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Structural Insulated Panels (SIPs); 6.5" wall panels and 10.5" roof panels |
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Large thermal heat sink consisting of 3' sandbed under concrete slab |
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Super-insulated precast foundation walls |
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Passive and active solar systems |
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Conditioned Area (sq. ft.) |
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2690 |
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2690 |
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Housing Type (single family, multi-family, attached, detached, etc.) |
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SF/Detached |
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SF/Detached |
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Foundation Walls |
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R-20 |
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N/A |
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Walls |
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R-25, SIP |
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R-22.5, SIP |
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Vaulted Ceiling |
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R-42, SIP |
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R-42, SIP |
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Space Heating (primary only) |
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Solar/Propane Hydronic Radiant |
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Solar/Propane Hydronic Radiant |
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Efficiency (HSPF, COP, etc.) |
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83% for backup system |
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83% for backup system |
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Efficiency (SEER, EER) |
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N/A |
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N/A |
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Water Heating |
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Solar/Propane
On-Demand |
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Solar/Propane
On-Demand |
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Efficiency (EF) |
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83% for backup system |
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83% for backup system |
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Flow Rate |
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150 cfm |
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131 cfm |
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Infiltration Rate |
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5 ACH50 |
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0.4 ACH50 |
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Solar Thermal (DHW, space heating, etc.) |
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DHW, Space Heating |
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DHW, Space Heating |
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Lighting & Appliances |
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$1579 |
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26/$1522 |
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Photovoltalics |
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$0 |
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-34.7/-$2031 |
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