential per IECC isdifferent than that found in theIRC and IBC:

RESIDENTIAL BUILDING. Forthis code, includes detachedone and two family dwellings

and multiple single familydwellings (townhouses) as

well as R-2, R-3 and R-4buildings three stories or lessin height above grade plane.

2

COMMERCIAL BUILDING. Forthis code, all buildings that arenot included in the definitionof "Residential buildings."

COMMERCIAL BUILDING. Forthis code, all buildings that arenot included in the definitionof "Residential buildings."

How is thecode used inthis building?

101.4.1

Construction DocumentationR103

• Submitted details must be able to show full compliance with each coderequirement including:

• Insulation types, locations and R-Values• Fenestration types, locations and U-Factors/SHGC• Mechanical and water heating size, type and efficiency• Equipment and system controls• Duct sealing and insulation locations• Air sealing details• DEPICTION OF THE THERMAL ENVELOPE (R103.2.1)

R103.3: Code Official can hire someone else to do plan review as long as theywere/are not affiliated with the design or construction of the building.

New in the 2015• 103.2.1 Building Thermal

Envelope depiction:• The buildings thermal envelope

shall be represented on theconstruction documents

• Example:• Blue – Exterior air barrier• Yellow Thermal Barrier• Red Interior air barrier

IECC Commercial Compliance Options

2 C402 - EnvelopeC403 - MechanicalC404 - SWHC405 - Lighting

ANDPick OneEfficiency Optionin C406:

1 ASHRAE 90.1-2013 3 C407 – Total BuildingPerformanceC402.5 – Air LeakageC403.2 – Provisionsapplicable to allmechanical systemsC404 - SWHLighting MandatorySections

C405.2C405.3C405.4C405.6

Building energy costto be ≤ 85% ofstandard referencedesign building

2015 IECC - Prescriptive 2015 IECC - Performance

IECC Additional Efficiency Package OptionsSection C406

High Efficiency HVAC

• One additional efficiencyfeature must be selectedto comply with the IECC

• More efficient HVACperformance, OR

• Reduced lighting powerdensity system, OR

• Enhanced lighting controls,OR

• On-site supply ofrenewable energy OR

• Dedicated outdoor airsystem, OR

• More efficient SWH

More Efficient LightingSystem

Onsite Renewables

Dedicated Outdoor Air System

Solar Thermal/More Efficient SWH

Efficient

IECC Chapter 5 Prescriptive Compliance Approach for Commercial

ClimateZone

1 2 3

4ExceptMarine

5And

Marine 46 7 8

Insulationentirelyabovedeck

R-20ci R-25ci R-25ci R-25ci R-25ci R-25ciR-30ci

R-30ci

R-30ci

R-30ci

R-30ci

R-30ci

R-35ci

R-35ci

R-35ci R-35ci

Metalbuildingsa, b

R-19+R-11 LS

R-19+R-11 LS

R-19+R-11 LS

R-19+R-11 LS

R-19+R-11 LS

R-19+R-11 LS

R-19+R-11

LS

R-19+R-11

LS

R-19+R-11

LS

R-19+R-11

LS

R-25+R-11

LS

R-25+R-11

LS

R-30+R-11

LS

R-30+R-11

LS

R-30+R-11 LS

R-30+R-11 LS

Attic andother

R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-38 R-49 R-49 R-49 R-49 R-49 R-49 R-49

