Where? Stow, MA
When? 2010
What? Almost Passivhaus, almost net-zero energy, 2.5 floors and a basement 30′x22′ interior dimensions. 6.9 KW PV installation
Who?
- Architect: Kraus Fitch, Amherst MA
- Builder: Transformations Inc, Townsend MA
- Passive House Energy Modeling: DEAP Group, Newton MA
- House Monitoring: Fraunhofer CSE, Cambridge MA
- IAQ monitoring; Plug-in-load monitoring: Lawrence Berkeley National Laboratory, Berkeley CA
Metrics/Testing:
HERS Index: 9 (though I have noticed the size of the PV array and some of the insulation levels are wrong in the report, so probably lower)
Energy-Star-Homes: Tier III (June 2, 2010)
PHPP: “Specific Primary Energy Demand” 36.8 kBTU/sqft/yr
Blower Door: 180 CFM50. 0.71 ACH50 (using PassivHaus volume) 0.50 ACH50 (HERS volume)
Climate — HDD: ~7300 base 68 for Worcester MA
Actual 1 year results (6/2010-5/2011): 10,000 KWh site energy used. 8,300 KWh site energy produced. 1,700 KWh net used.
For more information, please read the details at our NESEA listing here and posts marked GREEN here at this blog.
