Building Energy Codes Program Commercial Program Review

Building Energy Codes Program Commercial Program Review

BUILDING ENERGY CODES UNIVERSITY Residential Requirements of the 2009 International Energy Conservation Code August 2010 BUILDING ENERGY CODES UNIVERSITY PNNL-SA-65859 1 www.energycodes.gov/training The Family of I-Codes International Building Code International Mechanical Code International Fuel Gas Code International Property Maintenance Code International Fire Code International Zoning Code International Plumbing Code Code Requirements for Housing Accessibility

International Private Sewage Disposal Code ICC Electrical Code International Residential Code International Energy Conservation Code 2 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Relationship Between IRC and IECC IECC addresses only energy IRC addresses all topics (structural, plumbing, etc.) Allows builder to carry only one code book Chapter 11 covers energy efficiency IRC allows compliance with IECC as an alternative to Chapter 11 IECC addresses both residential and commercial; IRC addresses subset of residential detached one- and two-family dwellings and townhouses 3 stories or fewer Energy requirements in IRC and IECC almost identical IRC requires 0.35 SHGC in Climate Zones 1-3; IECC requires 0.30

IRC has less stringent foundation requirements in northern zones Other minor differences 3 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Whats Changed Since IECC 2006? Some envelope requirements more stringent New requirements added Building envelope tightness verification Duct leakage pressure test Lighting efficacy limits Pool controls and covers Snow melt controls Moisture control requirements (e.g., vapor retarders) moved to IRC No mechanical trade-offs allowed A few performance path assumptions changed 4

BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Structure of the IECC Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Administrative Residential

Definitions Chapter Climate Zones Residential Energy Efficiency Commercial Energy Efficiency Referenced Standards 5 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Scope 1263068 Residential Buildings: IECC has one- and twofamily R-2, R-3, R-4 3 stories All buildings that are not residential by definition are commercial Includes additions,

alterations, renovations and repairs 1831523 BUILDING ENERGY CODES UNIVERSITY 6 www.energycodes.gov/training Scope Exempted Buildings Very low energy use buildings (<3.4 Btu/h-ft2 or 1 watt/ft2) Buildings (or portions of) that are neither heated nor cooled Existing buildings (Section 101.4.1) Electrical power, lighting, and mechanical systems still apply Buildings designated as historic (Section 101.4.2) 7 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Scope - Additions, Alterations, Renovations, Repairs Code applies to any new construction Unaltered portion(s) do not need to comply Additions can comply alone or in combination with existing building Replacement fenestration that includes both glazing and sash must meet 0.30 SHGC in Climate Zones 1-3 U-factors in all Zones 8 BUILDING ENERGY CODES UNIVERSITY

www.energycodes.gov/training Scope - Additions, Alterations, Renovations, Repairs Exceptions Storm windows over existing fenestration Glass-only replacements Exposed, existing ceiling, wall or floor cavities if already filled with insulation Where existing roof, wall or floor cavity isnt exposed Reroofing for roofs where neither sheathing nor insulation exposed Insulate above or below the sheathing Roofs without insulation in the cavity Sheathing or insulation is exposed Provided installed interior lighting power isnt increased and < 50% of luminaires in a space are replaced Only bulb and ballast within existing luminaires in a space are replaced Any nonconditioned space that is altered to become conditioned space is required to be brought into full compliance with code. 9 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Space Conditioning Any nonconditioned space that is altered to become conditioned space shall be required to be brought into full compliance with this code Examples: - Converting a garage to a family room - Heating a basement 10 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Scope - Mixed Use Buildings Treat the residential occupancy under the applicable residential code Treat the commercial occupancy under the commercial code

11 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Overview of Structure Climate-Specific Requirements: Foundations Basements Slabs Crawlspaces Above grade walls Skylights, windows, and doors Roofs Solar Heat Gain Coefficient in warm climates

Universal Requirements (apply everywhere): Duct insulation and sealing Infiltration control 12 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Climate Zones for the 2009 IECC 13 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Overview of Residential Code Requirements Focus is on building envelope Ceilings, walls, windows, floors, foundations Sets insulation and fenestration levels, and solar heat gain coefficients

