Glass Selection Tool
Should you go single, double (DGU) or triple glazing — and which glass? Pick your climate, priority and sun exposure for an honest recommendation with target SHGC/VLT. Indicative India 2026 guidance; confirm specs with your glazier.
Your situation
Fierce summer sun; heat gain is the enemy. SHGC = solar heat let in (lower = cooler); VLT = visible light let in (higher = brighter). Indicative India 2026 ranges — your glazier confirms the final spec.
Recommended glazing
Double (DGU) glazing
Suitability 0/10 for this climate & priority
Glass type
Solar-control + Low-E DGU (high-performance coating)
Target SHGC
0.25–0.35
solar heat gain
Target VLT
0.50–0.65 (keep daylight high)
daylight let in
Suitability by layers (0–10)
- In hot India the win is a LOW SHGC coating — it rejects solar heat, not just air-conditioning loss.
- Keep VLT reasonably high so you still get daylight and don't switch on lights all day.
- On a west wall, pair the coated glass with external shading or a deep overhang.
India-honest note: Triple glazing is usually OVERKILL in hot India — the gain over a good Low-E DGU is tiny, but it's heavier, dearer and harder to source. Spend that money on a better coating and external shading instead.
Spec windows for your home, not a brochure
DesignAI matches glazing, glass type and SHGC/VLT to your room, climate and budget.
Related Guides — Deep-dive reading
Best Windows for Indian Climate: A Zone-by-Zone Selector
Match window type, frame material, glass, and shading to your climate zone — hot-dry, coastal, composite, temperate, or hill
Windows & GlazingTriple Glazed Windows Explained (India): Is It Overkill for Our Climate?
Three panes, two gaps, the best U-value going — but in hot India the real win is Low-E and low SHGC, not a third sheet of glass. An honest deep-dive.
Windows & GlazingTypes of Glass for Home Windows in India (2026): The Complete Guide
Clear, toughened, laminated, Low-E, reflective, DGU and smart glass compared on heat, light, safety, sound and cost, with a how-to-choose framework
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