A Rudhra Solar air-source heat pump on the terrace of a modern home beside a pool at dusk

AIR-SOURCE HEAT PUMPS

24/7 Hot Water.A Fraction ofthe Electricity.

Continuous hot-water comfort with advanced air-source heat pump technology, designed for significantly lower electricity consumption.

Conventional electric heater

100%

electricity consumption (reference)

Rudhra heat pump

25%

electricity consumption for the same heat

Illustrative — at COP 4.0. Actual results depend on the model's COP and site conditions.

Explore Heat Pump Models

24/7 hot water
Lower electricity use
Reliable performance
Suitable for diverse applications

02WHAT IS A HEAT PUMP?

Smarter Heat.Remarkably Less Energy.

An air-source heat pump moves heat instead of making it. A refrigerant absorbs heat from the surrounding air, a compressor raises its temperature, and a heat exchanger passes that heat to your water. An electric heater turns each unit of electricity into one unit of heat; a heat pump delivers several units of heat for each unit it uses.

Rudhra Solar heat pumps come in domestic and commercial ranges and work with insulated storage, so hot water is ready when you need it.

Higher efficiency
Rated COP of 3.8 to 4.06 across the range: about 4 units of heat per unit of electricity.
Lower running costs
Less electricity for the same hot water means lower electricity bills.
Reliable hot water
Day and night, in any weather, within its rated −7 to 45 °C ambient range.

03SELECT YOUR HEAT PUMP

One Technology.Different Requirements.

For homes, villas and apartments, with a built-in circulation pump.

Rudhra Solar domestic air-source heat pump with a front fan and side service panel

Select a model

Model RSHP-D-3.8

Heating capacity: 3.8 kW
Hot-water production: 106 L/h
Coefficient of Performance (COP): 3.88
Rated / max power input: 0.98 / 1.27 kW
Electrical supply: 220 V / 50 Hz / 1 ph
Refrigerant: R410A
Maximum outlet water temperature: 60 °C
Working ambient temperature: −7 to 45 °C

Model page

04HOW IT WORKS

Heat from Air.Delivered to Water.

1Absorb. A fan draws outdoor air over the evaporator, where refrigerant absorbs its heat.
2Compress. The compressor raises the refrigerant's pressure and temperature.
3Transfer. In the condenser the refrigerant releases that heat into your water.
4Repeat. The expansion valve lowers the pressure and the cycle starts again.

Diagram of an air-source heat pump water heater: fans draw ambient air through the evaporator, the compressor raises the refrigerant temperature, the condenser passes heat to water, and a circulation pump moves hot water to an insulated storage tank that supplies the taps — Schematic, not to scale; tap to enlarge.

05ENERGY SAVINGS

See What EfficiencyCould Save.

Use our calculator to compare estimated electricity use and running costs for your own hot-water demand, tariff and the model's rated COP.

Open Savings Calculator

Illustrative comparison

Same hot-water output

Electric heater100%

Heat pump(at COP 4.0)25%

At COP 4.0 compared with electric resistance heating at about COP 1.0, for the same delivered heat. Rudhra models are rated at COP 3.80 to 4.06. Actual energy use and cost savings depend on the model, ambient temperature, inlet and outlet water temperatures, daily demand and your electricity tariff.

06REAL INSTALLATIONS