Infiltration control - caulk and seal to prevent air leaks Ducts seal and insulate Limited space heating, air conditioning, and water heating requirements Federal law sets most equipment efficiency requirements, not the I-codes No appliance requirements Lighting equipment 50% of lamps to be high-efficacy lamps 14 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Insulation and Fenestration Requirements by Climate Zone Table 402.1.1 Insulation and Fenestration Requirements by Component R-values are minimums, U-factors and SHGC are maximums, R-19 batts compressed into a nominal 2 x 6 framing cavity such that the R-value is reduced by R-1 or more shall be

marked with the compressed batt R-value in addition to the full thickness R-value. b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. c. 15/19 means R-15 continuous insulated sheathing on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. 15/19 shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulated sheathing on the interior or exterior of the home. 10/13 means R-10 continuous insulated sheathing on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement wall. d. R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Zones 1 through 3 for heated slabs. e. There are no SHGC requirements in the Marine Zone. f. Basement wall insulation is not required in warm-humid locations as defined by Figure 301.1 and Table 301.1. g. Or insulation sufficient to fill the framing cavity, R-19 minimum. h. 13+5 means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers 25 percent or less of the exterior, insulating sheathing is not required where structural sheathing is used. If structural sheathing covers more than 25 percent of exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-2. i. The second R-value applies when more than half the insulation is on the interior of the mass wall. j.

For impact rated fenestration complying with Section R301.2.1.2 of the IRC or Section 1608.1.2 of the IBC, maximum U-factor shall be 0.75 in Zone 2 and 0.65 in Zone 3. a. 15 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training U-Factor and Total UA Alternatives U-factor Alternative Similar to Prescriptive R-Value but uses U-factors instead. Allows for innovative or less common construction techniques such as structural insulated panels or advanced framing Allows no trade offs between building components Total UA Alternative Same as U-factor alternative but allows trade-offs across all envelope components Primary approach used in REScheck software UA U factor x area of assembly

16 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Fenestration Trade-off Limits Hard limits on U-factor in northern U.S. (cannot be exceeded, even in trade-offs) Climate Zones 4-5 6-8 U-Factor Maximum 0.48 0.40 U-0.75 for skylights in Zones 4-8 These are based on building average; U-factors of individual windows or skylights can be higher if maximum area-weighted average is below these limits.

17 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Fenestration Trade-off Limits, contd. Hard limit on Solar Heat Gain Coefficient in southern U.S. (Zones 1-3) SHGC cannot exceed 0.50, even in performance tradeoffs Solar Heat Gain Coefficient 18 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Locations with Window SHGC Requirements

0.30 SHGC 19 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Requirements by Climate Zone (U-Factor Table) Table 402.1.3 Equivalent U-Factors CLIMATE ZONE 1 2 3 4 except Marine 5 and Marine 4

6 7 and 8 FENESTRATION U-FACTOR SKYLIGHT U-FACTOR CEILING U-FACTOR FRAME WALL U-FACTOR MASS WALL Ub FACTOR FLOOR

BASEMENT WALL U-FACTOR d U-FACTOR CRAWL SPACE WALL c U-FACTOR 1.20 0.65 0.50 0.35 0.75 0.75 0.65 0.60

0.035 0.035 0.035 0.030 0.082 0.082 0.082 0.082 0.197 0.165 0.141 0.141 0.064 0.064 0.047 0.047 0.360 0.360

0.091c 0.059 0.477 0.477 0.136 0.065 0.35 0.60 0.030 0.057 0.082 0.033 0.059

0.065 0.35 0.35 0.60 0.60 0.026 0.026 0.057 0.057 0.060 0.057 0.033 0.028 0.050 0.050

0.065 0.065 Nonfenestration U-factors shall be obtained from measurement, calculation or an approved source. When more than half the insulation is on the interior, the mass wall U-factors shall be a maximum of 0.17 in Zone 1, 0.14 in Zone 2, 0.12 in Zone 3, 0.10 in Zone 4 except Marine, and the same as the frame wall U-factor in Marine Zone 4 and Zones 5 through 8. c. Basement wall U-factor of 0.360 in warm-humid locations as defined by Figure 301.1 and Table 301.2. a. b. 20 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training IECC Compliance - Three Options Prescriptive R-values

