Free installation + 2-year warranty on every purifier · Installation and service across Mangaluru, Bengaluru and nearby towns · Book a lab test
Heat pump water heaters, about a quarter of the power of a geyser.
A Puryn Heat Pump takes heat from the outdoor air and puts it into your water, the way an AC works in reverse. Our 10 kW model gives 10 kW of heat for 2.5 kW of electricity, so it uses roughly a quarter of the power an electric geyser needs for the same hot water. It heats water to 55°C, up to 60°C, day and night, rain or shine. Sizes run from 100 LPH for a home to 1,100 LPH for hotels and hostels, plus pool heat pumps from 18 to 104 kW. We size it, supply it and install it with the tank, booster pumps and connections.
- 100 to 1,100 litres of hot water an hour
- Hot water up to 60°C
- About 4 units of heat per unit of power (rated)
- Warranty: 2 years heat pump, 3 years tank
- Homes, apartments, hotels, hospitals, pools
- Installed with tank and booster pumps
Size by hot water a day, not by bathrooms alone. A rain shower uses two or three times the water of a normal one, and a bathtub can take 200 litres. We count both before we pick the heat pump and tank.
Heat from the air, not from a heating element
Four steps, running on their own once the controller is set.
Outdoor air
A fan draws air over a copper coil. The refrigerant inside picks up the air's heat.
Compressor
The compressor squeezes the refrigerant, which raises its temperature well above the water's.
Heat exchanger
The hot refrigerant passes its heat to the water through a tube-in-tube or shell-and-coil exchanger.
Storage tank
A circulation pump moves water between the heat pump and an insulated tank until it reaches the set temperature.
Low running cost
About 4 units of heat for every unit of electricity at rated conditions. The calculator below works out your saving.
Hot water day and night
It does not depend on sunlight, so cloudy days and monsoon mornings still get hot water.
No element in the water
Water and electricity never meet. The water is heated by refrigerant through a sealed exchanger.
Works with solar
Already have a solar water heater? A heat pump can share the tank and take over when the sun does not.
What will it cost to run?
Move the sliders to your hot water use and electricity price.
Not sure how much you use? A rough start is 50 litres of hot water a person a day. Rain showers and a bathtub need more.
How it works: heating water from 20°C to 55°C takes 1.163 Wh per litre per degree. An electric geyser turns one unit of electricity into one unit of heat. For the heat pump we use 3.5 units of heat per unit of electricity, below its rated 4 (10 kW of heat from 2.5 kW), to allow for cooler mornings and a hot tank. Your weather, tariff and habits change the real figure.
Which heat pump and tank?
A guide to start from: the heat pump reheats the day's hot water in about four hours. We confirm the size after counting your bathrooms, showers and people at a site visit.
| Where | Hot water a day, about | Heat pump | Tank | Power supply |
|---|---|---|---|---|
| Flat, 1 to 2 bathrooms | Up to 300 litres | 100 LPH | 250 L | Single phase |
| House, 2 to 3 bathrooms | 300 to 500 litres | 150 LPH | 300 to 500 L | Single phase |
| House, 3 to 4 bathrooms | 500 to 800 litres | 220 LPH | 500 to 750 L | Single phase |
| Large home, rain showers, bathtub | 800 to 1,000 litres | 250 LPH | 1,000 L | Single or three phase |
| Hostel, PG, small hotel | 1,000 to 2,000 litres | 280 to 550 LPH | 1,000 to 2,000 L | Three phase |
| Hotel, hospital, large hostel | Above 2,000 litres | 1,100 LPH, or several units | Sized on site | Three phase |
Rain showers need pressure, on both lines
Large hot water tanks are vented, so the water leaves them at very low pressure. For rain showers on the floors below, we fit a booster pump on the hot line and another on the cold line. With pressure on one side only, the mixer cannot hold the temperature and the shower swings hot and cold.
Hard water? Soften it first
Hardness scales the heat exchanger and cuts output over time. Above 200 mg/L, the IS 10500 acceptable limit, fit a water softener before the heat pump. Your lab report tells you.
Puryn Heat Pump specifications
Home and commercial ranges. LPH is litres of hot water an hour at the rated conditions.