ROOFS

IECC Chapter 5 Prescriptive ApproachCompliance

ClimateZone

1 2 34

Except Marine5

And Marine 4 6 7 8

Mass R-5.7ci

R-5.7cic

R-5.7cic R-7.6ci R-7.6ci R-9.5ci R-9.5ci R-

11.4ciR-11.4ci

R-13.3ci

R-13.3ci

R-15.2ci

R-15.2ci

R-15.2ci

R-25ci R-25ci

Metalbuilding

R-13+6.5ci

R-13+6.5ci R-13+

6.5ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-13 ci

R-13+R-19.5 ci

R-13+R-13 ci

R-13+R-19.5 ci

MetalFramed

R-13=

R-5 ci

R-13=R-5 ci

R-13=R-5 ci

R-13+7.5ci

R-13+7.5ci

R-13+7.5ci

R-13+7.5ci

R-13+7.5ci

R-13+7.5ci

R-13+7.5ci

R-13+7.5ci

R-13+7.;5ci

R-13+7.5cfi

R-13+15.6ci

R-13+7.5ci

R-13+17.5ci

WoodFramed& Other

R-13+R-3.8cior R-

20

R-13+R-3.8cior R-

20

R-13+R-3.8cior R-

20

R-13+R-3.8ci

or R-20

R-13+R-3.8ci

or R-20

R-13+R-3.8cior R-

20

R-13+R-3.8ci or

R-20

R-13+R-3.8cior R-

20

R-13+R-3.8cior R-

20

R-13+R-7.5cior R-20+R-3.8 ci

R-13+R-7.5cior R-20+R-3.8 ci

R-13+R-7.5cior R-20+R-3.8 ci

R-13+R-7.5cior R-20+R-3.8 ci

R-13+R-7.5cior R-20+R-3.8 ci

R-13+R

-15.6ci orR-

20+R-10ci

R-13+R-15.6cior R-20+R-10 ci

WALLS, ABOVE GRADEChapter 5 Prescriptive Approach

ClimateZone

1 2 3

4ExceptMarine

5And Marine 4 6 7 8

Belowgradewall(d)

NR NR NR NR NR NR NR R-7.5ci R-7.5ci R-7.5ci R-7.5ci R-7.5ci R-10ci R-10ci R-10ci R-12.5ci

WALLS, BELOW GRADE

Chapter 5 Prescriptive ApproachCompliance

Below Grade WallsTable C402.1.3 or Table C402.1.4

What is a below grade wall?Basement or first-story walls ≥ 85% below grade

Insulation must extend down 10 ft from the outside finishedgrade level or to the level of the lowest floor, whichever is less

Heated slabs installed below grade (footnote d to TablesC402.1.3 and C402.2.14)Below grade walls must meet exterior insulation requirements for

heated slabs

R-value is for continuous insulation

ClimateZone 1 2 3

4ExceptMarine

5And Marine 4 6 7 8

Masse NR NR R-6.3ci R-8.3ci R-10ci R-10ciR-10ci

R-10.4ci

R-10ci

R-12.5ci

R-12.5ci

R-12.5ci

R-15ci

R-16.7ci

R-15ci R-16.7ci

Joist/Framing NR NR R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30 R-30f R-30f R-30f R-30f R-30f

FLOORS

Chapter 5 Prescriptive ApproachCompliance

Floor framing cavity insulation or structural slab insulationshould be installed to maintain permanent contact withunderside of subfloor decking or structural slabs

NEW Exceptions: Framing cavity insulation or structuralslab insulation is permitted to be in contact with top side ofsheathing or ci installed on the bottom side of floor wherecombined with insulation that meets or exceeds R-value inTable C402.1.3 for “Metal framed” or “Wood framed andother” values for “Walls, Above Grade” and extends fromthe bottom to the top of all perimeter floor framing or floorassembly members

• Insulation applied to underside of concrete floor slabs ispermitted an airspace of < 1” where it turns up and is incontact with underside of floor under walls associatedwith the building thermal envelope

FloorsSection C402.2.4

Climate Zone 1 2 34

Except Marine5

And Marine 4 6 7 8

Unheated Slabs NR NR NR NR NR NR

R-10for24 in.below

R-10for24 in.below

R-10for24 in.below

R-10for24 in.below

R-10for24 in.below

R-15for24 in.below

R-15for24. in.below

R-15for24 in.below

R-15 for24 in. below

R-20for24 in.below

HeatedSlabs

R-7.5 for12 in.below

R-7.5 for12 in. below

R-7.5 for12 in. below

R-7.5 for12 in. below

R-10 for24 inbelow

R-10 for24 in. below

R-15for24 in.below

R-15for24 in.below

R-15for36 in.below

R-15for36 in.below

R-15for48 in.below

R-20for48 in.below

R-20for24 in.below

R-20for48 in.below

R-20 for48 in. below

R-20for48 in.below

SLAB-ON GRADEFLOORS

Chapter 5 Prescriptive ApproachCompliance

Slab-on-Grade Floor Insulation IECC C402.2.5

Meet or exceed values in appropriate table for climate zone (includes R-valueand depth or width of insulation)

For Commercial Buildings: only applies to slabs less than 24” below grade

Be installed around the perimeter to the distance specified• Inside foundation wall – extend downward from top of slab a minimum distance

specified or to the top of the footing, whichever is less• Outside foundation wall – extend from top

of the slab or downward to at least thebottom of the slab and then horizontallyto a minimum distance specified

NO!

