Low-E Coating
A microscopically thin metallic oxide coating on window glass that reflects infrared heat while letting visible light through.
Quick answer
Low-E Coating: A microscopically thin metallic oxide coating on window glass that reflects infrared heat while letting visible light through. Typical cost: Usually included; $20–$50 per window upcharge if not standard..
Why it matters
Low-E is the single biggest efficiency upgrade in modern windows — and is standard on virtually all ENERGY STAR–rated products.
Typical cost
Usually included; $20–$50 per window upcharge if not standard.
Pros
- • Cuts solar heat gain 30–50%
- • Standard on ENERGY STAR windows
Cons
- • Slight light tint
- • Different coatings tuned for cold vs hot climates
Common uses
- • Every modern double- or triple-pane window
Alternatives
Window film retrofit
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Frequently asked questions
- Which low-E coating do I need?
- Soft-coat low-E for cold climates; harder solar-control low-E for hot climates.
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