Much has been written about how energy efficient replacement windows can help keep your home warmer and more comfortable when winter temperatures plummet. But did you know that the same technology that keeps you toasty can also help to maintain a cooler and drier home when summer’s heat arrives?
Replacement windows like Rescom’s Bristol® windows are designed to create a thermal barrier to reduce the transfer of energy from your home to the outside. That helps retain warm air inside when outdoor temperatures are cold.
But the thermal barrier also works in the opposite direction, serving to prevent outside energy – in the form of heat or cold – from infiltrating into your home.
When the summer sun shines through your windows it can quickly heat up a room – or an entire home. But windows that can reflect the sun’s energy help to better regulate indoor temperatures, keeping your home cooler. If you have central air conditioning, a ductless cooling system, or even a window air conditioner, thermally efficient windows can help reduce the strain on the system and reduce the energy needed to keep you cool and comfortable.
The “secret” to this improved window performance is a combination of tightly-fitted, rigid frames and insulating glass. These factors can actually be measured, and they are, by the National Fenestration Rating Council (NFRC), an independent laboratory.
The NFRC tests replacement windows (and doors) and assigns ratings for several performance factors. You can find the ratings on a label affixed to new replacement windows. (If the windows you are considering purchasing do not have an NFRC label, look elsewhere! Trustworthy window manufacturers all submit their windows for NFRC testing.)
To gauge the energy-efficiency of a window, look for two key performance indicators: the U-factor and the solar heat gain co-efficient. The U-factor indicates a window’s overall insulating value; the solar heat gain co-efficient measures how well a window deflects incoming solar heat. An efficient window should be rated at 0.30 or below in both measurements.
The most efficient replacement windows feature glass with “low emissivity” (Low-E) coatings. Low-E glass has a microscopic, transparent coating that reflects infrared energy, or heat. These coatings were developed to minimize the amount of ultraviolet and infrared light that can pass through glass without compromising the amount of visible light that’s transmitted. So light is allowed in, but heat and UV rays are reflected.
Want to learn more about how energy-efficient replacement windows can keep you cool all summer long? Call Rescom Windows at (866) 410-5884 to schedule a free, in-home consultation on our low maintenance, energy efficient replacement windows.