Home range
| 100 LPH | 150 LPH | 220 LPH | Large homes250 LPH | |
|---|---|---|---|---|
| Heating capacity | 4 kW | 6 kW | 8.2 kW | 10 kW |
| Power input | 1 kW | 1.5 kW | 2.2 kW | 2.5 kW |
| Power supply | 220 V, single phase | 220 V, single phase | 220 V, single phase | 220 V single phase, or 415 V three phase |
| Compressor | Rotary (Highly / GMCC) | Rotary (Highly / GMCC) | Rotary (Highly / GMCC) | Sealed hermetic (Copeland / Tecumseh) |
| Heat exchanger | Shell and coil | Shell and coil | Shell and coil | Co-axial tube-in-tube |
| Evaporator | 2-row copper coil, aluminium fins | 2-row copper coil, aluminium fins | 2-row copper coil, aluminium fins | 2-row copper coil, aluminium fins |
| Maximum water temperature | 60°C | 60°C | 60°C | 60°C |
| Controls and protection | Digital temperature controller; Danfoss high / low pressure switch | Digital temperature controller; Danfoss high / low pressure switch | Digital temperature controller; Danfoss high / low pressure switch | Digital temperature controller; Danfoss high / low pressure switch |
| Circulation pump | 0.4 HP, 230 V | 0.4 HP, 230 V | 0.4 HP, 230 V | 0.4 HP, 230 V |
| Water pipe size | 3/4 inch | 3/4 inch | 3/4 inch | 1 inch |
| Weight | 68 kg | 75 kg | 98 kg | 120 kg |
| Size (L × B × H) | 860 × 550 × 610 mm | 860 × 550 × 610 mm | 860 × 550 × 610 mm | 860 × 630 × 720 mm |
Commercial range
| 280 LPH | 350 LPH | 550 LPH | 1,100 LPH | |
|---|---|---|---|---|
| Heating capacity | 11.5 kW | 15 kW | 22 kW | 44 kW |
| Power input | 2.8 kW | 3.5 kW | 5.5 kW | 11 kW |
| Power supply | 415 V, three phase | 415 V, three phase | 415 V, three phase | 415 V, three phase |
| Compressor | Scroll (Copeland / Panasonic) | Scroll (Copeland / Panasonic) | Scroll (Copeland / Panasonic) | Scroll (Copeland / Panasonic) |
| Heat exchanger | Co-axial tube-in-tube | Co-axial tube-in-tube | Co-axial tube-in-tube | Co-axial tube-in-tube |
| Evaporator | 2-row copper coil | 3-row copper coil | 4-row copper coil | 4-row copper coil, 2 fans |
| Set / maximum temperature | 55 / 60°C | 55 / 60°C | 55 / 60°C | 55 / 60°C |
| Controls and protection | Digital temperature controller; Danfoss high / low pressure switch | Digital temperature controller; Danfoss high / low pressure switch | Digital temperature controller; Danfoss high / low pressure switch | Digital temperature controller; Danfoss high / low pressure switch |
| Circulation pump | 0.5 HP, 230 V | 0.5 HP, 230 V | 0.5 HP, 230 V | 0.5 HP, 230 V |
| Water pipe size | 1 inch | 1 inch | 1 inch | 1¼ inch |
| Weight | 120 kg | 135 kg | 145 kg | 300 kg |
| Size (L × B × H) | 860 × 630 × 720 mm | 1020 × 630 × 720 mm | 1020 × 670 × 780 mm | 1560 × 935 × 1460 mm |
iHeating capacity vs power input
Heat delivered to the water against electricity drawn. 10 kW from 2.5 kW is a ratio of 4, the reason the running cost is low.
iLPH
Litres of hot water an hour. A 250 LPH unit reheats a 1,000 litre tank in about four hours.
iSplit home systems
Smaller homes can take a split unit with the tank included: 250, 300 or 500 litres, tested at 6 bar.
iTank for soft or RO water
Softened and RO water are low in minerals and attack ordinary tanks. Ask for a stainless steel tank if that is what you will feed it.
