A.O. Smith HPI heat pump water heaters extract heat from the air — delivering 3.5 units of hot water for every 1 unit of electricity. The average Bengaluru household saves ₹1,000–1,500 per month after switching.
A conventional electric geyser converts 1 unit of electricity into 1 unit of heat — that's a COP of 1.0. An A.O. Smith HPI heat pump moves heat from the surrounding air into the water tank, achieving a COP of 3.5. The same electricity produces 3.5× more hot water.
Bengaluru's climate (ambient temperature 18–35°C year-round) is ideal for heat pump operation. The HPI runs in efficiency mode over 95% of the year.
The go-to model for 3–5 person households. Runs in efficiency mode (460W input, 1750W output) for daily hot water needs. Hybrid turbo mode available for peak demand. AES smart scheduling minimises thermal loss.
The larger variant for 5–8 person households or homes with high simultaneous hot water demand. Same COP 3.5 efficiency as HPI 40, with a 30L larger tank to handle peak usage without running short.
A hybrid heat pump with 300L capacity for large villas, farmhouses, and small hospitality setups. Handles high simultaneous demand with a hybrid operating mode for peak supply, while maintaining everyday efficiency.
Air-to-water heat pump with a split outdoor unit and 450L tank. Designed for apartment complexes, guest houses, clinics, and commercial premises. High output with consistent efficiency across operating hours.
Higher-powered 3HP variant of the CAHP for larger commercial deployments. Faster recovery time, suitable for hotels, clinics, large apartment blocks, and educational institutions with continuous hot water demand.
High-output modular heat pump system with 500L storage for large-scale commercial and institutional installations. Dual outdoor unit configuration for redundancy and continuous supply even during maintenance.
Adjust the sliders to estimate your monthly savings. Based on Bengaluru domestic electricity tariff (₹6.5/unit) and average geyser usage.
All HPI models use the same heat pump core. The main difference is tank size and heat output. Our engineer will recommend the right model during the free home assessment.
| Feature | HPI 40 — 150L | HPI 50 — 180L ★ | HPA 80 — 300L ★ | CAHP — 450L | MC — 500L |
|---|---|---|---|---|---|
| Tank capacity | 150 L | 180 L | 300 L | 450 L | 500 L |
| COP (efficiency) | 3.8 | 4.2 | 4.2 | 4.2 | 4.2 |
| Hybrid turbo mode | ✓ | ✓ | ✓ | ✓ | ✓ |
| Ideal household | 3–5 persons | 5–8 persons | 5-8 persons / villa | Villa / commercial | Large commercial |
| Unit type | Integrated | Integrated | Split | Split | Split · dual |
| 3-yr service contract | ✓ | ✓ | ✓ | ✓ | ✓ |
"The heat pump was recommended by Nirmala and it's been brilliant. Our electricity bill dropped by over ₹1,200 a month. Paid for itself faster than we expected. Professional installation."
"Got the HPI 40 installed 8 months ago. Before, our geyser was running ₹1,800/month. Now it's under ₹500. The team explained everything clearly and the unit runs silently."
Free site assessment · right-sized recommendation · 3-year service available