Here is a paradox nobody talks about at the electronics store. The one appliance most of us rely on to survive the Indian summer may also be making that summer worse.
For millions of Indians — from factory workers to schoolchildren — escaping the heat isn’t even an option.
A conventional air conditioner uses 6.5 times more electricity than necessary, leaks refrigerant gases that are hundreds of times more potent than CO2, and throws waste heat right back into the street outside your window. The more we cool ourselves, the hotter the world gets. We are, quite literally, making the planet hotter in order to stay cool. For decades, this felt like a problem without a solution.
The IPCC’s latest assessment tells us that by 2050, parts of India will regularly see temperatures crossing 50°C. There had to be another way to cool ourselves without warming the planet. A Hyderabad-based startup called Ambiator believes it has found one.
The origin story
Tiger Aster is the kind of engineer who cannot walk past a problem without trying to take it apart. An interdisciplinary engineer and IT professional who had already built and run multiple ventures, Tiger had spent years in the world of hardware, fluid dynamics, and climate systems. But it was not a laboratory experiment or a research paper that finally pushed him to act; it was watching people work through Indian summers with no real way to cool down, on factory floors, classrooms, and small shops where the heat simply lingered.
“I kept seeing how heat was destroying productivity, health, and basic dignity for workers and students who simply could not afford conventional cooling,” he recalls. The gap between what technology could theoretically do and what was actually available to most Indians had always bothered him.
When he began exploring the science of evaporative cooling more seriously, he realised that an old thermodynamic principle, using the latent heat of evaporation to cool air, had been massively underutilised, particularly in Indian climate conditions.
“The cooling problem is the most underfunded climate crisis in the subcontinent. We just weren’t looking at it that way.”
Tiger Aster and Jeeten Desai co-founded Ambiator in 2022 to build cooling systems suited for India’s heat conditions.
His co-founder, Jeeten Desai, known to everyone as JD, brought a different but complementary energy to the table. A BE in Electronics and a PGP from the Indian School of Business, JD had spent over 15 years working across global markets in entrepreneurship and business development before returning to India.
He came back with one conviction: that the cooling crisis in India was not just a market opportunity but a moral one. Together, the two founders bring over 45 combined years of experience spanning cooling technology, engineering, supply chains, finance, and governance.
In October 2022, they formally founded Ambiator. They built the entire company, bootstrapped, without a rupee of external funding, on one question: what if you could keep India genuinely cool, without destroying the planet to do it?
How this cooling system actually works
Think of the way a clay pot keeps water cold even on a blazing afternoon. It works because water seeps through the porous clay and evaporates on the surface, drawing heat away from the water inside. Ambiator’s technology is built on a more sophisticated version of the same principle called Dew Point Regenerative Evaporative Cooling, but scaled and engineered specifically for Indian conditions.
Or think of it like stepping into a shaded area with a cool breeze. You don’t need an AC to feel that sudden drop in temperature — the air just feels naturally cooler. This system recreates that effect indoors by removing heat from the air rather than forcing cold air in.
Here is how it works in plain terms: instead of compressing and expanding a refrigerant gas as a conventional AC does, instead of recycling indoor air, the system pulls in 100% fresh outdoor air and cools it using the physics of evaporation.
There are no compressors, no refrigerants, and no recirculation of stale air. The result is cool, fresh air delivered at 24 – 28°C even when it is above 45°C outside, right within the thermal comfort range recommended by the Indian Meteorological and Atmospheric Comfort (IMAC) guidelines.
The unit draws just 1 kilowatt of power; a comparable conventional AC system draws 6.5 times more electricity for the same cooling output.
It runs on a standard power connection — the kind most homes and small businesses already use, so it doesn’t need expensive electrical upgrades.The product also comes with a custom IoT firmware stack. Every deployed unit can be monitored remotely, diagnosed in real time, and maintained predictively through a web or mobile app. In a country where maintenance gaps often kill the promise of hardware products, this is not a small thing.
Ambiator’s system uses evaporative cooling to lower air temperature without compressors or refrigerants.
Think of it like a smart appliance you can check from your phone. Just as you can track a food delivery or monitor your home security camera remotely, this system can be monitored and managed through a web or mobile app. If something isn’t working as expected, it can be identified and addressed in real time — often before it turns into a bigger problem.
In a country where machines often stop working simply because maintenance is delayed or missed, this ability to track, diagnose, and fix issues early becomes a significant advantage.
The design has also been patented, which means the way it works is recognised as a unique innovation. This is important because it shows the technology isn’t easily replicable and has been formally recognised as an original innovation.
