If Double Pane Uncoated Windows Are Replaced with Triple Pane Windows with Argon Gas and a Low-E Coating, the Payback Period is Typically around 100 Years
New York City, New York – According to a recent finding published in the Buildings Energy Data Book, buildings consume approximately 40% of the nation’s energy. Approximately 56% of this energy is used for space heating and cooling as well as lighting applications, while 25% to 35% of this energy is wasted due to inefficient windows.
All of these factors are directly by the building envelope. In addition to other functions, successful building envelopes shield occupants from outside weather conditions, whether that be excessively hot temperatures in the summer or extremely cold temperatures in the winter, as well as provide a connection to the outside in terms of natural lighting and views.
One of the major challenges facing homeowners is the high capital cost associated with installing window upgrades. The cost of replacing all the windows in a residential building can be substantial. However, the energy savings associated with replacing windows with their higher efficiency counterparts is typically relatively small.
The payback period for replacing single pane windows with double pane windows can be as long as 50 years for cold climates. This payback period will also increases as the quality of the existing window increases. When double pane uncoated windows are replaced with triple pane windows with argon fill and a low-e coating, the payback period is typically around 100 years for cold climates.
Therefore, for most homeowners it is necessary to determine alternative, lower-cost methods of reducing heat flow through their windows.
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