If you’re considering window replacements in Tulsa, Broken Arrow, Claremore, or surrounding areas, you’ve likely come across the terms “thermal windows” and “ENERGY STAR® windows.”
While they may sound similar, they’re not the same—and knowing the difference can protect your investment, lower your utility bills, and improve home comfort.
At SRI Energy, we help Northeast Oklahoma homeowners choose verified, high-performance windows—not just marketing gimmicks.
ENERGY STAR® certified windows always include an NFRC label (from the National Fenestration Rating Council). This means the window has been independently tested to meet strict energy efficiency standards.
👉 Pro Tip: No NFRC label = not ENERGY STAR®. Always ask to see it!
ALT TEXT: ENERGY STAR NFRC window label showing verified energy performance ratings
Upgrading your windows is an investment. ENERGY STAR® windows provide:
✅ Verified energy performance
✅ Independent third-party testing
✅ Improved insulation for Oklahoma’s weather extremes
In contrast, “thermal windows” are often just branded products with no standardized rating.
Don’t let the jargon stop you. Here’s what to focus on:
| Rating | What It Means | Best For Oklahoma |
|---|---|---|
| U-Factor | Measures heat retention in winter | Lower is better (more insulation) |
| SHGC | Solar Heat Gain Coefficient: summer heat blocking | Lower is better for hot summers |
| Air Leakage | Air escaping around the window frame | Lower = tighter seal |
| R-Value | Resistance to heat flow (inverse of U-Factor) | Higher is better |
Quick Tip: Prioritize windows with a low U-Factor and SHGC for Tulsa’s hot summers and cold winters.
ENERGY STAR® windows deliver more than just performance ratings:
Lower energy bills year-round
More consistent indoor temperatures
Noise reduction
Increased resale value
May qualify for rebates or tax credits
Need help with rebates? We’ll guide you through PSO and ONG incentive programs.
✅ Certified ENERGY STAR® window offerings
✅ BPI Certified Building Scientists on staff
✅ Transparent pricing and expert consultation
✅ Financing options available
✅ Specialists in weatherization and insulation
We don’t just sell windows—we help improve your whole home’s performance.
Don’t waste another month paying high utility bills due to old, drafty windows.
👉 Request Your Free Assessment with SRI Energy
📞 Call us at (918) 633-1003
📍 Serving Tulsa, Claremore, and Northeast Oklahoma
Q: Are thermal windows the same as ENERGY STAR® windows?
A: No. ENERGY STAR® windows must have an NFRC label. “Thermal” is a marketing term and doesn’t guarantee tested efficiency.
Q: What window ratings should I focus on?
A: U-Factor, SHGC, and Air Leakage. Look for low values in all three for maximum performance in Oklahoma’s climate.
Q: Are ENERGY STAR® windows worth the cost?
A: Yes! They reduce energy bills, improve comfort, and may qualify for rebates or tax incentives.
Q: How does SRI Energy help?
A: We offer ENERGY STAR® windows, personalized consultations, and rebate support. We understand Oklahoma homes and climate challenges.
