“Energy-efficient” gets used a lot in the window business — but what actually makes a window efficient, and why does it matter in East Tennessee’s hot summers and cool winters? Here’s what to know before you buy.
Low-E glass
Low-emissivity (Low-E) coatings are microscopically thin layers that reflect heat. In summer they bounce the sun’s heat away; in winter they keep your heat inside. They also block UV rays that fade floors and furniture.
Argon gas fill
The space between panes is filled with argon, a harmless gas that insulates far better than plain air. It slows heat transfer, so your home stays more comfortable and your HVAC works less.
Double vs. triple pane
Double-pane windows are the standard for efficiency and value. Triple-pane adds another layer of glass and gas for the best insulation and sound control — a great upgrade for noisy streets or maximum savings.
ENERGY STAR ratings
ENERGY STAR–rated windows meet strict efficiency standards for our climate zone. Choosing rated products means real, verified performance — and they may qualify for federal energy tax credits.
What it means for your bills
Together, these features reduce drafts and heat transfer, which means lower energy bills, fewer hot and cold spots, and a quieter, more comfortable home year-round.
Ready to upgrade? Learn about our energy-efficient window replacement across Knoxville and East Tennessee.