“MYTH #10: New Windows = Siginificant Cost Savings
Replacing single pane windows for energy star rated dual pane windows will save energy. That energy savings, however, is a function of the size and number of windows in your home, their orientation and overhangs, and the location of your house and the climate zone you are live in. This typically amounts to a small fraction of your total energy use, and given the expense of replacing windows, there are typically much more cost effective ways to reduce your energy bills.”
Your windows may or may not be inefficient. However, your windows contribution to your power bill is primarily represented within your heating and air units consumption. It speaks to how well sealed your windows are at the seams usually during installation. The other less contributing factor is the radiant heat emitting thru your glass windows. Blinds could be a way to mitigate the radiant heat.
Don’t get me wrong if you are going to buy new windows then go for the energy efficient windows. However, temper your expectations about how much your power bill will go down. If you are being told otherwise then before you spend several thousand dollars on new windows then hire an energy auditor to identify exactly where your inefficiencies are. Well worth the investment.
Let me know if you have any questions.