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04-13-15-R
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4/13/2015 1:58:39 PM
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TCAAP Energy Integration Resiliency Framework <br />Energy Efficiency Strategies <br /> <br /> <br /> 64 <br />conservation, and edible landscapes. All of the single family homes sold out quickly and all home <br />buyers opted to install solar PV systems. <br />Low Load Housing Development | Townsend, Massachusetts <br />A premiere example of low-load homes being built at scale is the 35 single-family houses on <br />Coppersmith Way in Townsend, MA. These homes, each 1,700 square feet, were built to meet a strict <br />efficiency standard with an additional cost of approximately $8.40 per square foot (incorporating a <br />$4,550 Massachusetts rebate).11 The resulting thermal load was served by two efficient “mini-split” <br />systems – one on each floor – and homes continue to be reported by residents as a comfortable and <br />responsive living environment. <br />Carbon Zero Residential Development | Issaquah, Washington <br />At a built cost of about $375,000 each, the 10 townhome development outside of Seattle (started in <br />2008) sold out completely within the first year with homebuyers showing a willingness to pay $20 to <br />$40 more per square foot than less efficient homes of similar size and location.12 The neighborhood, <br />similar to what is being proposed at TCAAP, successfully utilized a community-based ground source <br />system in combination with in-home heat pumps. The shared walls between townhomes contributed <br />to reduced heating loads that made it financially viable. The builder/developer attests that the visible <br />elements of the net zero energy homes, such as the in-floor radiant heating, heat pump technology, <br />roof-top solar, and triple pane windows were key to the value that homebuyers saw. The developer <br />(Ichijo U.S.A.) continuous to build low-load homes and sees ROI that makes sense in the market. <br />Ground Source Heat Pump Housing Development | Kennewick, Washington <br />SouthCliffe is a 400+ lot residential development in southeastern Washington that is comprised of low- <br />load homes serviced by a ground source water loop and heat pumps, very similar to what is being <br />proposed at TCAAP. Heating and hot water needs of each home are both serviced by this combination <br />of technologies. The ground source water loop added approximately 5% to the cost of each lot, but led <br />to immediate monthly energy cost savings. Milo Bauder and Grant Young were the developers of this <br />project, and have worked with ThermLink in Duluth: a pioneer in ground source installations and <br />equipment.13 <br /> <br />11 Homes achieved a HERS score of 40. The exterior walls were built to R-46, the basement walls were R-20, the attic was insulated to R- <br />63 and the under basement slab was insulated with 2 inches of rigid foam with an R-value of 10. <br />12 Conversation with Nick Neid, project manager with Ichijo USA, the developer and builder (February 2015) <br />13 http://www.distinctiveprop.com/files/files/soiuthcliffepressrelease.pdf
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