100% Veteran Owned American Flag

For a Free Estimate or Proposal Call 850.432.0865

Serving the Gulf Coast Since 1974

Energy Efficient Glass Windows Installed by Lee’s Glass

energy efficient glass windows

Energy efficient glass windows and doors installed by Lee’s Glass & Window Works lower our customers’ power bills and increase protection from our climate. That’s why we insist our custom replacements carry the Energy Star seal of approval for the Southeast. Hire Lee’s Glass today and begin racking up your energy savings.

What is Energy Star?  

Energy Star began as a voluntary program created by the U.S Environmental Protection Agency in 1992. The program reduces greenhouse gas emissions that harm our climate by promoting energy efficient products to consumers. The first Energy Star tested and approved products included computers and monitors. Today, it covers hundreds of products.

Additionally, through EPA’s partnerships with about 18,000 private- and public-sector organizations, Energy Star successfully delivered businesses and individuals energy cost savings reaching $24 billion in one year alone!

Performance Ratings of Windows, Doors and Skylights

Objective energy performance ratings of windows, doors and skylights must be independently tested and certified by the National Fenestration Rating Council. This third party, non-profit organization allows consumers to compare performance ratings and make informed purchases. This council sets minimum performance standards. In contrast, Energy Star distinguishes the level of quality of all energy efficient windows, doors and skylights.


U-factor measures the rate of heat transfer and tells you how well the window insulates your home. The value generally ranges from 0.25 to 1.25. A lower value indicates better window insulation.

Solar Heat Gain Coefficient (SHGC)

The SHGC measures the fraction of transmitted solar energy into your glass windows and doors. The value tells you how well the product blocks heat caused by the sun.

Visible Transmittance

Measured on a scale of 0 to 1, visible transmittance registers the amount of light the glass window or door permits. These values usually range from .20 to .80. The higher the visible transmittance, the more light shines through.

Air Leakage

The rate at which air passes through joints a window or a glass door becomes significant when evaluating energy efficiency. Most industry standards and building codes require and air leakage value of 0.3. The lower the value, the less air leakage.

Condensation Meter 

As we mentioned in our previous blogs, condensation signals the seal on your glass windows or doors have stopped being effective. If the sealing fails, it creates less energy efficient glass windows and doors. The condensation meter measures how well a glass window or door resists water build up on a scale from 0 to 100. The higher the condensation resistance factor, the less water build up occurs.

Trust Lee’s Glass to Install Energy Efficient Glass Windows and Doors!

Lee’s Glass & Window Works installs energy efficient glass windows and doors individually tested and approved by Energy Star — the preeminent rating system. Contact Lee’s Glass today for a free estimate and proposal!

"Lee’s Glass replaced drafty 26 year old windows with PGT Vinyl WinGuard 500 Series Impact Resistant, Low E Windows. Wow, what a difference! Not only did they help update the look of my home, the windows have saved me a lot of money on my bill."
- David