Window Energy Savings Calculator
Compare standard glazing against Low-E or DGU windows and see the cooling energy and rupees you save each year — plus how fast the upgrade pays for itself. Indicative India 2026 physics; confirm with a local energy audit.
Your windows
Model: avoided solar heat gain = area × ΔSHGC × irradiance × cooling hours, plus a small U-value conduction term; converted to electricity at AC COP ≈ 3. Indicative — orientation, shading and glass specs shift the real number.
Annual cooling energy saved
0 kWh
≈ ₹9,310 off your bill every year · cuts window cooling load 64%
Annual ₹ saved
₹9,310
10-year savings
₹93,099
Upgrade premium
₹18,000
≈ over single glazing
Payback
1.9 yrs
on the premium
Annual window cooling cost
Specify the right glass for your climate
DesignAI picks glazing — SHGC, U-value and orientation — to keep your home cool and your bills low.
Related Guides — Deep-dive reading
Energy-Efficient Glass Guide (India): Cut Your Cooling Bill at the Window
How double glazing, Low-E coatings, argon, low SHGC and low U-value combine to slash the AC load
Windows & GlazingBest Glass for Hot Indian Climates (2026): Beating 45-Degree Heat at the Window
Which window glass keeps the daylight but stops the heat in Delhi, Rajasthan, Telangana and the hot plains, by orientation, budget and payback.
Windows & GlazingNet-Zero Home Windows in India
The role of windows in a net-zero-energy home — the Passive House spec, and an honest hot-India verdict on what actually pays
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