75% to 99%
of space heating
100%
or more of air conditioning
$1,900
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75% to 99%
of space heating
100%
or more of air conditioning
$1,900
Property
- Type:
- Residential
- Address:
- 31 East Street, Northfield, MA 01360
- Size:
- 1,500 sq ft
- Energy need met:
- 75% to 99% of space heating
- 100% or more of air conditioning
- Designations:
- Zero net energy
- Event Participation:
- NESEA Green Buildings Open House 2012 Host
- NESEA Green Buildings Open House 2013 Host
Technology
- Type:
- High Efficiency HVAC
- Size of System:
- 0.75 tons
- Purposes:
- For space heating
- For air-conditioning
Financial Details
- Gross Cost of System:
- $2,900
- Value of Tax Credits:
- $1,000
- Net Cost of System:
- $1,900
- Additional Financial Notes:
- Electricity Use: net zero Components: 2 kW BP PV array with Sunny Boy 1800 Ground Mount, 22 tube Apricus evacuated tube solar thermal
Professionals & Suppliers
- Products:
- Fujitsu
- Builders:
- Peter Talmage, Eric Brazeau
What You Need to Know
Description:
Heat Recovery Ventilation 5.4 Kw PV system currently supplies excess electricity. Three 4x8 solar hot collectors supply almost 100% of hot water needs and some space heating. A 35 square foot hot air collector helps heat the house. Walls are being improved to R-30+ with exterior insulation. Open house plan allows daylighting that eliminates any daytime need of electric lights. Window Quilts are used during all seasons to keep the house comfortable, warm in winter and cool in summer. Interior thermopane inserts are being added to raise the insulating value of windows to R 4.85. The renovation of this 200 year old cape included moving it to a new insulated foundation, installing a new high efficiency heating system, replacing the windows and doors, adding insulation and Window Quilts, a heat recovery ventilator, installing a PV array and a solar hot water system. The overall energy consumption was reduced by over 50%. An ongoing project is adding foam insulation to the exterior to further decrease the heat loss. Our PV array is now up to 5.4 kW which supplies twice the electricity needed to run the house as well the the electricity to heat the house with the mini split heat pump.
Maintenance Requirements:
The filters on the heat pump interior unit must be cleaned regularly.
Efficiency or Sustainability Improvements:
Daylighting, Passive solar, Super Insulated Walls/ Roof
My Motivation:
A very strong desire to eliminate non renewable energy use
Open House Info:
Going North on Rt. 10-63 in Northfield, turn Right on Maple Street. Go 1/4 mile to East St. on the Left. House is 1/4 mile on Right with PV array. Going South on Rt. 10-63, turn Left onto Maple Street.
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