402.1.1 U-Factor and UA Alternatives U-factor 402.1.3 Total Building UA 402.1.4 Simulated Performance (software) Simulated Performance Alternative 405 21 BUILDING ENERGY CODES UNIVERSITY

www.energycodes.gov/training Code Compliance Tools Prescriptive None Needed Total Building UA Trade-off Energy Analysis REScheck Software (Web-based & Desktop) Software (example): REM/Design REM/Rate EnergyGauge

22 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Building Envelope Specific Requirements Building Envelope consists of: Ceilings Walls Above grade Below grade Mass walls Fenestration

Floors Slab Crawl space attic Conditioned Space 23 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Ceilings Requirements based on Assembly type Continuous insulation Insulation between framing (cavity insulation) Meet or exceed R-values 24

BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Ceilings with Attics Ceiling insulation requirements in R-value table assume standard truss systems Possibility of ice dam formations Insulation Insulation Cold corners contribute to condensation and mold growth in some locations 25

BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Ceilings with Attics, Contd. Insulation at full thickness over exterior walls Insulation Insulation Prescriptive R-value path encourages raised heel truss (aka, energy truss) If insulation is full height over exterior wall top plate R-30 complies where R-38 is required R-38 complies where R-49 is required

Note: This allowance ONLY applies to the R-value prescriptive path, not the U-factor or Total UA alternatives BUILDING ENERGY CODES UNIVERSITY 26 www.energycodes.gov/training Ceilings without Attics (e.g., vaulted) Where Insulation levels are required > R-30 Not sufficient amount of space to meet higher levels R-30 allowed for 500 ft2 or 20% total insulated ceiling area, whichever is less 27 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Access Hatches and Doors

(Prescriptive) Weatherstrip and insulate doors from conditioned spaces to unconditioned spaces (e.g., attics and crawl spaces) Insulate to level equivalent to surrounding surfaces e.g., required ceiling insulation = R-38, then attic hatch must be insulated to R-38 Provide access to all equipment that prevents damaging or compressing the insulation Install a wood framed or equivalent baffle or retainer when loose fill insulation is installed 28 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Walls Covered by IECC

Exterior above-grade walls Attic kneewalls Skylight shaft walls Perimeter joists Basement walls Garage walls (shared with conditioned space) 29 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Above Grade Walls Insulate walls including those next to unconditioned spaces Dont forget to insulate rim joists

30 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Wood-Frame Walls Required R-value can be met with any combination of cavity or continuous insulation Exception in zones 5-6: R-13 cavity plus R-5 sheathing meets R-20 requirement 31 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Steel-frame Table 402.2.5 Steel-Frame Ceiling, Wall and Floor Insulation

(R-Value) Ceilings, walls, and floors Exceptions Climate Zones 1 and 2 ci can be reduced to R-3 for 24 o.c. walls Cold-Formed Steel Equivalent R-value Wood Frame R-value Steel Truss Ceilings R-30 R-38 or R-30 + 3 or R-26 + 5

R-38 R-49 or R-38 + 3 R-49 R-38 + 5 Steel Joist Ceilings R-30 R-38 in 2x4, or 2x6, or 2x8 R-49 any framing R-38 R-49 2x4, or 2x6, or 2x8, or 2x10 Steel Framed Wall R-13

R-13 + 5 or R-15 +4, or R-21 +3 or R-0+10 R-19 R-13 + 9 or R-19 +8 or R-25 +7 R-21 R-13 +10 or R-19 +9 or R-25 +8 Steel Joist Floor BUILDING ENERGY CODES UNIVERSITY R-13 R-19, 2x6 R-19 + 6 in 2x8 or 2x10 R-19 R-19 + 6 in 2x6 R-19 +12 in 2x8 or 2x10

32 www.energycodes.gov/training Steel Frame Walls (and ceilings, floors) Table 402.2.5 Steel-Frame Ceiling, Wall and Floor Insulation (R-Value) Cold-Formed Steel Equivalent R-valuea Wood Frame R-value R-X + Y means R-X R-30 R-38 or R-30 + 3 or R-26 + 5 cavity plus R-Y R-38 R-49 or R-38 + 3 continuous R-49

