How Low-E Glass Works
Window replacement guidance for Southern California homeowners.
Last reviewed: September 2026. Verify codes, manufacturer specs, and rebates before acting.
Low-emissivity (Low-E) coatings are microscopically thin layers applied to glass that reflect infrared heat while allowing visible light to pass through.
In summer, Low-E keeps heat out; in winter, it keeps heat in. The result is more consistent indoor temperatures and reduced strain on your HVAC.
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