Climate Zone 1 2 3

4ExceptMarine

5And

Marine 46 7 8

Nonswinging R-4.75 R-4.75 R-4.75 R-4.75 R-4.75 R-4.75R-4.75

R-4.75

R-4.75

R-4.75

R-4.75

R-4.75

R-4.75

R-4.75

R-4.75 R-4.75

OPAQUE DOORS

Chapter 5 Prescriptive ApproachCompliance

What happened to swinging doors?

TABLE C402.1.4OPAQUE THERMAL ENVELOPE ASSEMBLY MAXIMUM REQUIREMENTS, U-FACTOR METHOD a, b

Swinging Doors in IECC are moved

Radiant heating system panels and their associatedcomponents:

• Installed in interior or exterior assemblies to beinsulated with > R-3.5 on all surfaces not facing thespace being heated

• Installed in the building thermal envelope should beseparated from the exterior of the building orunconditioned or exempt spaces by not less than theR-value installed in the opaque assembly in which theyare installed or assembly comply with Section C402.1.4

2015 Exception: heated slabs-on-grade insulated inaccordance with Section C402.2.5

Insulation of Radiant Heating SystemsSection C402.2.6

2012 has conflict with IMC

FenestrationChapter 5 Prescriptive Approach

Not basedon frame

types

Vertical Fenestration RequirementSection C402.4.1 – Prescriptive (Max area)

Percentage of VerticalFenestration Area to Gross WallArea

Allowed up to 30% maximum ofabove grade wall In Climate Zones 1-6, up to

40% maximum of abovegrade wall with daylightingcontrols

40%• No less than 50% of the conditioned floor area is within a daylight zone• in buildings less than 2 stories above grade

40%• No less than 25% of the net floor area is within a daylight zone• in building > 3 stories above grade

40%• Daylight responsive controls complying with C405.2.3.1 are installed in

daylight zones• VT of vertical fenestration is ≥ 1.1 times SHGC

Up to 40% vertical fenestration area allowed in Climate Zones 1-6, provided2015

Limited to ≤ 3% of Roof AreaUp to 5% allowed if automatic daylighting controls

installed in daylight zones under skylights

Skylight Minimum Fenestration AreaSection C402.4.1 Prescriptive

FenestrationChapter 5 Prescriptive Approach

Fenestration SHGC Requirements

The Effect of Overhangs on Fenestration SHGC

Overhangs allow a higher SHGC product to

be installed

Projection factor must be calculated

When different windows or glass doors

have different PFs

Evaluate separately

Example:A=18”B=84”

A/B= 18/84 = .21pf

Mandatory Requirements – IECC Commercial Envelopes

Air Leakage

Air barriers

Fenestration air leakage

Rooms Containing Fuel-burning Appliances

Air intakes, exhaust openings, stairways and shafts

Loading dock weatherseals

Vestibules

Recessed lighting

• Continuous air barrier required except in Climate Zone 2B

• Air barrier placement allowed:• Inside of building envelope• Outside of building envelope• Located within assemblies composing envelope OR Any combination thereof

Air Barriers and ConstructionSection C402.5.1.1

• Penetrations of air barrier and air leakage paths to be caulked,gasketed or otherwise sealed in a manner compatible withconstruction materials and location

• Joints and seals• Sealed in same manner or taped or covered with moisture vapor-permeable

wrapping material• Sealing of concealed fire sprinklers where required in a manner

recommended by manufacturer• Caulking or other adhesive sealants should not be used to fill voids between

fire sprinkler cover plates and walls, or ceilings• Recessed lighting to comply with C402.5.7• Where similar objects are installed that penetrate the air barrier, make

provisions to maintain the air barrier’s integrity

Air Barriers and ConstructionSection C402.5.1.1

The thermal envelope must comply with the requirements of SectionsC402.5.1 – C402.5.8 OR be tested in accordance with ASTM E 779 atpressure differential of 0.3 inch water gauge or an equivalent methodapproved by code official when tested air leakage rate< 0.40 cfm/ft2

Air LeakageSection C402.5

Materials with air permeance ≤ 0.004 cfm/ft2 under pressure differential of 0.3 in. w.g. tested in accordance withASTM E 2178

These materials meet this requirement:

Material Thickness(minimum)

Plywood 3/8 in.

Oriented strand board 3/8 in.

Extruded polystyrene insulation board ½ in.

Foil-faced urethane insulation board ½ in.

Closed cell spray foam minimum density of 1.5 pcf 1-1/2 in.

Open cell spray foam density between 0.4 and 1.5 pcf 4.5 in.

Exterior gypsum sheathing or interior gypsum board ½ in.

Cement board ½ in.