More importantly, this isn’t just an idea on paper. The system has already been tested in India’s extreme heat and is currently in use across factories, offices, hospitals, and homes.
Impact on the ground
Numbers tell one kind of story. People tell another. Today, over 35 units are running across eight cities— Hyderabad, Warangal, Bangalore, Jaipur, Delhi, Vellore, Pune, and Panchgani — serving pharma companies, packaging facilities, offices, residential complexes, physiotherapy centres, and institutional kitchens. But to understand what that actually means, it helps to spend a few minutes with someone who uses it every day.
Bharathi works at the Indian Institute for Human Settlements (IIHS) in Bangalore, one of India’s leading institutions on urban and climate research. The campus kitchen there serves meals for up to 30-40 people daily — a high-heat, high-humidity environment that runs relentlessly through summer and monsoon alike. It has been running on Ambiator for over a year now, and Bharathi has watched the change up close.
With over 45 years of combined experience, Tiger and Jeeten lead Ambiator’s cooling innovation.
“For us, it’s been a way to keep the kitchen workable without relying on ACs,” she says. “It does not emit carbon, it removes our dependence on traditional ACs. That matters a lot for an institution like ours, which is supposed to walk the talk on sustainability.” She pauses, then adds something that the founders themselves often hear but rarely expect: “Maintenance is surprisingly easy. Whenever there has been an issue, the support team has been skilled enough to handle it — no long waits, no runaround.”
“It does not emit carbon, and removes our dependence on traditional ACs. That matters a lot for an institution like ours, which is supposed to walk the talk on sustainability.” — Bharathi, IIHS Bangalore
What Bharathi describes is a piece of working infrastructure that a busy institutional kitchen has come to depend on quietly, reliably, for over a year. That kind of trust, earned in a real environment with real operational pressure, is the kind of validation that no award or recognition can replicate.
In a kitchen where stoves are on for hours, the difference is immediate — the air feels lighter, and standing through a full shift becomes easier.
The hard part
None of this came easily. Being bootstrapped in a hardware business creates a particular kind of pressure that software startups rarely face. Components have lead times. Vendors — especially the larger ones supplying specialised parts — do not offer a two-person team the same payment terms or priority they extend to established buyers.
Ambiator founders Tiger and Jeeten are building solutions for heat-affected workplaces in India.
And then there is the problem nobody warns you about when you are building something genuinely new: you have to educate the market before you can sell to it. Most buyers in India have never heard of dew point regenerative cooling. What they have heard of is the desert cooler, that rattling, occasionally effective box that struggles the moment humidity rises. Convincing a facilities manager that Ambiator is categorically different from that thing sitting on his factory floor is a conversation the team has had hundreds of times.
Some of those conversations ended well. Others did not. The team learned to see those losses not as rejections of the technology, but as the cost of being first, the invisible tax that every company building something the market has not seen before must eventually pay.
What comes next?
Ambiator’s ambitions extend well beyond replacing the office AC. The team is actively exploring two areas that could redefine the scale of their impact entirely.
The first is data centre pre-cooling. As India’s digital infrastructure grows at speed, the energy cost of keeping servers cold has become a serious problem. Ambiator’s technology, with its low power draw and refrigerant-free design, is being evaluated as a pre-cooling solution that could dramatically reduce the energy footprint of this rapidly expanding sector.
The second – and perhaps the most quietly radical – is the Heat Resilience Shelter (HRS) model. Ambiator envisions a network of 5,000 off-grid public cooling shelters for outdoor workers, migrant populations, and communities without access to any indoor refuge during peak heat waves. At that scale, the projected impact is 2,57,000 metric tonnes of CO2 offset annually and ₹1,251 crore in sovereign capital expenditure savings.
A cooler India is possible
There is something quietly powerful about a solution that looks so obvious in hindsight. Of course the answer to a warming planet should not involve more machines that warm the planet. India, a country that invented the clay pot and the step-well, that has always understood how to live intelligently with heat should be the country that figures out a better way to stay cool.
Ambiator is not promising to solve climate change single-handedly. But for the resident in Warangal, the student in a skill development centre in Bengaluru, the pharmacist in a controlled manufacturing environment in Hyderabad, the family using it in Panchgini for their store front, it is already making a difference that you can feel the moment you walk through the door.
The next time the summer arrives and you feel that familiar dread of a rising electricity bill, or worse, the quiet guilt of knowing that your comfort is coming at a cost to the atmosphere, it is worth knowing that there are people in this country who took that problem seriously enough to spend years solving it from the ground up.
India does not have to choose between staying cool and protecting the planet. Ambiator is building the proof.
To learn more or explore deployments, find Ambiator on LinkedIn.
