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11-24-14-R
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TCAAP Energy Integration Resiliency Framework <br />Policy White Paper – Energy Efficiency Strategies (Demand-Side Management) <br /> 35 <br />energy vision, TCAAP may wish to develop homes that are above these minimum energy standards. <br />Below are five low-cost standards that could be required for all low-density residential developments. <br />Each has a near-term or mid-term payback. <br /> Passive Ventilation Design: Operable windows on east and west walls <br /> Combined Hot Water and Heating System: 95% efficiency for both outputs <br /> Energy-Efficiency Lighting: 100% of permanent lamps to be energy efficient <br /> Hard-Wired Programmable Thermostat: Allows a homeowner a non-battery powered option <br /> Solar-Ready Roof: Structurally suited with at least one roof slope facing west, south, or <br />southwest <br />While not suitable for all homes on the site, select clusters of homes or a whole neighborhood could be <br />elected to pioneer groundbreaking efficiency design standards. To do this, the JDA may ask developers <br />to meet more advanced energy design guidelines in select TCAAP areas (e.g. 5% of the residential area <br />or a specific neighborhood or development). The following strategies could reduce the thermal energy <br />load by 60% to 80%.7 8 Combined with cost-effective renewable heating technologies, this would allow <br />a home or group of homes to entirely avoid reliance on natural gas. On average, avoiding this <br />connection would save developers a one-time fee of $500 to $1,000 or more per house.9 If the JDA <br />seeks a third-party design guideline for developers, it is recommended that the guideline include these <br />cost-effective standards and prioritize them for any model energy homes. <br /> Low-Load Envelope: Wall insulation R-28 or better, ceiling insulation R-55 or better, slab R- <br />value 10 or better; Equivalent would be a house with a space heating EUI of less than 6 <br />KBTU/SF/year <br /> Passive Solar Design: Proper orientation, massing, and building transparency to maximize <br />solar heat gain; transparent façade to face south or within 30 degrees <br /> Heat Pump: Install a ground source or air source heat pump sized to cover all heating and <br />cooling loads year round, with electric resistance heating as back-up system (replaces the <br />need for a combined hot water and heating system) <br /> <br /> <br />7 http://www.mncee.org/getattachment/623786cd-c32f-4ba7-80fc-b229f1fa8a37/ <br />8 http://apps1.eere.energy.gov/buildings/publications/pdfs/building_america/29236.pdf <br />9 https://www.xcelenergy.com/staticfiles/xe/Marketing/Files/MN-Service-Guide.pdf
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