Built up roofing membrane

Modified bituminous roof membrane

Fully adhered single-ply roof membrane

A Portland cement/sand parge, stucco, or gypsum plaster 5/8 in.

Cast-in-place and precast concrete

Sheet metal or aluminum

Solid or hollow masonry constructed of clay or shale masonry units

Two ways to comply with air barrier requirements:Materials – C402.5.1.2.1 OR Assemblies – C402.5.1.2.2

C402.4.1.2.2 Air barrier assemblies

Option 2• Assemblies of materials and

components meeting specific airleakage requirements can comply. 2items listed as “deemed to comply”provided joints are sealed

30

• Concrete masonry walls coatedwith either one application eitherof block filler or two applicationsof a paint or sealer coating OR

• Masonry walls constructed of clayor shale masonry units with anominal width of > 4” OR

• Portland cement/sand parge,stucco or plaster > ½” thick

• Concrete masonry walls coatedwith either one application eitherof block filler or two applicationsof a paint or sealer coating OR

• Masonry walls constructed of clayor shale masonry units with anominal width of > 4” OR

• Portland cement/sand parge,stucco or plaster > ½” thick

• Appliances and combustion air openings to be located outsidethe building thermal envelope or enclosed in a room isolatedfrom inside the thermal envelope in Climate Zones 3-8

• Where open combustion air ducts provide combustion air toopen combustion space conditioning fuel-burning appliances

• Rooms to be sealed and insulated per envelope requirements• Doors into the rooms fully gasketed• Water lines and ducts insulated• Combustion air ducts that pass through conditioned space,

insulated to > R-8Exceptions:• Direct vent appliances with both intake and exhaust pipes

installed continuous to the outside• Fireplaces and stoves complying with 901-905 IMC and Section

2111.13 IBC

Rooms Containing Fuel-burning AppliancesSection C402.5.3

Commercial Mechanical

• Size equipment to ASHRAE 183: absolutely no oversizing allowed• Mandatory efficiency requirements• HVAC System controls• Automatic Dampers• Ventilation according to IMC• Duct and Plenum insulation and Sealing• Piping insulation• Economizers if using the prescriptive approach• Commissioning where required per C408

IECC Residential Compliance Options

2R402.1.4 U-factorAlternative

OR

1 2015 IECC –Prescriptive:

By the book approach

3

R405 – BuildingPerformance basedon Building EnergyCost.

2015 IECC - Prescriptive 2015 IECC – SimulatedPerformance Approach

R402.1.5 TotalUA alternative

2015 Prescriptive R-value Table Compliance SpecificationDeclare to the Code official that the pathway for compliance is the prescriptive path

Table R402.1.2

R402.1.4 U-factor AlternativeCLIMATE ZONE FENESTRATION

U-FACTORSKYLIGHTU-FACTOR

CEILING U- FACTOR FRAME WALLU- FACTOR

MASS WALL U-FACTORb

FLOOR U-FACTOR

BASEMENT WALL U-FACTOR

CRAWL SPACEWALL U- FACTOR

1 0.50 0.75 0.035 0.084 0.197 0.064 0.360 0.477

2 0.40 0.65 0.030 0.084 0.165 0.064 0.360 0.477

3 0.35 0.55 0.030 0.060 0.098 0.047 0.091c 0.136

4 except Marine 0.35 0.55 0.026 0.060 0.098 0.047 0.059 0.065

5 andMarine 4

0.32 0.55 0.026 0.060 0.082 0.033 0.050 0.055

6 0.32 0.55 0.026 0.045 0.060 0.033 0.050 0.0557 and 8 0.32 0.55 0.026 0.045 0.057 0.028 0.050 0.055

An assembly with a U-factor equal to or less than that specified in TableR402.1.4 shall be permitted as an alternative to the R-value in Table R402.1.2

Example: Climate zone 5 framed wall• U- .060 = R-16.67• R-value table requires cavity insulation at R20 or 13+5• 1/20 = U.05 Plus sheathing, air film, etc.

Residential Building Thermal EnvelopeRequirements

R402.4.1.2 Testing (Mandatory)

• The building or dwelling unit shall be testedand verified as having an air leakage rate notexceeding:

• 5 ACH@50 in Climate Zones 1 and 2• 3 ACH@50 in Climate Zones 3 through 8

• Testing shall be conducted by an approved thirdparty

• Reporting

402.4 Air Leakage and Air Barriers (Mandatory)

• The building thermal envelopeshall be constructed to limit airleakage in accordance with therequirements of Sections R402.4.1through R402.4.4.

