How Much Can Replacement Windows Save?
Replacement windows are the most popular home improvement project in the
nation today. Yet nearly half of the windows in America are single-pane
windows, and most all of the other half is uncoated double-pane windows. What
this says is that most of America's homes are wasting natural resources and
spending money for heating and cooling. These homes are literally "throwing
money out the window".
The
Rocky Mountain Institute's Home Energy Briefs #1 Building Envelope reported on
a study in Madison Wisconsin about heating cost with various kinds of windows.
The study reported that a single pane window had a heating cost of $356. The
cost associated with a double pane window was only $178. Even more amazing is
the finding that double pane windows with low-e coating and exterior storm
panels had an associated heating cost of only $100.
Several window manufacturers and various studies by building associations and
government agencies indicate that windows are the primary point of heat or air
conditioning loss in the home. Replacement windows can save 25-50% of the
energy needed to heat and cool a home. No wonder window replacement is the
most popular home improvement project in the nation today.
What
are the main things you need to know about
replacement windows before you
buy? Here are a few facts and figures:
§
Double pane
windows are twice as effective as single pane windows in reducing heat
exchange. They also help to keep out noise.
§
Double pane
windows with Argon gas are twice as effective as a plain double pane window in
keeping out both heat/cold and noise.
§
Double pane
windows with Krypton gas are about 20% more effective than windows with Argon.
§
Triple pane
windows with Argon in each chamber are 50% more effective than double pane
windows with Krypton
§
Triple pane
windows with Krypton are 250% more effective than plain double pane windows.
§
Adding the
low-e (low emissivity) coating will allow light to pass through but reduce
heat loss due to radiation by 40-70%
§
The main
drawback of triple pane windows is their weight and difficulty in
installation. A double pane window with low-e coating is as effective as a
triple pane window
§
Double and
triple pane windows can be made with an operable shade or blind inside the
window. These options can also increase the insulation value of the windows.
If
you are replacing your windows, talk with your window provider about the
options offered by various window manufacturers. By comparing costs, features
and benefits, you will be able to choose the right window for your needs. When
the job is done, you can sit back in greater comfort and know you are saving
both money and energy.
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