Search for heat pump manufacturers in India and most lists return domestic water heater brands. A plant engineer looking for 80°C process water finds nothing usable in them. This list covers the firms that build for industrial duty. We read every figure below on the maker’s own site in September 2026.
What separates an industrial machine from a domestic one
Output temperature comes first. A factory duty sits between 50°C and 120°C. A home unit stops near 55°C.
Capacity comes second, and it is measured in hundreds of kilowatts instead of litres.
The heat source comes third. An industrial machine usually lifts heat out of effluent, condenser water or boiler blowdown. Ambient air alone is the exception, not the rule.
A fourth point decides the economics. Coefficient of performance falls as output temperature rises. A COP quoted with no temperature attached tells you nothing about your own duty.
The specialists
Tetra Heat Pump, by Promethean Energy Private Limited, Navi Mumbai. The published envelope is continuous output to 120°C. Single machines run to 1,450 kW, and a multi-unit project runs to 5 MW. Temperature control is ±0.5°C. Configurations are air source, water source and cascade.
Water source units are rated at COP 4.5 to 5.2 at 60°C output. The company also publishes independent Indian measurement of about 2.26 at 110°C and about 2.0 at 120°C. That is the other end of the same curve, and publishing both is unusual. Refrigerants include R1234ze and R245fa. The company states more than 200 installations in service. Tetra Heat Pump’s company record answers the question worth putting to every maker on this list: built in India, or imported and rebadged?
TRIGeN Decarbonisation, Chennai. Based at IITM Research Park. Its site publishes a hydrocarbon high temperature machine delivering hot water, air or steam at 170°C. Heating capacities run from 100 to 825 kW. Maximum outlet water temperature is 170°C and rated outlet steam temperature is 165°C. The same site publishes pressurised hot water to 135°C, electrified steam at 145°C, and units operating from an ambient of -35°C.
Aspiration Energy, Chennai. Publishes a working range of 40 to 120°C. It states more than 5 MW of industrial heat pumps installed and India’s first 90°C heat pump. It sells through an ESCO model, where the plant pays out of measured savings, and cites research work at IIT Madras.
Thermium. Publishes two retrofit results. A 90 kW system in an automotive plant is given at a 60% energy cost reduction. A revived non-performing system in a hospital is given at 62%. Its site carries a savings calculator that takes heat load, operating hours, gas price, calorific value and boiler efficiency.
The large engineering groups
Thermax and Forbes Marshall, both of Pune, sell process heating and heat recovery equipment across Indian industry. Both carry heat pumps inside much wider catalogues. Their advantage is service reach and balance sheet.
Ask either one which specific machine is proposed for your duty. A group catalogue covers a range far wider than any single product line.
The global makers present in Indian results
Atlas Copco, GEA, Danfoss and Mayekawa all appear in Indian results for industrial heat pumps. Atlas Copco runs a properly localised Indian site. These machines are engineered for European and Japanese process plants.
Two practical questions follow. Where do the spares sit? Who attends a breakdown in Chakan or Vapi on a Sunday?
Four questions that decide the shortlist
- What is the output temperature at my duty, and is it continuous or peak?
- What is the COP at that output, and from which source temperature?
- Was that COP measured on a running plant, or rated on a test bench?
- What is one machine’s capacity, and how many units make up the project?
The fourth question catches a common confusion. A 5 MW project and a 5 MW machine are different things. A supplier quoting one while you read the other will cost you plant room space.
The buyer’s guide to industrial heat pump manufacturers in India sets out what else to put in an enquiry so quotations come back comparable.
The loads that stay on fuel
No machine on this list reaches above 170°C. Several factory loads are therefore outside the conversation:
- Alkyd polycondensation, run at 150 to 280°C and usually held at 200 to 220°C.
- Spray dryer inlets, at 180 to 200°C.
- Annealing, at 650 to 850°C.
- A galvanising zinc bath, at 445 to 465°C.
- A reheat furnace, at 1,200°C.
A supplier who says all of these can move has not surveyed the plant. The useful conversation is about the hot water duties underneath them.
Degreasing runs at 55 to 80°C. Phosphating runs at 50 to 60°C. Clean in place runs at 70 to 85°C. Pasteurisation runs at 72 to 75°C. Hotel laundry runs at 60 to 85°C. Those duties are where an Indian factory burns fuel it does not have to.
Where to start
Take one duty, not the whole plant. Establish its temperature, its running hours and the fuel it burns today. Then price the same duty on electricity, at the COP that temperature allows.
The specification for a machine at the top of the range is on the page for high temperature heat pumps.
