Section 5-3 Conserving Energy 125
Single-pane windows,
which are on nearly half
of all U.S. homes, are big
energy wasters. They should
be covered with storm
windows or replaced with
double-pane windows of
high-performance glass. In
cold climates, gas-fi lled panes
with “low-e” coatings reduce
heat loss. In warm climates,
windows should have one or
more coatings that block the
sun’s rays.
Another way to better
insulate a dwelling is through
landscaping. Use trees,
shrubs, and vines to help
shield a home from sun,
wind, and noise, 5-9.
Water Heating
After the climate-control appliances, the single biggest energy user
in the home is the water heater. It averages about 15 percent of the home’s
energy budget. Water-heating bills can be cut by using more energy-
effi cient appliances and less hot water.
There are several easy ways to cut back on hot water. Taking quick
showers instead of baths and using aerating showerheads are two ways.
Running the dishwasher and clothes washer only when loads are full is
another. Insulating the hot water storage tank and fi rst six feet of pipes
saves energy, too. You can also lower the temperature setting of your
water heater so less energy is needed to heat the water. Lowering it to
120°F should provide enough hot water for most families.
Using cooler water whenever possible spares the water heater from
heating more water. For example, hot water is a must for washing dishes,
but not for cleaning most loads of laundry. Cold and warm water are
often effective for most clothes washer cycles. Cold water is appropriate
for rinsing all types of laundry. Heavily soiled laundry, however, needs
hot-water washes to get clean.
Homes with heated pools use considerable energy, perhaps doubling
their water-heating bill. Because few households own pool heaters and
pumps, they are not fi gured into the national averages.
5-9
Trees and foundation
plantings help insulate a
home against heat, cold,
and wind.