Devyami

Water Heating Solutions

Heat pump water heating — the same hot water, a fraction of the bill.

Heating water is one of the biggest hidden energy costs in a home or business. A heat pump moves heat from the air into the water instead of making it from electricity, so it delivers the same hot water on a fraction of a geyser’s power — day or night, in any weather. Ours connect over Wi-Fi to schedule around how you live, and we design the storage, the recovery rate and the circulation, not just the heater.

Emergent heat pump outdoor units beside a stainless steel hot water storage tank
3–4×
units of heat for every unit of electricity
70–80%
lower running cost than an electric geyser
24 × 7
day or night, sun or monsoon
Wi-Fi
scheduling and monitoring from your phone

How it works

It moves heat. It does not make it.

That is the whole trick: an electric geyser turns electricity into heat, while a heat pump uses a little electricity to move heat that is already in the air into your water.

  1. 1

    It takes heat from the air

    A fan draws outdoor air across the evaporator, where a refrigerant soaks up its heat — even when the air feels cool to you.

  2. 2

    The compressor concentrates it

    Compressing the refrigerant raises its temperature well above what the water needs.

  3. 3

    The heat goes into the water

    In the heat exchanger that heat passes into the water, and the cooled refrigerant goes round again.

  4. 4

    The tank stores it, hot

    A built-in circulation pump loops water between the heat pump and the storage tank; sensors at the top and bottom keep it at the temperature you set.

Diagram: the heat pump sends hot water to the top of a storage tank and draws cooler water back from the bottom through its built-in circulation pump; temperature sensors at the top and bottom of the tank are wired back to the heat pump; cold water enters at the bottom and hot water leaves from the top
The heat pump and its storage tank: hot water in at the top, cooler water back from the bottom, a sensor at each end.

Why a heat pump

Efficient, all year, and smart

A fraction of the electricity

A geyser turns one unit of electricity into one unit of heat. A heat pump delivers three to four. For a family of five in Gujarat at ₹8/kWh, that is about ₹1,100 a month saved.

Day, night and monsoon

It heats from the air, not the sun, so it works at night and through cloudy weeks. In winter it keeps going with less output — we size it for January water.

Smart, on your phone

Dynamic heating modes and Wi-Fi scheduling: heat when you use hot water, rest when you do not, and see it working from anywhere.

Storage that fits the load

Multiple storage options — a tank sized to a family, or external storage sized to a hotel’s morning rush.

Hot at the tap, fast

Pair it with a monitored circulation loop and hot water reaches every tap in seconds, without a pump running all day.

Homes to hotels

The same heat pump serves a villa, an apartment block, a hostel, a factory’s process water or a swimming pool.

Smart Heat Pumps

One heat pump, from homes to hotels

Domestic or commercial, it is the same smart heat pump — what changes is the storage and how it is sized.

Homes, villas and apartments

A heat pump with its storage tank, sized to the family and scheduled around mornings and evenings — the same baths, on a fraction of the bill.

  • Sized to the household
  • Scheduled from your phone
  • Replaces the bathroom geysers

Hotels, hostels, industry and pools

External-storage set-ups sized to the daily hot water load — where a bank of geysers runs up the biggest electricity bill, a heat pump saves the most.

  • External storage for peak demand
  • Process and pool heating
  • Monitored from one dashboard

Compare

Heat pump, solar or an electric geyser?

Heat pumpSolar water heaterElectric geyser
Electricity for the same hot waterLow — 3 to 4 units of heat per unitNone on a sunny day; backup when cloudyHighest — one unit of heat per unit
Night and monsoonWorksNeeds its backup heaterWorks
SpaceOutdoor unit and a tankRoof area for the collectorsCompact, on the bathroom wall
Best forMost homes, and every large loadSunny roofs with space to spareSmall, occasional loads

Also available: solar and electric water heaters

Where they suit the site better — a sunny roof with room to spare, or a single bathroom’s small load.

Solar Water Heaters

Solar Water Heaters

Solar water heating panels, with hybrid setups that fall back to conventional heating when the sun doesn't cooperate.

Electric Water Heaters

Electric Water Heaters

Dependable conventional electric water heaters in a range of sizes for domestic use.

Heat pumps, answered

How much electricity does a heat pump save? +

A geyser turns one unit of electricity into one unit of heat. A heat pump moves heat from the air, delivering three to four units of heat per unit of electricity in Indian conditions, so running costs fall by roughly 70–80%. For a family of five in Gujarat at ₹8/kWh, that is about ₹1,100 a month.

Does a heat pump work in winter? +

Yes, with less output. At around 7 °C air, a heat pump gives roughly 80% of its rated heat at a COP near 3. We size for winter water and air temperatures, so the system still keeps up in January. In hill stations with near-freezing nights, add a backup heating element.

Does it work at night or in the monsoon? +

Yes. A heat pump takes its heat from the air, not from sunlight, so it heats at night and through cloudy weeks just the same.

Can one heat pump serve a hotel, hostel or pool? +

Yes. For large loads the heat pump works with external storage sized to the daily hot water demand, so the morning rush draws from a full tank while the heat pump catches up.

Heat pump or solar — which should I choose? +

Solar needs no electricity on a sunny day, but it needs roof space and a backup for nights and cloudy weather. A heat pump works at any hour on a small fraction of a geyser’s electricity. Where the roof is small or shaded, or the load is large, a heat pump is usually the better fit.

Switch your hot water to a heat pump

Tell us how many bathrooms, guests or litres a day — we size the heat pump and the storage, install it and connect it to the app.

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