Industrial heat pump manufacturers in India: how they compare, and how to choose one for your plant
Tetra Heat Pump is designed and built in Navi Mumbai by Promethean Energy Private Limited, one of the heat pump manufacturers in India building machines for industrial process heat, with 200+ installations in service as at August 2026. Our machines give continuous hot water and process heat up to 120°C with ±0.5°C control, from single units up to 1,450 kW to multi-unit sites of 5 MW. In case your plant burns fuel for washing, pretreatment, CIP, pasteurisation or jacketed vessels, send us the duty and the fuel bill. Our team will work out, as per your load profile, how much of it a heat pump can take and what it will save.
The fuel you are replacing decides the saving more than the maker does. Against PNG and furnace oil the breakeven COP is 1.0 to 1.2, and against LDO and diesel it is 0.56 to 0.67. Any working machine beats these fuels, with savings in the 40 to 70% range. Against delivered coal the breakeven is 3.3 to 6.5, hence there the case for switching is compliance and air quality.
Why buy from an Indian manufacturer?
Spares and fit. Firstly, an imported machine ties every replacement part to a customs clearance and an overseas dispatch, which most plants discover the first time a compressor fails. We design and build here, and we commit in writing to a 24 to 48 hour service response. Secondly, very few Indian plants still match their original drawings. A retrofit has to fit the pipework and electrical headroom that actually exist, and our survey designs the installation around your plant as it stands. We do not import machines and rebadge them. There is more on the company here.
How do industrial heat pump manufacturers in India compare?
Here are the four things a buyer checks first, i.e. output temperature, unit capacity, configurations and service footprint. Each maker's figures are as published on its own website, checked on 20 October 2026, and "not published" means we could not find the figure there.
| Manufacturer | Output temperature | Unit capacity | Configurations | Service footprint |
|---|---|---|---|---|
| Tetra Heat Pump (Promethean Energy), Navi Mumbai | Up to 120°C continuous, ±0.5°C control | Up to 1,450 kW per machine; up to 5 MW per site with several units | Air source, water source, cascade | Written 24 to 48 hour response, not tied to a city; supplied across India; 200+ installations as at August 2026 |
| TRIGeN Decarbonisation, Hyderabad and Chennai | Hot water to 170°C and steam to 165°C (hydrocarbon unit) | 100 to 825 kW (hydrocarbon unit); steam heat pumps 60 kW to 2 MW | Steam, hot water, hot air and dryers, reversible, ultra-low ambient | Response time not published |
| Rockshell Corp, Navi Mumbai | Steam to 200°C at 14.5 bar; air and water source units to 130°C | 30 to 3,000 kW (air and water source); steam 100 kW to 10+ MW | Air source, water source, dual source, high and low pressure steam, dryers | Response time not published |
| Thermium, New Delhi | Hot water to 95°C, steam to 120°C | 50 kW to multi-MW; per machine not published | Air source, water source, waste heat recovery | 24/7 remote monitoring of active installations; response time not published |
| Aspiration Cleantech Ventures, Chennai | 60 to 120°C | 10 kW to 1 MW+ | Cascade, with free cooling | Service teams in 20+ states; response time not published |
Tetra Heat Pump publishes a 24 to 48 hour service response, 200+ installations and ±0.5°C control at the output. For steam or drying above 120°C, Rockshell and TRIGeN Decarbonisation build steam machines, which we do not. Below 120°C are the wash, pretreatment, CIP, pasteurisation and jacketed vessel loads of the seven sectors we serve. On those we can usually take the load off the boiler and leave it raising only the steam that still needs it.
What does Tetra Heat Pump build?
One machine goes up to 1,450 kW, and several machines together reach 5 MW of project capacity on one site. Please keep the two numbers apart when you compare quotations, because "up to 5 MW" with no qualifier usually describes a plant of several machines. In most plants a bank of machines is the better design anyway. It holds efficiency at part load and keeps producing when one unit is down for service.
COP depends on the lift. Our water source units reach COP 4.5 to 5.2 at 60°C output, and the figure comes down as output approaches 120°C. Measured in Indian conditions, it comes to approx. 2.26 at 110°C, and about 2.0 at 120°C. A single COP quoted across a 60 to 120°C envelope is therefore the easy-end figure, so ask every vendor, us included, for the COP at your own temperatures.
The machines connect to BMS, SCADA and PLC systems, including Siemens and Allen-Bradley controllers, over Modbus and BACnet. The specification, the integration scope and the industries section give the detail. The same machines run commercial water heaters for hotels and boiler feed water preheating beside a boiler that stays. They also run waste heat recovery systems that lift heat a plant already rejects.
What have we built?
Four of our installations are written up with their measured results.
A 1.5 MW paint shop pre-treatment line
On an automotive plant, the installation took over alkaline degrease at 55 to 80°C, zinc phosphating at 50 to 60°C, the hot rinses and the paint shop AHU reheat. Every oven stayed on the existing plant. Energy cost for that duty came down by 65%, and the plant avoids 400 tonnes of CO2 a year. Since one unit tops out at 1,450 kW, this site runs more than one. The full duty list is in the paint shop case study.
600 kW holding paint booth temperature and humidity
On another automotive plant, a 600 kW Tetra Heat Pump holds the paint booths at 26°C and 60% RH whenever they are in use. A pharmaceutical cleanroom needs the same from its air handling, hence the same approach applies there. See the paint booth case study.
