Did you know that your home can be a greater source of pollution than your car? In fact, 16% of U.S. greenhouse gas emissions are generated from the energy used in houses nationwide.
Energy used in our homes often comes from the burning of fossil fuels at power plants, which contributes to smog, acid rain and global warming. Simply put, the less energy we use in our homes, the less air pollution we generate.
According to recent studies conducted by the U.S. Department of Energy windows and doors together account for 70% of your heating load and 46% of your cooling load. Windows may be your home’s biggest cause of energy loss. You lose three times as much energy through the glass in your windows as you lose from leakage around the frames and sash. So, though you conscientiously caulk and weather-strip all your windows, you still will lose energy through them in two other ways:
- Conduction or the direct transmission of heat through your window panes.
- Radiation is the movement of energy through space. Windows store heat and radiate it to the outside, or to the inside, as appropriate.
Blinds and draperies block the sun’s light, but absorb its heat and re-radiate it into the room. This radiant heat input may be 15 times greater than the heat being conducted from the warm outside air.
Clear glass (including double pane/insulating glass) permits almost all of the sun’s radiant heat to enter. Dye only tinted glass absorbs part of this heat and re-radiates it to the outside air. But when it is hot outdoors and there is no breeze to carry away the absorbed heat, the protection from dye only tinted glass drops very low, just when you need it most. Much of this heat movement can be prevented by the use of Energy Saving window films.
The most effective way to manage the amount of unwanted solar heat gain that enters your home is to block it before it gets in. They also reduce the loss of window heat during the summer, easing the operating load on your air conditioning unit.