• The components of the buildingthermal envelope as listed in TableR402.4.1.1 shall be installed inaccordance with themanufacturer’s instructions andthe criteria listed in TableR402.4.1.1

2012 IECC Table

2015 IECC Table

Table 402.4.1.1Component – General Air barrier/Thermal barrier

Air Barrier Criteria Insulation Installation Criteria• A continuous air barrier shall be

installed in the building envelope• Exterior thermal envelope contains a

continuous air barrier.• Breaks or joints in the air barrier shall

be sealed

• Air-permeable insulation shallnot be used as a sealing material

Insulation Air Barrier

Stopping the movement of air from scrubbingaway the stagnate air pocket

Now it works

Insulation traps pockets of air

Stagnate Air Pockets create the R-value

Air-permeable insulation shall notbe used as a sealing material

Table 402.4.1.1Component – Ceiling / Attic

Air Barrier Criteria Insulation Installation Criteria• The air barrier in any dropped

ceiling/soffit shall be alignedwith the insulation and any gapsin the air barrier sealed

• Access openings, drop downstair or knee wall doors tounconditioned attic spaces shallbe sealed

• The insulation in any droppedceiling/soffit shall be alignedwith the air barrier

Ceiling Access Openings

R402.2.1 Ceilings with attic spaces

• R-38 shall be deemed to satisfy therequirement for R-49 wherever the fullheight of uncompressed R-38 insulationextends over the wall top plate at theeaves.

R a ised H ee l T ru ss

B a ff lin g to p re ven tin su la tio n fromb lo ck ing ven tila tio n

R a ised H ee l T ru ss

B a ff lin g to p re ven tin su la tio n fromb lo ck ing ven tila tio n

R-38

R-49

R402.2.3 Eave baffle• For air permeable insulations in

vented attics, a baffle shall beinstalled adjacent to soffit and eavevents

• Baffles shall maintain an openingequal or greater than the size ofthe vent

• The baffle shall extend over the topof the attic insulation

Table 402.4.1.1Component – Walls

Air Barrier Criteria Insulation Installation Criteria• The junction of the foundation

and sill plate shall be sealed• The junction of the top plate and

top of exterior walls shall besealed

• Knee walls shall be sealed

• Cavities within corners and headersof frame walls shall be insulated bycompletely filling the cavity with amaterial having a thermalresistance of R3 per inch minimum

• Exterior thermal envelopeinsulation for framed walls shall beinstalled in substantial contact andcontinuous alignment with the airbarrier

Junction of foundation and sill plate is sealed

Attic Knee Walls

Table 402.4.1.1Component – Rim Joists

Air Barrier Criteria Insulation Installation Criteria• Rim joists shall include the air

barrier• Rim joists shall be insulated

Rim Joist Box Sill

Table 402.4.1.1Component – Floors (including above garage &cantilever floors)

Air Barrier Criteria Insulation Installation Criteria• The air barrier shall be installed

at any exposed edge ofinsulation

• Floor framing cavity insulation shall be installed tomaintain permanent contact with underside ofsubfloor decking

• 2015 IECC introduction• or floor framing cavity insulation shall be

permitted to be in contact with the topside ofsheathing or continuous insulation installed onthe bottom side of floor framing and extendsfrom the bottom to the top of all perimeterfloor framing members.

Floor Insulation

Garage/Home Interface:

No gaps at ends

The air barrier shall be installedat any exposed edge of insulation

Details: CantileverFloor

Cantilevers

Effective detailing

Table 402.4.1.1Component – Crawl Space Walls

Air Barrier Criteria Insulation Installation Criteria• Exposed earth in unvented crawl

spaces shall be covered with aClass I vapor retarder withoverlapping joints taped

• Where provided in lieu of floorinsulation, insulation shall bepermanently attached to thecrawlspace walls

2015 IECC table 402.4.1.1Crawl – Insulation is permanently attached to walls, earth covered andsealed with Class 1 vapor barrier

Supply Air

Mechanically fastenedClass I vapor barrier

Sealed

Thermal Boundary

Table 402.4.1.1Component – Shafts, Penetrations

Air Barrier Criteria Insulation Installation Criteria• Duct shafts, utility penetrations,

fireplace chases and flue shaftsopening to exterior orunconditioned space shall besealed

