BUILDING ENVELOPE INSULATION AND AIR SEALING
BUILDING ENVELOPE Requirements: • Complete Table P1 of the “2024 Insulation and Air Sealing Incentive Supplemental Data Sheet” for this measure. • These incentives are for providing complete building air sealing and insulation for wall and attics in existing multifamily (4+ units under one roof). • Common areas. • Units as part of a whole building improvement. • Whole building air sealing shall be performed in accordance with building science industry best practices and in compliance with local building codes. • Eligible insulation types include but are not limited to fiberglass batts, spray foam, loose fill cellulose, metalized polymers, or other material providing that the insulation meets local and state building codes. • Attic: • Existing attic insulation must be as specified in the measure description: either ≤ R-11, between R-12 and R-19, or between R-20 and R-38 (excluding assembly section). • For existing insulation of ≤ R-19 additional insulation must bring attic up to R-38 or greater. For existing insulation between R-20 to R-38 additional insulation must bring attic up to R-49 or greater. • Sq. ft. of insulation should be listed on the invoice or other supporting documentation provided with the incentive application. • Wall: • Existing wall insulation must be R-5 or less. • Additional wall insulation must bring walls up to at least R-20 of cavity insulation. • The use of R-13 cavity insulation plus R-5 insulated sheathing is considered equivalent to cavity insulation of R-20. • Sill boxes are considered part of the exterior wall. • Square feet of insulation should be listed on the invoice or other supporting documentation provided with the incentive application.
EQUIPMENT UPGRADES AND RETROFITS Measure Description
Code Incentive
Unit
Exterior Wall Insulation, Existing < R-5, Natural Gas Heat w/ Cooling
I3703 + I4749*
$0.80 per sq. ft of wall area improved
Exterior Wall Insulation, Existing < R-5, Natural Gas Heat w/o Cooling
I3704 + I4750* $0.80 per sq. ft of wall area improved
Exterior Wall Insulation, Existing < R-5, Electric Heat w/ Cooling
I3705 + I4751*
$0.80 per sq. ft of wall area improved
Exterior Wall Insulation, Existing < R-5, Electric Heat w/o Cooling
I3706 + I4752*
$0.80 per sq. ft of wall area improved
Air Sealing and Attic Insulation, Natural Gas Heat w/ Cooling, ≤R-11
I3707 + I4749*
$1.00 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Natural Gas Heat w/o Cooling, ≤R-11
I3708 + I4750*
$1.00 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Electric Heat w/ Cooling, ≤R-11
I3711 + I4751*
$1.00 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Electric Heat w/o Cooling, ≤R-11
I3712 + I4752*
$1.00 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Natural Gas Heat w/ Cooling, R-12 to R-19
I3709 + I4749*
$0.70 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Natural Gas Heat w/o Cooling, R-12 to R-19
I3710 + I4750*
$0.70 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Electric Heat w/ Cooling, R-12 to R-19
I3713 + I4751*
$0.70 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Electric Heat w/o Cooling, Existing Insulation R-12 to R-19
I3714 + I4752*
$0.70 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Natural Gas Heat w/ Cooling, Existing Insulation R-20 to R-38 I5167 + I4749*
$0.55 per sq. ft. of attic area improved
I5168 + I4750*
$0.55 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Natural Gas Heat w/o Cooling, Existing Insulation R-20 to R-38
Air Sealing and Attic Insulation, Electric Heat w/ Cooling, Existing Insulation R-20 to R-38
I5169 + I4751*
$0.55 per sq. ft. of attic area improved
Air Sealing and Attic Insulation, Electric Heat w/o Cooling, Existing Insulation R-20 to R-38 I5170 + I4752*
$0.55 per sq. ft. of attic area improved
*Supplemental data sheet needed.
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