Pool heat pumps
Keep a pool warm through the cooler months for a fraction of the cost of electric or diesel heating. Pool models use a titanium heat exchanger that stands up to chlorinated water.
| 18 kW | 27 kW | 45 kW | 52 kW | 104 kW | |
|---|---|---|---|---|---|
| Power input | 3.5 kW | 5.5 kW | 9 kW | 11 kW | 22 kW |
| Power supply | 415 V, three phase | 415 V, three phase | 415 V, three phase | 415 V, three phase | 415 V, three phase |
| Compressor | Scroll (Copeland) | Scroll (Copeland) | Scroll (Copeland) | Scroll (Copeland) × 2 | Scroll (Copeland) × 2 or 4 |
| Heat exchanger | Shell and coil, titanium | Shell and coil, titanium | Shell and coil, titanium | Shell and coil, titanium | Shell and coil, titanium |
| Inlet / outlet | CPVC / PVC | CPVC / PVC | CPVC / PVC | CPVC / PVC | CPVC / PVC |
| Weight | 110 kg | 120 kg | 120 kg | 265 kg | 265 kg |
What you need, and what we do
What to have ready
- Open space with airflowA terrace or open area. The heat pump pulls in outdoor air, so it cannot sit in a closed room.
- A strong base for the tankA full 1,000 litre tank weighs over a tonne. The stand goes over a beam or column.
- Power pointSingle phase up to 220 LPH; 250 LPH either; three phase for the commercial range.
- Water inletCold water from your overhead tank or supply to the hot water tank.
- A drainFor the tank drain and the condensate from the heat pump.
What our technicians do
- Count your bathrooms, showers, bathtub, kitchen and people, and check the site.
- Send a written quotation: heat pump, tank, booster pumps and installation.
- Deliver, lift to the terrace and fix the stand, tank and heat pump.
- Connect the heat pump to the tank with insulated pipes and set the controller.
- Commission it, check the temperature at your taps and hand it over.
Already have a solar water heater or a boiler? A heat pump can work with it as a hybrid, sharing the tank.
Send us your hot water needs
WhatsApp the number of bathrooms, showers (rain showers?), people and your site location. We size the heat pump and tank and send a quotation.
Send the details
Bathrooms, rain showers, bathtub, kitchen, people and the city.
We size it
Heat pump, tank and booster pumps, worked out for your use.
Site visit
We check the space, power and water before you order.
Tell us about your hot water.
Bathrooms, showers, people and the site. We size the heat pump and tank and send a written quotation.
Frequently asked questions
How is a heat pump different from a solar water heater?
A solar heater needs sunlight. A heat pump takes heat from the air, so it gives hot water day and night and through the monsoon. The two can also work together on one tank.
How much electricity does it use?
At rated conditions our 10 kW model delivers 10 kW of heat from 2.5 kW of electricity, about a quarter of what an electric geyser uses for the same water. The calculator on this page works out a monthly figure for your use.
How hot does the water get?
It is normally set to 55°C, and can go up to 60°C.
Single phase or three phase?
The 100, 150 and 220 LPH models run on single phase. The 250 LPH model comes in single or three phase. The commercial range and the pool heat pumps need three phase.
Does it work on cold mornings?
Yes. Output falls a little when the air is cold, so we size with some margin, and the insulated tank keeps the water hot overnight.
Do I need a booster pump?
For rain showers, usually yes. A large hot water tank is vented and gives very little pressure. We fit booster pumps on both the hot and the cold lines so the mixers hold their temperature.
Can it heat a swimming pool?
Yes. Pool heat pumps from 18 to 104 kW use a titanium heat exchanger for chlorinated water.
Does hard water matter?
Yes. Scale on the heat exchanger reduces output. Above 200 mg/L hardness, fit a water softener before the heat pump.
What is the warranty?
2 years on the heat pump and 3 years on the storage tank. Booster pumps carry their manufacturer's warranty.
Who installs and services it?
Our own team in Bengaluru and Mangaluru. Payment is 50% with the order, 25% on delivery and 25% on installation.
How does the lab test work?
You get two lab reports: a pre-treatment report before we recommend anything and a post-treatment report after installation. Both, worth ₹2,000, are included in the price of your system. You pay ₹1,000 when we take the first sample, and it is adjusted when you order. For example, on a ₹65,000 system you pay the remaining ₹64,000.
Guides and related pages
Want hot water that costs less to run?
Send us your bathrooms and site. We size the Puryn Heat Pump and tank and send a written quotation.
