Pilots and Programs

Window attachments are a new opportunity for utilities and energy efficiency program administrators to address poor performing building envelope and achieve deeper energy savings for their customers because most U.S. residential and commercial buildings have single and double clear glass windows installed.  Energy efficiency window attachments offer significant energy savings opportunities and non-energy benefits for end-user customers, are widely accessible and available in the marketplace, and can be installed at a lower cost than full window replacement. Field studies have demonstrated have efficient window attachments can achieve up to a 30% reduction in annual heating and cooling energy use, and some products can achieve similar savings to double pane replacements at one third of cost. Window attachments also are energy and performance rated by AERC and ENERGY STAR, and readily deployable in residential, small and large commercial, and multi-family applications.

Program Design Models

Efficient window attachments have the potential to be an effective solution across nearly all building types. The following table includes AERC recommended program design models across different customer and building segments that can incorporate window attachments. AERC can provide utilities and energy efficiency program managers with data on the energy savings and market potential in their service territory, and can assist with developing program or pilot design concepts.   If you are interested in adding window attachments categories to your measure portfolio, contact [email protected] for assistance.

Residential/Multi-familyCommercial BuildingsWeatherization Assistance ‎Programs or Low-Income Energy ‎Efficiency Programs
Downstream incentiveSmall Business Direct InstallAssisted Home Performance
Retail instant discount/MidstreamFacility assessments or retrofitsLow Income Direct Install
Smart Home packagePrescriptive incentives for new ‎constructionPublic Housing Multi-family retrofit
 Whole building retrofit 

Active Window Attachment Incentive Programs

A number of utilities across the U.S have incorporated window attachments into their existing programs and are offering rebates for residential and commercial customers. The following table includes details on utility programs offering incentives for qualifying window attachment products.

ProgramStateProductProgram Delivery ‎Model and SectorIncentiveProduct Eligibility ‎RequirementsRebate ‎Application Link
Xcel Energy COColoradoCellular ShadesDownstream cash ‎rebate (not utility bill ‎credit) for qualifying ‎cellular shades for ‎single family homes‎$1.33 per square ‎foot of qualifying ‎products.‎Products must have an ‎AERC Warm Climate ‎rating of at least 35 ‎and AERC Cool Climate ‎rating of at least 5Rebate Form
Salt River ‎ProjectArizonaShade and ‎Solar Screens ‎Downstream and ‎midstream incentive ‎for residential ‎customers. ‎‎$0.80 per square ‎footShade screens must ‎block at least 80% of ‎the solar heat gain on ‎sun-struck windows ‎only (west-, south- and ‎east-facing windows) ‎that enclose an air ‎conditioned space.Rebate Form
PSEG Long ‎IslandNew YorkInterior and ‎exterior storm ‎windowsDownstream ‎account credit or ‎mail in rebate for ‎residential ‎customers.‎$1.00 per sq. ft. ‎Rebate.Products must be ‎ENERGY STAR ‎certified.Rebate Form
National Grid in ‎Rhode IslandRhode IslandLow-e storm ‎windowsInstant rebate for ‎residential ‎customers‎$25 per window‎Products must be ‎ENERGY STAR ‎certified.Rebate Form
Baltimore Gas ‎and ElectricMarylandSmart ShadesPilot participants ‎received custom ‎rebate based on ‎number of windows ‎in home.Participants can ‎get up to 10 ‎automated window ‎shades for west- ‎and south-facing ‎windowsN/AN/A
Austin EnergyTexasSolar ScreensDownstream ‎MulitfamilyRebate ranges ‎from $2.20 to ‎‎$2.75 per sq ft ‎when SHGC is 0.30 ‎or less for solar ‎screensSolar screens must ‎have a solar heat gain ‎coefficient (SHGC) of ‎‎0.30 or lower.‎Rebate Form
AvistaWashingtonLow-E Strom ‎WindowsDownstream ‎ResidentialStorm windows – ‎‎$3.00 per sq. ft.‎Storm window glazing ‎material emissivity ‎must be less than 0.22 ‎with a solar ‎transmittance greater ‎than 0.55.‎Rebate Form

Technical Reference Manuals and Measure Development

Many utilities rely heavily on state Technical Reference Manuals (TRM) to identify and evaluate new measures and reference a standardized method to calculate energy savings.  AERC is currently involved in efforts to develop measure proposals for window attachments to have these products included in state TRMs across heating, cooling, and mixed climate zones. The following tables provide information on window attachment measures that have been approved in TRMs across the U.S. and measure proposals that are currently under development.  If you are interested in adding window attachments categories to a TRM or have questions about AERC’s efforts please reach out to [email protected] for assistance.



Approved Window Attachment Measures

The following table includes states that have adopted window attachments into to their Technical Reference Manuals (TRMs).‎

StateIECC ZoneIECC ZoneProduct CategoryApplicationPage Number ‎Reference
LouisianaZone 2/3SoutheastLow-E Storm WindowsResidential, Multi-FamilyC-144‎
MissouriZone 4/5‎MidwestLow-E Storm WindowsResidential, Multi-Family‎193‎
New YorkZone 4/5/6‎Mid AtlanticLow-E Storm WindowsResidential, Multi-Family85
ColoradoZone 4/5/6/7‎Rocky Mountain/West‎Low-E Storm WindowsResidential, Multi-Family391
MassachusettsZone 5NortheastLow-E Storm WindowsResidential, Multi-Family 
Rhode IslandZone 5NortheastLow-E Storm WindowsResidential, Multi-FamilyM-310‎
IowaZone 5/6‎MidwestLow-E Storm WindowsResidential, Multi-Family324
VermontZone 5/6NortheastLow-E Storm WindowsResidential, Multi-Family190
MinnesotaZone 6/7MidwestLow-E Storm WindowsResidential, Multi-Family122
IllinoisZone 6/7MidwestLow-E Storm WindowsResidential, Multi-Family359
WisconsinZone 6/7MidwestLow-E Storm WindowsResidential, Multi-Family1054
MichiganZone 6/7MidwestLow-E Storm WindowsResidential, Multi-Family 

Measure Development Efforts

The following table includes AERC’s current measure development efforts. If you are interested in learning more about AERC’s measure development ‎efforts please contact [email protected].

StateIECC ZoneUS RegionProduct CategoryApplication
MaineZone 6/7‎NortheastLow-E Storm WindowsResidential
TexasZone 2/3/4 ‎SouthwestLow-E Storm WindowsResidential
New JerseyZone 4/5/6‎Mid Atlantic ‎Low-E Storm WindowsResidential
ConnecticutZone 5‎NortheastLow-E Storm WindowsResidential
ArkansasZone 3/4‎SoutheastLow-E Storm WindowsResidential
New York‎Zone 4/5/6‎Mid AtlanticSecondary GlazingCommercial
MinnesotaZone 6/7‎MidwestSecondary GlazingCommercial
Rhode ‎IslandZone 5‎NortheastSecondary GlazingCommercial