This page explains energy efficient windows price ranges, DGU vs Low-E glass, thermal break technology, and AC bill savings in simple language — so you can understand estimates without confusion. Our website is for information only — we want to give you a clear picture, so making decisions is simple. Prices are market references — actual costs depend on specifications.
💰 Energy Efficient Windows Price Range (Reference Only)
₹800 – ₹1,500 per sq.ft
Price varies based on specifications (DGU, Low-E coating, thermal break, profile series, installation type, location & transport)
In India's hot climate, AC bills account for a significant portion of household electricity bills. Energy efficient windows (DGU, Low-E glass, thermal break) can reduce AC bills by 20-30% — especially beneficial in cities like Hyderabad, Mumbai, Delhi, and Bangalore.
Understanding Energy Loss Through Windows
Traditional single-pane windows are major sources of heat gain during summer and heat loss during winter. In India, the primary concern is heat gain, which forces your AC to work harder. Energy-efficient windows address this problem through advanced glass technology and frame design.
Heat Transfer Comparison
Annual Savings for a typical 3BHK home in India
Plus better comfort and reduced noise pollution
Types of Energy-Efficient Windows
Double Glazed Units (DGU)
Two panes with air gap reduce heat transfer by 40-50%. See DGU windows and slim profile windows with DGU options.
Low-E Glass Coating
Reflects heat while allowing visible light through
Thermal Break Frames
Insulating barrier prevents heat conduction
1. Double Glazed Units (DGU)
DGU windows feature two panes of glass with an air or gas-filled gap between them. This design significantly reduces heat transfer:
- 🔹 Reduces heat gain by 40-50% compared to single-pane windows
- 🔹 Improves thermal insulation
- 🔹 Reduces noise by 30-40 dB
- 🔹 Prevents condensation
2. Low-E Glass Coating
Low-emissivity (Low-E) glass has a special coating that reflects heat while allowing visible light to pass through. This is ideal for Indian homes facing direct sunlight.
3. Thermal Break Aluminium Frames
Thermal break technology uses insulating materials to separate interior and exterior frame parts, preventing heat conduction through metal frames.
What Factors Affect the Price?
The price of energy efficient windows depends on several factors. If you need a clear estimate, it's important to understand these factors:
- Glass Type: Single glass (₹400-600/sqft), DGU (₹800-1,200/sqft), DGU with Low-E (₹1,000-1,400/sqft), Triple-pane (₹1,400-1,800/sqft)
- Low-E Coating: Standard DGU (₹800-1,200/sqft), DGU with Low-E (+₹200-300/sqft)
- Thermal Break: Standard frame (base), Thermal break frame (+₹100-200/sqft)
- Profile Series: 50mm (₹600-900/sqft), Slim Profile (₹900-1,400/sqft)
- Air Gap Size: 6mm (standard), 12mm (enhanced), 16mm (maximum) — larger gap = better insulation
- Installation Type: Professional installation (5-10% of total cost) with proper sealing
- Location & Transport: Hyderabad, Mumbai, Delhi NCR, Bangalore — transport costs vary by location
Real Example Calculation
Example — If you install energy efficient windows for 200 sq.ft window area:
- Total Area: 200 sq.ft
- DGU with Low-E Coating: ₹1,000-1,200/sqft
- Total Cost: 200 × ₹1,100 (average) = ₹2,20,000
- Standard Single Glass Cost: 200 × ₹500 = ₹1,00,000
- Additional Investment: ₹2,20,000 - ₹1,00,000 = ₹1,20,000
- Annual AC Bill Savings: ₹15,000-30,000 (20-30% reduction)
- Payback Period: ₹1,20,000 ÷ ₹22,500 (average savings) = 5.3 years
Note: This price is a reference. Actual cost and savings depend on your location (Hyderabad, Mumbai, etc.), AC usage, and exact specifications.
How Much Can You Save?
Actual savings depend on several factors:
Window Orientation
East & West facing windows benefit most from energy-efficient glass
AC Usage
24/7 AC homes see highest savings up to 30% reduction
Window Area
Larger windows = greater potential savings
City Climate
Delhi, Mumbai, Hyderabad see maximum benefits
Additional Benefits Beyond Cost Savings
More consistent indoor temperatures
30-40 dB external noise reduction
Prevents furniture and flooring fading
Energy-efficient features add value
Reduced carbon footprint
Choosing the Right Energy-Efficient Windows
When selecting energy-efficient windows, consider:
- Glass Type: DGU with Low-E coating for maximum efficiency
- Frame Material: Thermal break aluminium for durability and performance
- Seal Quality: Proper sealing prevents air leaks
- Installation: Professional installation ensures optimal performance
- Warranty: Look for 10-year warranty on glass and frames
Before investing, calculate your potential savings. For a 200 sqft window area with DGU, you can save approximately ₹2,000-3,000 per month in AC costs during peak summer months in cities like Hyderabad, Delhi, or Bangalore.
Return on Investment
While energy-efficient windows have a higher upfront cost (approximately ₹200-300 per sqft more than standard windows), the long-term savings are substantial. For most Indian homes, the additional investment pays for itself within 3-5 years through reduced electricity bills.
Common FAQs
1. How is energy efficient window price calculated?
To calculate price: (Width × Height in sq.ft) × Price per sq.ft. Example: 200 sq.ft window area. If price is ₹1,100/sq.ft (DGU with Low-E), then total = 200 × ₹1,100 = ₹2,20,000. Glass upgrades, thermal break, profile series, and installation costs are added to this.
2. DGU vs Low-E glass — which is better?
DGU (Double Glazed Unit) reduces heat transfer by 40-50% and provides thermal insulation — most cost-effective solution. Low-E coating with DGU reduces heat transfer by 30-40% (total 60-70% reduction) — ideal for maximum energy savings. Low-E coating costs +₹200-300/sqft extra, but it's worth it in the long term.
3. How much AC bill savings will there be?
DGU windows provide 20-30% AC bill reduction. Example: If monthly AC bill is ₹10,000, after DGU it will be ₹7,000-8,000 — ₹2,000-3,000 monthly savings. Annual savings ₹24,000-36,000. For 200 sq.ft window area, ₹15,000-30,000 annual savings is possible, depending on AC usage and location.
4. What is thermal break and why is it necessary?
Thermal break is an insulating material that separates interior and exterior frame parts — prevents heat conduction through metal frames. Without thermal break, aluminium frames act as heat conductors. Thermal break costs +₹100-200/sqft extra, but provides 10-15% additional energy savings.
5. What is the payback period?
Energy efficient windows have a payback period of 3-5 years. Example: ₹1,20,000 additional investment, ₹22,500 annual savings = 5.3 years payback. After this, it's pure savings. Significant savings over 20-25 years lifespan — long-term investment is worth it.
6. Is there a price difference in Hyderabad, Mumbai, and Delhi?
Base prices are similar, but transport costs vary by location. Transport costs may be higher in Mumbai and Delhi NCR. You can save on transport costs by purchasing directly from local vendors. Installation costs also vary by location.
Price Calculate Karna Ho To
If you need help understanding prices, discuss with your local vendor. Our website also has a free calculator available — View Free Calculator.
👉 Also read: Soundproof Windows Price Guide | Aluminium Sliding Glass Door Price