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Property Listing
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Property address: 18750 Cooper Road
Nevada City, California
95959
USA
Map Location
Selling Price (USD): $939,000
Living area (Sq. Ft.): 4136
Number of Bedrooms: 3
Number of Bathrooms: 4
Lot Size: 5.08 acres
Year Built: 1999
Monthly Utility Cost (USD): $6/month - PG&E Electric
some propane every year or two; wood optional
Property Web Site: www.CharlieBrock.com
What makes it Green:
This is a big and comfortable house that requires very little energy beyond what it produces itself!
PASSIVE SOLAR DESIGN with 3 components:
1. Letting the sunlight in / keeping the sunlight out: At approximately 40 degrees North Latitude,
the southern orientation and proper overhangs make this easy.
2. The "envelope": R-25 walls and R-40 ceilings of Structural Insulated Panels (SIP), with supplemental
fiberglass insulation and Triple-glazed windows make this a VERY "tight" house. SIPs are made of
recycled materials.
3. Thermal Mass: With 16,000 gallons of water in the Indoor Lap-Pool and lots of concrete on the
Lower Level and with hydronic heating in the slate/tile floors above, this house has plenty of
mass to retain its warmth in winter and its cool in summer.
ENERGY PRODUCTION:
1. Electricity: The 9 kw photovoltaic array is part of the slate roofing system. Through its
PG&E Time-of-Use meter, the house "sells" energy back to the Utility Grid at Peak Rates
(between noon and 6 PM) and consumes energy mostly at Off-Peak Rates. For the privilege of
being connected to the utility grid and treating it as a very deep supplemental "battery bank"
by trading energy in this way, the Pacific Gas & Electric Company (PG&E) bill is less than $6/month!
2. Heat Energy: 18 Roof-Top Solar Hot Water Panels drain back into a 350-gallon tank.
From this tank, all heating needs can be served: interior space heating through the
hydronic system in the floors; domestic water heating mostly through the thermo-siphon
effect; the swimming pool and the spa through heat exchangers built into the tank.
If the sun does not shine, an outdoor wood-burning stove with its own 170-gallon water
jacket exchanges heat into the larger tank in the house to serve all heating needs.
No sun? No wood in the outdoor stove? Propane from the twin 1000-gallon tanks (owned) backs it all up!
Garage-Carport: Yes
Garage-Carport Type: Garage-Attached
Number of Cars: 3
Garage Area (Sq. Ft.): 820
Heating: Passive solar, hydronic radiant floor heat by solar, wood-stove or propane.
Cooling: Passive cooling can be aided by whole-house fan.
Energy Source: PG&E Utility Grid; 9 kw photovoltaic (PV) on roof slates;
48-volt battery bank; 20 kw generator; hot water by solar or
outdoor wood-burning stove, and/or propane.
Water Source: 15-gpm well with solar pump & A/C pump, 3000-gallons
in storage tanks; 16,000-gallon indoor swimming pool serves as source for
fire-suppression sprinklers, hoses and hydrant.
Windows: Metal-clad wood with Triple-Glazing.
Insulation: Structural Insulated Panels (SIP) from recycled materials:
6-inch walls R-25 and 10-inch ceilings R-40.
Seller Contact Info:
Name: Charlie Brock - Realtor®
Address: 855 Sutton Way
City: Grass Valley
State: CA
Zip Code: 95945
Country: USA
Phone: 530.273.6982
Fax: 530.273.6982
E-Mail:
Click here to contact
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