A 900 kW liquid milk dairy, with heat recovery
The heat pump takes refrigeration heat the plant was already rejecting. It raises the 85 to 90°C hot water loop feeding the pasteuriser's plate heat exchanger, so it never touches the milk. What was installed is in the dairy case study.
A 200-room resort
Guest hot water, laundry and pool heating moved to a Tetra Heat Pump, and heating cost came down by 70%. The installation avoids 250 tonnes of CO2 a year. The hotel case study covers how the storage was sized.
Our customers' names stay off these studies, and the measurements stay in. All four are on the case studies page.
How do you evaluate an industrial heat pump manufacturer?
| What to check | Evidence to ask for | Tetra Heat Pump |
|---|---|---|
| Continuous output temperature | The continuous figure with its conditions; a peak figure is not enough | Up to 120°C, ±0.5°C control |
| COP at your operating point | A COP curve across source and output temperature | 4.5 to 5.2, water source at 60°C output, falling toward 120°C |
| Capacity per machine, and machine count | Per-unit and site capacity, stated separately | 1,450 kW per machine, to 5 MW per site |
| Control interfaces | Named protocols and controller families | BMS, SCADA and PLC; Siemens and Allen-Bradley; Modbus and BACnet |
| Service response and spares | A written response time, and where spares are kept | 24 to 48 hour response. Maintenance scope |
| Installations still running | Measured consumption before and after, with the fuel price and date | 200+ installations as at August 2026; case studies |
Agree the performance test before the purchase order
Write down the duty, the source and output temperatures, the ambient conditions and the measurement points. Record who calibrates the instruments. Indian process loads swing with the shift pattern, so also ask at what part load the efficiency starts to fall. Ask for ours in writing, and hold every vendor on your list to the same.
Certificates
Ask for the certificate itself, and check its scope line and expiry date. For a heat pump the useful documents are the vessel pressure records, the refrigerant leak test records, the panel documentation and the factory acceptance test report with its calibration certificates. Promethean Energy obtains certification project by project, to the standard your site requires. Please note that a hot water loop below 100°C needs no boiler registration. Our post on replacing steam with hot water shows which duties can make that move.
Price
We do not publish a price list, because the same nominal capacity is a different machine on a different duty. A quotation moves with the lift from source to output temperature and with the capacity and number of units. It also moves with any warm effluent or rejected heat on site, the pipework and control integration, and the electrical work for the added load. The cost page takes each of these apart, and sanctioned load and deposits has its own post. Accelerated depreciation on heat pumps is 40%, as our piece on incentives sets out. Send us your duty and our team will price it.
Which fuel are you replacing?
| Incumbent | Price and date | Cost per useful kWh thermal | Against a heat pump at COP 3.5 |
|---|---|---|---|
| PNG, Gujarat industrial | ₹68/SCM, June 2026 | ₹7.24 | 67% saving |
| Furnace oil | ₹71.99/kg, 1 Aug 2026 | ₹7.70 | 69% saving |
| Light diesel oil | ₹107.65/litre, 1 Aug 2026 | ₹12.58 | Widest gap in this table |
| Coal, delivered | ₹6,000/tonne | ₹1.94 | Minus 24%. The heat pump loses |
| Heat pump at COP 3.5 | ₹8.44/kVAh, Maharashtra HT-I | ₹2.41 |
These are our own figures, at 860 kcal per kWh and typical boiler efficiencies of 85% for gas, 80% for oil and 70 to 72% for coal. The LDO calorific value is indicative. Maharashtra bills HT-I per kVAh and not per kWh, so at a poor PF each useful unit costs you more than ₹8.44.
Against gas, furnace oil, LDO and diesel any working machine wins. In case you are told gas will become cheaper again, check the pre-crisis Morbi industrial rate of ₹41.60/SCM: the saving there is still 46%. If your boiler fires LDO, the heat pump vs diesel boiler comparison gives the breakeven for each state tariff. If someone has offered you an industrial electric boiler as the simpler swap, a heat pump gives the same heat for roughly a third of the electricity. Against delivered coal the heat pump loses on running cost. A coal-fired plant moves for stack emissions, cluster air quality limits, ash and labour handling or a customer audit, and on captive renewable power the arithmetic changes.
Where does Tetra Heat Pump serve?
We manufacture in Navi Mumbai and supply across India. Our 24 to 48 hour service response is not tied to a city, because what counts when a machine stops is the written commitment and the spares behind it. For a plant in the Mumbai region, see industrial heat pumps in Mumbai for the tariff and connection. Industrial heat pumps in Pune does the same for Chakan and Ranjangaon.
Frequently asked questions
Who manufactures industrial heat pumps in India?
How does Tetra Heat Pump compare with other heat pump manufacturers in India?
What should I look for in an industrial heat pump manufacturer?
How much does an industrial heat pump cost in India, and why is there no price list?
How large an industrial heat pump can be installed on one site?
Will a heat pump pay on your fuel bill?
Start with the fuel you burn now and the temperature you need. Divide your landed electricity tariff by what one useful kilowatt-hour of heat costs you today. In case the result is below the COP achievable at your output temperature, the switch pays on running cost alone, and our calculator does the division for you. If it comes out in favour, the next step is a look at your load profile and heat sources before any quotation, and you can start that here.