R-38wood+5 Table keys on the Steel Joist Ceilings Exception: In climate frame requirement for the R-30 R-38 in 2x4, or 2x6, or 2x8 zones 1 and 2, the R-49 any framing corresponding building continuous R-value can R-38 R-49 2x4, or 2x6, or 2x8, or 2x10 component Steel Framed Wall be reduced to R-3 for R-13 R-13 + 5 or R-15 +4, or R-21 +3 or R-0+10

walls on 24 centers R-19 R-13 + 9 or R-19 +8 or R-25 +7 R-21 R-13 +10 or R-19 +9 or R-25 +8 In ceilings, insulation that Steel Joist Floor exceeds the height of the R-13 R-19, 2x6 framing must cover the R-19 + 6 in 2x8 or 2x10 framing R-19 R-19 + 6 in 2x6 Steel Truss Ceilingsb b R-19 +12 in 2x8 or 2x10 BUILDING ENERGY CODES UNIVERSITY 33

www.energycodes.gov/training Mass Wall Requirements Second (higher) number applies when more than half the R-value is on the interior of the mass (i.e., when the thermal mass is insulated from the conditioned space) 34 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Mass Walls What type Concrete block, concrete, insulated concrete form (ICF), masonry cavity, brick (other than brick veneer), earth, and solid timber/logs Provisions

At least 50% of the required R-value must be on the exterior or integral to the wall to use values in Table 402.1.3 When more than half the insulation is on the interior, the mass wall U-factors: Climate Zones U-Factor Maximum 1 0.17 2 0.14 3 0.12 4 except Marine 0.10 4 Marine same as above grade frame wall 5-8 same as above grade frame wall 35 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training

Defining Below-Grade Walls Basement Wall >50% below grade Below grade Basement wall Exterior Wall <50% below grade 36 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Below-Grade Walls

X/Y means R-X continuous or R-Y cavity 15/19 requirement can be met with R-13 cavity (interior) plus R-5 continuous (exterior) In zone 3, no insulation required in warm-humid counties 37 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Below-Grade Walls 50% below grade Otherwise treat as above- grade wall Climate Zones 1-2 3 4-5 6-8

R-Value 0 5/13 10/13 15/19 BUILDING ENERGY CODES UNIVERSITY Insulated from top of basement wall down to 10 ft below grade or basement floor, whichever is less 38 www.energycodes.gov/training Fenestration Doors and windows

NFRC rating or default table If no labeled U-factor and SHGC, use default table No glass area limits Exemptions (prescriptive path only) Up to 15 ft2 of glazing per dwelling unit (Section 402.3.3) One side-hinged opaque door assembly up to 24 ft2 (Section 402.3.4) 39 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Fenestration Area-weighted Average Can be used to satisfy U-factor and SHGC requirements Subject to hard limits, even in trade-offs 40 BUILDING ENERGY CODES UNIVERSITY

www.energycodes.gov/training Floors Over Unconditioned Space Exception: If framing members are too small to accommodate R30, insulation that fills the framing cavity, not less than R-19, complies BUILDING ENERGY CODES UNIVERSITY 41 www.energycodes.gov/training Floors over Unconditioned Space Unconditioned space includes unheated basement, vented crawlspace, or outdoor air Climate Zones 1-2 3-4ab 4c-6 7-8

R-Value 13 19 30 * 38 * Insulation must maintain permanent contact with underside of subfloor * Exception: Climate Zones 4c-8 R-19 permitted if cavity completely filled BUILDING ENERGY CODES UNIVERSITY 42 www.energycodes.gov/training

Slab Edge Insulation Flashing Protection Board Figure 2 Slab Rigid Insulation Figure 3 Slab Rigid Insulation Figure 4 Slab Rigid Insulation 43 BUILDING ENERGY CODES UNIVERSITY

www.energycodes.gov/training Slab Edge Insulation Bevel Cut Slab Rigid Insulation 44 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Crawlspace Wall Insulation Implies an unvented crawlspaces (aka, conditioned crawlspace) Space must be mechanically vented or receive minimal supply air (see Section R408 of the IRC) Exposed earth must be covered with a continuous Class I vapor retarder

45 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Vented & Unvented Crawlspaces Vented Crawlspace Requirements: Unvented Crawlspace Requirements: The raised floor over the crawlspace must be insulated.

