Researchers have developed windows filled with hydrogel that can block the sun and trap thermal heat for later release
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Low-e coating and glass optical & thermal performances
Gila Heat Control 3-in-1 Adhesive Residential DIY
Window Film: The Solution For Reducing Energy Consumption
Everything You Need to Know About Lighting Gel Sheets - GoKnight
COVERS UP TO 3 STANDARD WINDOWS: 3 ft. x 15 ft. ENERGY EFFICIENT: Rejects up to 72% of total Solar Energy INCREASED COMFORT: Reduces glare up to 72%,
Gila® Heat Control Titanium Adhesive Residential DIY Window Film Sun Blocking Glare Reduction 3ft x 15ft (36in x 180in)
Does Reflective Window Film Really Keep Out the Heat?
Gila® Heat Control Titanium Adhesive Residential DIY
Gila® Heat Control Titanium Adhesive Residential DIY
Water-filled windows use sunlight to heat and cool buildings