Low-E glass plays a critical role in how your home handles summer heat, glare, and UV exposure. Understanding performance ratings helps you choose glass that keeps interiors cooler, brighter, and protected year-round.
Measures how well the window prevents heat transfer. Lower numbers mean better insulation performance.
Indicates how much solar heat passes through the glass. Lower values help reduce summer heat buildup.
Shows how much natural light enters your home. Higher numbers mean brighter interiors.
A microscopically thin metallic layer that reflects heat while allowing natural light to pass through. It helps keep interiors cooler in summer and warmer in winter without darkening your home.
Two or more panes sealed together to reduce heat transfer. The sealed space between the glass improves comfort and increases overall energy efficiency.
Argon gas is placed between panes to slow heat movement more effectively than air. It improves insulation performance without affecting clarity.
Low-E glass uses ultra-thin metallic layers to control heat transfer. It reflects infrared heat away in summer and helps retain warmth in winter, all while allowing natural daylight to pass through. When paired with argon gas fills, it improves year-round comfort, lowers HVAC strain, and increases overall energy efficiency for North Texas homes.
| Glass Type | U-Factor | SHGC | VT | UV Block |
|---|---|---|---|---|
| LoĒ-340 | 0.25 | 0.18 | 39% | 98% |
| LoĒ³-366 | 0.29 | 0.27 | 65% | 95% |
| Quad LoĒ-452² | 0.24 | 0.22 | 70% | 99% |
| LoĒ-i89 | 0.29 | 0.25 | 89% | 86% |
Certified by the NFRC. Browse official database.
Every home experiences different sun exposure, room temperatures, and comfort challenges. That’s why we offer multiple Cardinal LoĒ glass options engineered for North Texas conditions. Whether you need to block harsh summer heat or improve winter insulation, we match the right glass package to your home’s orientation for balanced comfort, clarity, and long-term efficiency.
LoĒ-i89 is a clear interior coating applied to the inside surface of the glass. It enhances insulation performance when paired with LoĒ-366 or LoĒ-452, delivering near triple-pane efficiency in a dual-pane unit.
• Improves U-Factor without reducing visible light
• Reflects interior heat back into the home during winter
• Ideal upgrade for homeowners prioritizing maximum insulation
Engineered for strong south and west sun exposure. Helps keep hot rooms cooler, reduces glare, and protects flooring and furnishings from UV damage.
• High solar heat rejection
• Excellent for west-facing and large exposure windows
• Subtle tint that improves comfort without darkening the room
The most versatile glass package for North Texas homes. Delivers strong summer heat control while maintaining clear, neutral views and comfortable daylight.
• Excellent solar heat rejection for hot climates
• Neutral, clear appearance with no heavy tint
• Blocks up to 95% of damaging UV rays
• Ideal for most standard east, west, and south exposures
Designed for homeowners who want maximum efficiency without sacrificing natural light. Combines low U-Factor insulation with strong solar heat control for superior comfort in demanding exposures.
• Lower U-Factor for improved year-round insulation
• Excellent heat control with bright, natural daylight
• Enhanced UV protection to reduce interior fading
• Premium upgrade for large window walls and high sun exposure homes
Go beyond standard glass with performance upgrades that enhance clarity, comfort, and long-term protection. These premium options help keep your windows cleaner, quieter, and easier to maintain.
An advanced coating activated by sunlight that helps rainwater rinse away dirt and mineral buildup, keeping your windows cleaner with less maintenance.
Engineered with offset glass thickness and acoustic layers to help reduce outside noise while adding strength and security.
Add privacy or style while keeping your home bright. Perfect for baths, entryways, and sidelites.
Cardinal Glass goes beyond surface coatings. From warm-edge spacers to protective films, each component is designed to improve insulation, durability, and long-term performance in real-world conditions.
Engineered to reduce heat transfer around the perimeter of the glass where most energy loss occurs.
• Reduces edge condensation
• Improves overall insulation performance
• Helps extend seal life
• Supports long-term durability
A factory-applied protective layer that shields glass during shipping and installation, ensuring your windows look pristine on day one.
• Protects against scratches and debris
• Removed cleanly after installation
• Helps deliver a spotless final result
• Reinforces installation quality
Low-E glass reflects infrared heat to keep homes cooler in summer and warmer in winter. It filters out UV rays that cause fading while maintaining natural daylight and clear views.
When installed correctly, Low-E windows can lower heating and cooling bills by up to 30%. Our FGIA-certified installation ensures the insulation value you pay for actually performs in real conditions.
Not at all. Today’s advanced coatings, like Cardinal® LoE-366 and LoE-452+, provide excellent heat rejection with a clear, neutral appearance. This means no heavy tinting or mirror effect.
No. Each type of Cardinal® Low-E glass is engineered for specific conditions. For example, LoE-340 blocks intense sun on west-facing windows, while LoE-366 balances year-round comfort. We help you select the right glass package for your home’s exposure and energy goals.
Cardinal’s® Low-E coatings are sealed within the glass unit, protecting them from oxidation and wear. With proper installation and maintenance, your energy performance will last the lifetime of the window.
Upgrade comfort and efficiency with a high-performance glass package on qualifying projects.
Designed to reduce solar heat gain, improve efficiency, and enhance year-round comfort.
Valid on full-home replacements (12 windows or more). Offers cannot be combined.
Availability is limited based on production timelines and installation scheduling.
See how professionally installed, energy-efficient windows improve comfort, appearance, and long-term performance across our service area.
Our certified team is here to help you choose the right windows for your home with honest guidance, no pressure, and expert answers every step of the way.
