Window Energy Savings...By the Numbers

Most of you are of the impression that replacing your windows is the first thing you must do in order to saving on your energy bill. Hundreds of millions of dollars have been spent over the past 40 years by window manufacturers and they have been successful in their plight to make you believe their products are the end all, be all to lower your power bill.

Contrary to popular belief, the numbers actually say otherwise.

The average homeowner in North Carolina spends approximately $1800/year on their electric and gas/oil bill combined. With that said, it estimated by the Department of Energy that in our state heating and cooling bills account for 43% of one's whole energy bill.

Average North Carolina Yearly Electric/Gas Bill..................$1800.00
43% of Bill Covering Heating and Cooling..............................$774.00

Now, let's say, in the most generous of terms, that a replacement window could save you 30% on your heating and cooling bill. This is key, because a lot of window companies make promises on overall energy savings, not just the heating and cooling portion of the bill. Obviously, windows are going to have no effect on lighting, electronics, your water heater, or the laundry you do. So to accurately weigh how effective a window replacement will have on your bill, we must only count the portion that is directly affected by the project.

Now back to the savings....if you save 30% on your heating and cooling bill that would bring your yearly savings to a paltry number. See below how it works out:

Yearly Heating and Cooling Bill................................................. $774.00
30% of Heating and Cooling Bill................................................ $232.00

So, in the best case scenario, you might save $232.00.

The average home in the U.S. has 17 windows, and if you take an average price of $500.00 (believe me, they can be twice that) let's see what that does to the cost of a whole house window replacement:

17 Window Units @ $500.00 each................................................$8500.00
Average Yearly Energy Savings........................................................$232.00
Number of Years to Payback Original Investment........................36.6 years

Almost 37 years to pay back the average replacement window job...and the average homeowner lives in their home for 7.5 years. Just think...that is 7x longer than what it takes to pay off a brand new car! What sense does that make? Not much, if you understand how money works.

We are probably the only contractor in the Piedmont Triad to tell you this and lay the numbers out this way, but if you understood our business model you would know that our credibility comes from tried-and-true methods supported by building science modeling. We aim to give you unbiased customized solutions that hone in on the root cause of your energy loss and not just the symptom.