Windows are a source of natural ventilation. However, keeping them open on a hot summer’s day may not be the best idea. The summer breeze gives the illusion that fresh air is cooling your home when in actuality it’s letting in warm air. During hot days, it’s best to keep your window closed when temperatures are high (provided your home is adequately insulated) and to keep them open in the evening or at night.
When Is It Okay to Open Windows?
As a general rule, you should only open windows when outdoor temperatures are lower than indoor temperatures. During summer, this is mostly applicable at night.
How to Keep Indoor Temperatures at a Comfortable Level
Make sure your attic has adequate insulation – Insulation helps keep indoor temperatures at a comfortable level by keeping cool air inside during summer and preventing heat from escaping in winter.
Check your windows for drafts – According to the Department of Energy, heat gain and loss through windows account for 25% to 30% of residential heating and cooling costs. This figure is expected to be higher if you have drafty windows. What are the warning signs you have drafty windows? A higher-than-expected energy bill, foggy window glass and rattling sounds are some of the warning signs you need to keep an eye out for in your home.
Install energy-efficient windows – While looking for energy-efficient windows, look for the ENERGY STAR® label. Only windows that have met the U.S. Environmental Protection Agency’s stringent performance standards have this label. Installing ENERGY STAR certified windows can lower households’ electricity bills by roughly 12% nationwide.
If you’re planning on replacing your old windows, Renewal by Andersen® offers a wide variety of energy-efficient windows, from casement windows to double-hung replacement windows. Our most energy-efficient windows are made from Fibrex®, an exclusive wood-and-vinyl composite with excellent insulative capabilities, and are equipped with High Performance™Low-E4® glass, our most energy-efficient glass option.
Want to learn more about our energy-efficient windows?