Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use.
On average, low-e storm windows can save you 12%–33% in heating and cooling costs. This equates to $120–$330 in annual savings.

Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use.

On average, low-e storm windows can save you 12%–33% in heating and cooling costs. This equates to $120–$330 in annual savings.