In the chart below, various types of materials used
to produce windows are compared for energy loss
in BTU's per hour.**
Vinyl is among the best materials in the world for
providing thermal efficiency in your home.

**Ratings found in Heating, Ventilating, & Air Conditioning Guide, of American Society of Heating,
Refrigerating, and Air Conditioning Engineers.

To learn the difference between PVC and uPVC, click here.

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