• In the 2015 IECC the Fireplacesection was consolidated intothis section

Table 402.4.1.1Component – Garage Separation

Air Barrier Criteria Insulation Installation Criteria• Air sealing shall be provided

between the garage andconditioned spaces

Table 402.4.1.1Component – Shower/tub on exterior wall

Air Barrier Criteria Insulation Installation Criteria• The air barrier installed at

exterior walls adjacent toshowers and tubs shall separatethem from the showers and tubs

• Exterior walls adjacent toshowers and tubs shall beinsulated

Tubs and Showers

Table 402.4.1.1Component – Electrical/phone box on exterior walls

Air Barrier Criteria Insulation Installation Criteria• The air barrier shall be installed

behind electrical orcommunication boxes or airsealed boxes shall be installed

Electrical/phone box on exterior walls

Table 402.4.1.1Component – HVAC Register boots

Air Barrier Criteria Insulation Installation Criteria• HVAC register boots that

penetrate building thermalenvelope shall be sealed to thesubfloor or drywall

Who’s job is this?

Table 402.4.1.1Component – Fireplace

Air Barrier Criteria Insulation Installation Criteria• This section was moved in the

2015 IECC• An air barrier shall be installed

on fireplace walls• Fireplaces shall have gasketed

doors

Fireplace

Sequencing is the Issueair barrier 1st then over framing

Table 402.4.1.1Component – Concealed Sprinklers

Air Barrier Criteria Insulation Installation Criteria• When required to be sealed,

concealed fire sprinklers shallonly be sealed in a manner thatis recommended by themanufacturer. Caulking or otheradhesive sealants shall not beused to fill voids between firesprinkler cover plates and wallsor ceilings

Building/Fire Code and Energy CodeNot on the same page

• 2009 IECC• Common wall: Air barrier is installed in common wall between dwelling units

• 2012 and 2015 IECC• Not mentioned in the table

The Problem

Common wall between Dwelling Units taken out of the codetable• Energy Code and

Building/Fire Code arenot in alignment

• Potential swapping oflike materials

• Fire rated foam forrock wool fire stop

• Blown fiberglass forfiberglass batt

Framed wall

Drywall

Air seal here

Air seal hereGap

What constitutes the assembly?

Fill the gap

• Treat Common / Party WallsLike Exterior Walls and requireall air sealing and air barriersadjacent to the assembly

Build TightVentilate Right

M1507.3 Whole-house mechanical ventilation system

• M1507.3.1 System design: The whole-house ventilation system shall consistof: Supply Side, Exhaust Side, Balanced systems, or combination there of

• M1507.3.2 System controls: The whole-house mechanical ventilation systemshall be provided with controls that enable manual override

• M1507.3.3 Mechanical ventilation rate: The whole house mechanicalventilation system shall provide outdoor air at a continuous rate of not lessthan that determined in accordance with Table M1507.3.3(1).

• Exception:• Permitted to operate intermittently where the system has controls that enable

operation for not less than 25-percent of each 4-hour segment and the ventilation rateprescribed is multiplied by the factor determined in accordance with TableM1507.3.3(2).

TABLE M1507.3.3(1)CONTINUOUS WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM AIRFLOW RATE REQUIREMENTS

Simulated Performance and ASHRAE 62.2 Formula: Ventilation can’t be greater than what is calculated by formula

Fan flow (CFM) = 0.01 CFM x your floor area + 7.5 x (your number of bedrooms + 1)

For a 1,510 square foot 4-bedroom home,(0.01 X 1510) + (7.5 times 5)Formula Result: 52.5 CFMChart Result: 75 CFM

R403.7 Equipment Sizing

• Heating and cooling equipment shall be sized in accordance withACCA Manual S based on building loads calculated in accordance withACCA Manual J or other approved heating and cooling calculationtechnologies.

© 2014 Colorado Code Consulting, LLC 77

Exception:• Dwelling units within commercial building are not required to comply

IF they comply with the residential Section R404.1A minimum of 75 percent of the lamps in permanently installed lightingfixtures are high-efficacy lamps or 75% of permanently installed lightingfixtures contain only high efficacy lamps

Exception:

Low-voltage lighting

What’s Covered Under Electrical Power and Lighting Systems Requirements?IECC

Separate metering required for each R-2 dwelling unit

Electrical Energy ConsumptionMandatory RequirementSection C405.6

Commercial or Residential?That is the question!

• Who has the answers?• NBI• DOE• Jurisdictions• You?

QUESTIONS?

Thank You!!!• Presented by:Shaunna Mozingo

Colorado Code Consulting LLC4610 S Ulster St, Ste 150Denver, CO 80237

303-598-3465 direct linesmozingo@coloradocode.net