A vapor retarder may be required as part of the floor assembly. Ventilation openings must exist that are equal to at least 1 square foot for each 150 square feet of crawlspace area and be placed to provide cross-flow (IRC 408.1, may be less if ground vapor retarder is installed). Ducts in crawlspace must be sealed and have R-6 insulation. BUILDING ENERGY CODES UNIVERSITY

The crawlspace ground surface must be covered with an approved vapor retarder (e.g., plastic sheeting). Crawlspace walls must be insulated to the R-value requirements specific for crawlspace walls (IECC Table 402.1.1). Crawlspace wall insulation must extend from the top of the wall to the inside finished grade and then 24 vertically or horizontally. Crawlspaces must be mechanically vented (1 cfm exhaust per 50 square feet) or conditioned (heated and cooled as part of the building envelope). Ducts are inside conditioned space and therefore dont need to be insulated. 46

www.energycodes.gov/training Simulated Performance Alternative Requires computer software with specified capabilities (local official may approve other tools) Includes both envelope and some systems, but not HVAC or water heater efficiency Allows greatest flexibility Can trade-off tight duct systems Defines compliance based on equivalency of calculated energy or energy cost Section 405 specifies ground rules These will generally be hidden in compliance software calculation algorithms Very similar ground rules are used in home federal tax credits and ENERGY STAR Home guidelines 47 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training

Mandatory Requirements Air Leakage Building thermal envelope (Section 402.4) Recessed lighting Fenestration Fireplaces Penetrations Ceiling Chimney Lights Attic Hatch Window Floor Wiring Exterior Door

Foundation Plumbing 48 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Air Sealing and Insulation Two options to demonstrate compliance Whole-house pressure test Air leakage <7 ACH when tested at pressure differential of 0.2 inches w.c. Testing may occur any time after rough in and installation of building envelope penetrations Field verification of items listed in Table 402.4.2. 49 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Air Leakage Control Building thermal envelope Durably sealed Caulked Gasketed Weatherstripped Air barrier material Suitable film or solid material 50 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Areas for Air Leakage (Infiltration) Windows and doors

Between sole plates Floors and exterior wall panels Plumbing Electrical Service access doors or hatches Recessed light fixtures Rim joist junction 51 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Recessed Lighting Fixtures Type IC rated and labeled as meeting ASTM E 283 when tested at 1.57 psf (75 Pa) pressure differential with no more than 2.0 cfm of air movement Sealed with a gasket or caulk between the housing and interior wall or ceiling covering

52 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Fenestration Air Leakage Windows, sliding glass doors and skylights Air filtration rate < 0.3 cfm/ft2 Swinging doors < 0.5 cfm/ft2 Exceptions Site-built windows, skylights, and doors 53 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Fireplaces New wood-burning fireplaces shall have gasketed doors and outdoor combustion air. 54 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Mechanical Systems & Equipment Equipment efficiency set by Federal law, not the I-Codes 55 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Mandatory Requirements Systems (Section 403) Controls Heat pump supplementary heat Ducts

Sealing (Mandatory) Insulation (Prescriptive) HVAC piping insulation Circulating hot water systems Ventilation Equipment sizing Systems serving multiple dwelling units Snow melt controls Pools BUILDING ENERGY CODES UNIVERSITY 56

www.energycodes.gov/training Programmable Thermostat - Controls If primary heating system is a forced-air furnace At least one programmable thermostat/ dwelling unit Capability to set back or temporarily operate the system to maintain zone temperatures down to 55F (13C) or up to 85F (29C) Initially programmed with: heating temperature set point no higher than 70F (21C) and cooling temperature set point no lower than 78F (26C) 57 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training

Heat Pump Supplementary Heat Controls Prevent supplementary electric-resistance heat when heat pump can meet the heating load Exception During defrost 58 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Ducts Insulation (Prescriptive) Supply ducts in attics: R-8 All other ducts: R-6 Sealing (Mandatory) Joints and seams shall comply with IRC, Section M1601.4.1

