Aerogel Insulated Glazing Unit (A-IGU)

Team Members Lawrence Berkeley National Laboratory National Renewable Energy Laboratory Research Triangle Institute

DecemberPI: Wendell 10 thE., 2018Rhine [email protected] Phone: 508 466 3130 PI: Wendell E. Rhine PM : Shannon White [email protected] [email protected] EXPORT CONTROL WARNING ARPA-E –Dec. 10, 2018 Phone: 508 466 3130 Phone: 508 6911 1175 ASPEN AEROGELS, INC.

Approximately 40% of homes in the US still have single pane windows. Problems with single pane windows The Window Debate – Solution to Problem ° Low energy efficiency Replace or Restore ° Energy costs Develop cost-effective aerogel- ° Condensation Single pane windows can be insulated glazing units (A-IGU) that ° Drafts due to air infiltration restored using existing can be used to improve the energy ° Comfort level methods but currently efficiency of single pane windows. ° Soundproofing restoration methods do not include improving their energy Problems with replacement windows efficiency. ° High cost ° Long payback period The Market ° Gas-filled panes may leak >$150 billion retrofit market ° Short lifetime opportunity. ° Do not meet heritage or historic window aesthetic requirements Before After ARPA-E –Dec. 10, 2018 2 ASPEN AEROGELS, INC. Aspen’s Solution • A thin profile aerogel insulated glazing unit (1/4 th inch thick A-IGU) that can replace glass panes to improve energy efficiency of windows at a lower cost than purchasing replacement windows.

glass aerogel glass Replace pane with A-IGU

Intellectual Property ° Processes for making and supercritically drying aerogels to reduce manufacturing costs (<$10/sq.ft.).

ARPA-E –Dec. 10, 2018 3 ASPEN AEROGELS, INC. Aspen’s Product – An energy efficient aerogel insulated glazing unit (A-IGU) • Silica aerogels are one of the best transparent insulation materials known. 1/4 th inch thick pane replacement Triple pane performance in double pane format Retrofit solution New replacement window

Energy efficiency >2 mm aerogel thermal barrier, TC Thickness dependent <14 mW/m-K 12 mm aerogel

2 mm glass panes 2 mm glass panes

Warm edge spacer Warm edge spacer Existing single U-values using low-e glass pane sash U-value U-value Double pane sash Thickness BTU/ft 2 h F W/m 2 K Meets ARPA-E requirement 2 mm 0.37 2.09 R = 7.7 Triple pane performance 12 mm 0.13 0.76 R10 when gap is 18mm thick

ARPA-E –Dec. 10, 2018 4 ASPEN AEROGELS, INC. Market for A-IGUs ° Our market survey indicated that currently there is a limited market for replacing panes in residential single pane windows to improve their energy efficiency. ° This business opportunity involves installing new energy efficient panes in the existing sash of single pane windows so that the window would retain the same aesthetic characteristics as the original window.

Market Road Map Replacement New windows – panes for the Replacement double pane format Skylights panes in single windows - triple pane pane windows performance Entry product Future products

ARPA-E –Dec. 10, 2018 5 ASPEN AEROGELS, INC. Entry Product ° Replacing the panes in single pane windows with energy efficient panes would be a lower cost option than purchasing replacement windows and decrease energy costs for the homeowner.

Advantages of A-IGUs ° The resulting window when combined with a storm window can be as energy efficient as or better than that of new replacement windows. ° Original window is not altered. ° Meets historic window requirements. ° Improves comfort levels. ° Avoids condensation issues. ° Not reliant on gas fill or vacuum. ° Lower cost option than replacement windows. ° Shorter payback period.

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Properties Status ° Met ARPA-E goals for transparency (>80%), ° Designed, developed and tested a new haze (~1%), and U-value (<0.4 BTU/ft 2 h F). process for production of transparent aerogels. ° Modeling studies show that replacing the ° Demonstrated production of aerogels using panes in single pane windows with the A- the new drying process. IGU panes would improve the energy efficiency of the homes. Challenges Total site energy ° Further development is required to refine City reduction (GJ) and scale-up the new process for making A- IGUs that meet transparency, haze, and Houston 11% cost requirements. Minneapolis 19%

ARPA-E –Dec. 10, 2018 7 ASPEN AEROGELS, INC. • Path Forward Follow on funding • Partnership ARPA-e • Joint venture

Refine and Proof of Scale-up optimize Concept Prototype 2 Prototype Manufacturing scale-up Prototype 1 3-4 process 2018 2019 2020 2023 2030 >1 million sq ft/year 4”x 4” Prepare 5 panes 8”x 8” to Develop process Demonstrate simultaneously 24” x 24” compatible with IGU and begin production line production

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Market Collaboration and partners ° Supplier of glass panes, sheets, IGUs (e.g., Cardinal, ° The new A-IGUs would be an opportunity to Pilkington, etc. ). expand the windows industry by offering ° Windows restoration companies retrofit products for the huge number (40%) ° Traditional windows companies for marketing and distribution. of residences and buildings in the U.S. that ° Building materials supply companies. still have single pane windows. ° Joint venture possible after proving technology. Partners Path Forward ° Aspen is seeking a partner or partners ° Partnering with a materials, windows or IGU companies interested in collaborating or forming a joint for distribution. venture to help develop and commercialize ° Leveraging partner’s manufacturing and distribution channels. the technology.

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