Shopping for new windows can turn into a blur of similar-looking spec sheets fast. This ENERGY STAR window checklist breaks down exactly what to check before you buy, so you can compare options quickly without missing the details that actually matter.
According to the Department of Energy, heat and cold transfer through outdated windows accounts for 25 to 30 percent of a home’s HVAC costs, which is exactly what a properly rated, well-installed window is designed to fix. Our energy-efficient window solutions meet these ENERGY STAR standards across every style.
Check the ENERGY STAR Label
Start by confirming the window actually carries the ENERGY STAR label for your specific climate zone, not just a general “energy efficient” marketing claim. The label means the window has met third-party tested performance criteria, not just a manufacturer’s own claims.
Compare U-Factor Ratings
U-factor measures how well a window prevents heat from escaping. Lower numbers mean better insulation. Look for the whole-unit U-factor rather than a center-of-glass number, whole-unit ratings account for the frame too, and that’s what actually determines real-world performance. Our professional window installation services ensure your window’s rated U-factor holds up once installed, and for a deeper explanation of how these ratings work, see our Window Energy Ratings Explained guide.
Compare SHGC Ratings
Solar Heat Gain Coefficient (SHGC) measures how much solar heat passes through the window. In Salt Lake City’s climate, a moderate SHGC generally strikes the best balance, low enough to reduce summer overheating, without blocking so much winter sun that you lose free passive heating. Ask your installer what SHGC range makes sense for the specific direction your windows face.
Ask About Warranty & Installation
A high rating on paper doesn’t matter much if the installation is poor. Ask specifically what the warranty covers, materials, labor, or both, and for how long, and confirm the installer has experience with the exact window line you’re buying. Explore our window replacement services in Salt Lake City services for a clear answer on both fronts.
Your Quick Reference Checklist
Before you commit to a window, confirm you can check off each of these:
- ENERGY STAR certified for your climate zone, not just “energy efficient” marketing language
- Whole-unit U-factor, not just center-of-glass numbers
- SHGC rating appropriate for your window’s sun exposure
- Written warranty covering both materials and labor
- An installer with specific experience on the window line you’re buying
Ready to shop for ENERGY STAR windows with confidence? Schedule a free consultation with our Salt Lake City team for a free quote.