House
Type |
1,699
square foot, 2-story house with unfinished basement. |
Ceiling |
R-40
Insulation |
Walls |
R-23
Insulation |
Foundation
Walls |
R-15
Insulation full 8' height on foundation wall. Or, R-19
insulation on unfinished basement ceiling. |
Windows |
Greater
than R-2.5 overall, such as dbl pane vinyl with "low
E" coating. |
Air
Leakage |
Less
than .34 natural air changes per hour as verified by a
blower door test; fully weatherstripped; completely caulked
joints and cracks; sealed attic bypasses (i.e., wiring
and plumbing penetrations, attic hatch and area around
chimneys all airtight); dampers on all vents; and outside
combustion air ducted in for space- and water-heating
appliances, fireplaces, and wood burning stoves. |
House
Ventilation |
Heat-recovery
ventilation (HVR). |
Solar
Gain |
At
least 50 square feet of south-facing windows that are
unshaded in winter, preferably with mass for heat storage. |
Water
Heater |
Insulated
with additional R-5 or greater; low-flow (2.5 gpm or less)
showerheads and faucets; and first 10 feet of hot and
cold water pipes off tank insulated with closed-cell foam. |
Space
Heating |
87%
AFUE "sealed combustion" or "power-vented"
low-mass(less than 4 gal. boiler water content) boiler,
or a "sealed-combustion" gas furnace with an
AFUE of 90% or higher, or an efficient electrical ground
source heat pump. |
Distribution |
Furnace
ducts in unheated basement sealed with mastic and insulated
to R-6. |
Lighting |
80%
hard-wired fluorescent lighting fixtures in high use areas. |
Devices |
Automatic
set-back thermostat on each heating zone: zoning in houses
with boiler system. |
Refrigerator |
Energy
efficient refrigerator. |
Clothes
Washer |
Horizontal-axis
washer. |
