What Are the Best Windows to Keep the Heat Out?
- Longhorn Windows
- 5 hours ago
- 4 min read
If your home feels harder to cool each summer, your windows may be part of the problem. Rising energy bills, warm rooms, and strong sunlight through the glass often signal inefficient windows.
If your air conditioner runs constantly but certain rooms still feel warm…
If you avoid sitting near certain windows during the afternoon…
Or if your summer electric bill keeps climbing despite normal usage…
Your windows may be allowing excess solar heat into your home.
In hot climates like Texas — especially in Houston — managing indoor heat gain is critical for comfort and energy savings.
Many homeowners begin searching for the best windows to keep the heat out when cooling costs spike. Modern energy efficient windows reduce heat transfer, block UV rays, and improve insulation.
In this guide, we’ll explain what makes windows heat-resistant, which features matter most, and which window types perform best in warm climates.
During your consultation, we’ll evaluate your current windows, assess sun exposure and insulation performance, and provide clear recommendations for reducing heat gain — no pressure, just practical guidance.
*Looking to reduce cooling costs in Fort Bend County? Read our guide on Window Replacement in Sugar Land: How to Lower Energy Bills Year-Round.
What Makes a Window Energy Efficient?
The best windows to keep the heat out share a few key features:
Low-E Glass
Low-emissivity coatings reflect infrared heat while allowing natural light inside. This reduces solar heat gain without darkening your home.
Double-Pane Construction
Energy efficient double pane windows use two layers of glass with an insulated space between them. This slows heat transfer and improves comfort.
Gas Fills
Many energy efficient replacement windows include argon gas between panes to improve insulation.
Low SHGC Ratings
The Solar Heat Gain Coefficient (SHGC) measures how much heat enters through the glass.
When comparing options, focus on these performance features rather than marketing claims.
Best Window Types to Keep the Heat Out
If your goal is heat control, these window types perform best:
Double-Pane Windows
A practical and effective solution for most homes. When paired with Low-E coatings and gas fills, they significantly reduce heat transfer.
Low-E Glass Windows
These are particularly important in sunny climates. They block UV rays and reflect solar heat.
Vinyl Frame Windows
Energy efficient vinyl windows provide strong insulation and resist moisture. They also reduce heat transfer better than older aluminum frames.
Casement Windows
Casement windows seal tightly when closed, which helps limit air leakage and improve efficiency.
Most homeowners choose double-pane glass with Low-E coatings and insulated frames. This combination offers strong performance at a fair price.
*Concerned about rising cooling costs? Learn how Longhorn Windows Helps You Save on Energy Bills.
The Best Windows for Hot Climates Like Houston
In the Houston area, managing solar heat gain is one of the most important factors when selecting replacement windows. Southeast Texas' prolonged cooling seasons and high humidity levels make it especially important.
In Houston, effective energy efficient windows should include:
Low SHGC ratings to reduce solar heat gain
Low-E glass for UV protection
Double-pane construction with insulated spacing
Moisture-resistant frames
Houston energy efficient windows help reduce strain on air conditioning systems and maintain more consistent indoor temperatures. Proper installation is also critical in humid conditions to prevent air leaks and seal failure.
Do Energy Efficient Windows Actually Reduce Cooling Costs?
Energy efficient replacement windows can reduce cooling costs in many homes.
Replacing single-pane windows may lower energy use by 10–25%, depending on the home and climate. Results vary based on installation quality and overall insulation.
Homeowners often notice:
More consistent indoor temperatures
Fewer hot spots near windows
Less glare
Reduced strain on HVAC systems
Improved noise reduction
Energy efficiency improves both comfort and long-term performance.
*To better understand how sealed and insulated windows block heat, read Behind the Glass: How Insulated and Sealed Windows Work (And Why ENERGY STAR® Certification Matters).
Struggling with high cooling bills?
A quick in-home evaluation can identify how much heat your current windows are allowing in —
and what high-performance replacements could change.
No obligation. Just clear answers.
Signs It’s Time to Replace Your Windows
If you are unsure whether replacement is necessary, look for these warning signs:
Drafts near window frames
Condensation between glass panes
Rooms that feel noticeably warmer
Fading floors or furniture from UV exposure
Windows that are difficult to open or close
These issues often indicate failing seals or outdated glass technology.
Upgrading to modern energy-efficient windows can address these concerns and improve overall performance.
Choosing the Right Energy Efficient Windows for Your Home
Selecting the best windows to keep the heat out depends on:
Climate – Hot regions benefit from low SHGC ratings and strong UV protection.
Performance vs. Cost – Higher-performance windows may cost more upfront but deliver better long-term savings.
Installation Quality – Even high-performance glass will underperform if installers fail to seal it correctly.
In high-sun exposure homes, selecting the right SHGC rating can significantly impact indoor comfort during peak summer months. Focus on performance ratings, durable materials, and professional installation.
*For homeowners in Pearland, don’t miss our guide on The Energy Savings of Window Replacement in Pearland.
Upgrade to Energy Efficient Windows with Longhorn Windows
If your home struggles to stay cool during summer, upgrading to modern energy efficient windows can significantly improve comfort.
Longhorn Windows installs high-performance window systems designed for Texas heat and humidity. We help homeowners compare energy efficient window options and choose solutions that reduce heat gain and improve insulation.
Schedule a consultation to determine the best windows to keep the heat out of your home.
Improve Comfort with the Best Windows to Keep the Heat Out
If your home feels warm despite constant air conditioning, your windows may be contributing to the problem.
Modern energy efficient windows use insulated panes, durable frames, and specialized coatings to reduce heat transfer and improve comfort.
Upgrading to the best windows to keep the heat out can lower cooling costs and improve indoor comfort.
Schedule a consultation to find the right energy-efficient solution for your home.
During your consultation, we’ll evaluate your existing windows, review performance ratings, and explain your options clearly — so you can make an informed decision without pressure.
*Want better insulation without sacrificing style? Discover Energy-Efficient Casement Windows: Stay Stylish & Save.
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