Example Job “Double Hung Windows, Front Door, & Vinyl Siding Updates”
Seabrook, NH | March 2023
Questions? Call (603) 476-3236
Posted In Energy Efficient Windows, Resources
Published June 14, 2015
We want to help you keep your home’s interior winter heat or summer cool inside. The best way to do this is to arm yourself with knowledge about what protects your home for heat transfer/loss.
Heat transfer is expressed with U-values. Here’s a couple of quick and useful definitions:
For more of an explanation on R- and U-values, visit http://www.thegreenage.co.uk/article/thermal-conductivity-r-values-and-u-values-simplified/.
Windows lose and gain heat four ways: conduction, convection, radiation, and air leakage.
Conduction is the movement of heat through a solid material. If you hold a metal rod over a fire, you’ll run the risk of burning your hand as the rod conducts heat. Heat can pass through a window this way. A less conductive material helps to impede heat flow. This is why we offer multiple-glazed windows that trap low-conductance gas (like argon) between multiple panes of glass. This limits the conduction through the largest volume of the window. We also offer thermally resistant edge spacers and additional components help to reduce conduction.
Convection is another way that heat moves through windows. In a cold climate, heated indoor air rubs against the interior surface of window glass. The air cools, becomes more dense and drops toward the floor. As the stream of air drops, warm air rushes in to take its place at the glass surface. The cycle, a convective loop, is self-perpetuating. You recognize this movement as a cold draft and turn up the heat. Each 1°F increase in thermostat setting increases energy use 2%. Multiple panes of glass separated by low-conductance gas fillings and warm edge spacers, combined with thermally resistant frames, raise inboard glass temperatures, slow convection, and improve comfort.
Radiant transfer is the movement of heat as long-wave heat energy from a warmer body to a cooler body. Radiant transfer is the warm feeling on your face when you stand near a wood stove. Conversely, your face feels cool when it radiates its heat to a cold sheet of window glass. But radiant-heat loss is more than a perception. Clear glass absorbs heat and re-radiates it outdoors. Radiant-heat loss through windows can be greatly reduced by placing low-E coatings on glass that reflect specific wavelengths of energy. In the same way, low-E coatings keep the summer heat out.
Air leakage siphons about half of an average home’s heating and cooling energy to the outdoors. Air leakage through windows is responsible for much of this loss. Well-designed windows have durable weatherstripping and high-quality closing devices that effectively block air leakage. Hinged windows such as casements and awnings clamp more tightly against weatherstripping than do double-hung windows. But the difference is slight; well-made double hung windows can greatly limit air leakage. Craftsmanship and installation will also affect air leakage. The installed components must have tight connections. Windows with certified air-leakage rates of less than 0.30 cfm/ft2 are considered energy efficient. The lower the value, the better.
Hopefully this information is useful! More questions? Feel free to contact us. Our sales professionals are happy to help you. Here at The Window Source, we’ll bring you the best solutions for your replacement window needs. We serve all of Massachusetts, New Hampshire, and Maine.
Your Local Window & Door Installers
Are you thinking of replacing the windows in your home? We want to be your window installers.
Get your free quote today.
Window Source NH
Seabrook, NH | March 2023
Double Hung - Casement - Bow & Bay - Sliding / Pocket - Colonial Grid - & More
Get A Free Estimate Now
Front Entry Doors - French Doors - Sliding Patio Doors
Learn More About Our Professional Door Installation
Update Your Home's Vinyl Siding Today
Here at Window Source NH we proudly service communities throughout New Hampshire, Massachusetts, and Maine. If you are looking for a window installation company to service your New England home, you found us! Some specific areas we serve are listed below.
For a more complete list, please visit our service areas page. If you don't see your city on the list, don't worry! We work all over New Hampshire, Massachusetts, and Maine and would love to take your phone call.
Double Hung Windows
Series 6000 starting @ $499 installed. We offer the industry's highest quality and value replacement windows available. Whether you need one or three dozen, our professional crew will often offer same day installation.
Sliding Patio Doors
At The Window Source we offer replacement doors for your home. Whether you need front or a sliding patio doors for your home, then call the window and door installation professionals at The Window Source.
5 Star Professional Installation
Our customers consistently give us five star ratings because we are professional, care about your time & space, and ensure that your home gets the best product installation available in the industry.
Please feel free to ask us questions or get an estimate. You can call us at (603) 476-3236 or use the form below. We will get back to you in a timely manner.
Get in touch with us to claim our latest offers and get your free quote.