Building framing cavities shall not be used as supply ducts 59 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Duct Location Examples 60 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Duct Tightness Tests All ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed (Section 403.2.2) Duct tightness shall be verified by either Post construction test Leakage to outdoors: 8 cfm/per 100 ft2 of conditioned floor area

or Total leakage: 12 cfm/per 100 ft2 of conditioned floor area tested at a pressure differential of 0.1 in w.g. (25Pa) across entire system, including manufacturers air handler enclosure All register boots taped or otherwise sealed OR Rough-in test Total leakage 6 cfm/per 100 ft2 of conditioned floor area tested at a pressure differential of 0.1 in w.g. (25Pa) across roughedin system, including manufacturers air handler enclosure all register boots taped or otherwise sealed if air handler not installed at time of test Total air leakage 4 cfm/per 100 ft2 Exceptions: Duct tightness test is not required if the air handler and all ducts are located within conditioned space 61 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training

Piping Insulation R-3 required on HVAC systems Exception: Piping that conveys fluids between 55 and 105F R-2 required on All circulating domestic hot water systems Systems also require a readily accessible manual switch 62 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Ventilation and Equipment Sizing Ventilation Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the ventilation system is not operating

Equipment Sizing IECC references Section M1401.3 of the IRC Load calculations determine the proper capacity (size) of equipment Goal is big enough to ensure comfort but no bigger Calculations shall be performed in accordance with ACCA Manual J or other approved methods 63 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Snow Melt System Controls Snow- and ice-melting system controls Automatic shutoff when pavement temperature is > 50F and no precipitation is falling Automatic or manual shutoff when outdoor

temperature is > 40F 64 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Pools Pool heaters with a readily accessible on-off switch fired by natural gas not allowed to have continuously burning pilot lights Time switches to automatically turn off and on heaters and pumps according to a preset schedule installed on swimming pool heaters and pumps. Exceptions Public health standards requiring 24-hour pump operation

Pumps operating pools with solar-waste-heat recovery heating systems 65 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Pool Covers On heated pools If heated to >90F, vapor-retardant pool cover at least R-12 Exception: If >60% of energy from site-recovered or solar energy source 66 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Systems Systems serving multiple dwelling units shall comply with

Sections 503 and 504 in lieu of Section 403 67 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Lighting Equipment (Prescriptive) A minimum of 50 percent of the lamps in permanently installed lighting fixtures shall be high-efficacy lamps 68 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Compliance/Documentation/ Inspections Code Official has final authority Software, worksheets

Above Code Programs Electronic media can be used Construction work for which a permit is required is subject to inspection Certificate is required 69 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Compliance/Documentation/ Inspections Code Officials Inspection Successive and final inspections, and reinspections if necessary Code Validity Code deemed to be illegal or void shall not affect the remainder

of the code Codes and standards considered part of the requirements of the code Provisions take precedence Fees Must be paid before permit is issued Required in accordance with schedule 70 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Certificate Permanently posted on or in the electrical distribution panel Dont cover or obstruct the visibility of other required labels Includes the following: R-values of insulation installed for the thermal building

envelope, including ducts outside conditioned spaces U-factors for fenestration SHGC for fenestration HVAC efficiencies and types SWH equipment 71 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Certificate (contd) Certificate lists gas-fired unvented room heater, electric furnace, or baseboard electric heater, rather than listing an efficiency for those heating types 72 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training

Additions Treat as a stand-alone building Additions must meet the prescriptive requirements in Table 402.1.1 (or U-factor or total UA alternatives) N 73 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Sunrooms Less stringent insulation R-value and glazing U-factor requirements Sunroom definition: One story structure Glazing area >40% glazing of gross exterior wall and roof area Separate heating or cooling system or zone

Must be thermally isolated (closeable doors or windows to the rest of the house) Can always meet Table 402.1.1 requirements with unlimited glass 74 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training Sunroom Requirements Ceiling Insulation Zones 1-4 R-19 Zones 5-8 R-24 Wall Insulation All zones

R-13 Fenestration U-Factor Zones 4-8 0.50 Skylight U-Factor Zones 4-8 0.75 75 BUILDING ENERGY CODES UNIVERSITY www.energycodes.gov/training

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