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ENVIROGUARD double hung window

LoĒ³-366 Glass

EnviroGuard LoĒ³-366 windows have the ultimate performance glass. It just might make all other low-e glass obsolete. LoĒ³-366 delivers the ideal balance of solar control and high visibility. And it provides the highest levels of year-round comfort and energy savings. It’s also the one glass you can use to be compliant in every ENERGY STAR zone – in a double-pane window. Its low SHGC makes it compliant throughout the rest of the country as well. It’s the perfect glass wherever you live.

Beats the heat. Keeps the view.

When the temperature soars, ordinary window glass just can’t handle the heat. And tinted glass spoils the view. EnviroGuard LoĒ³-366 windows, however, has been specially formulated to reject the sun’s heat without affecting the view. It lets more light in and keeps more heat out. So your home stays cool and comfortable. Our patented LoĒ³-366 coating provides the ultimate in performance of all our LoĒ products. What’s more, LoĒ³-366 provides exceptional fading protection as well. It blocks 95% of the sun’s damaging ultraviolet rays (a leading cause of fading), so it will help your furniture, carpets, curtains and wall coverings stay beautiful for years to come.

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  • Partnership
  • Warranty
  • Performance
  • Energy Savings
  • Temperatures

Our proud partnership with Cardinal Glass Industries


EnviroGuard Window Warranty:

  1. • Glass seal failure (20 years)*
  2. • PVC components (25 years)*

enviroguard cellular pvc window technology



EnviroGuard Window WARRANTY

Want to see the complete details of the ENVIROGUARD™ Window Warranty? Download the PDF file now.

*see warranty for complete details and restrictions.





Take a look at these performance numbers.

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ENERGY STAR, everywhere.

The goal of the ENERGY STAR Windows program is to be better than code. LoĒ³-366 is the one low-E product that can qualify in all 4 climate zones: superior insulating value in the north, and clear solar control for everywhere else in the country.

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Inside glass and outside temperatures

The table below compares the room-side center of glass temperatures of different glass types against two different winter conditions.

The superior insulating capability of LoĒ³-366 is a key factor in the construction of comfortable windows for cold climates. The dramatic comfort improvement from windows with warm glass surfaces also means the relative humidity of the indoor air can be controlled and maintained properly. Proper humidity levels (not too much, not too little) will improve comfort and promote a healthier living environment.

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Standard Paint Colors

The following eleven swatches represent the most popular, most requested pre-finished paint colors. These are the colors that we keep in stock, pre-mixed, and ready to go upon order. We also offer premium colors and custom color matching.

cashmere ivory wicker
Cashmere Ivory Wicker
clay sandstone Forest Green
Clay Sandstone Forest Green
sable white KC Black
Sable White KC Black
Universal Brown bronze  
Universal Brown Bronze  

The colors shown are intended to represent the actual paint colors available and may not be an exact match. Please request a swatch book for exact color matching.

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