Every winter, the same ritual plays out across India’s big cities. The sky turns a dull grey, the air quality index climbs past 300, and parents keep their children indoors, schools cancel outdoor play, and hospitals brace for the seasonal rush of coughs and wheezing. Step inside, though, and the air is not much better. The air conditioner cools the room, but it recirculates the same stale air, hour after hour. The purifier filters, but it does not ventilate. The dehumidifier dries, but it does nothing about the rest. A Mumbai company called Breethr HQ thinks the answer is not another appliance on the shelf — it is one machine that does the job of five.
Its answer is the Breethr P1, a single wall-mounted unit that combines an air purifier, a ventilator, a dehumidifier, a humidifier and an air conditioner into one system. It draws outdoor air in, treats it across temperature, humidity, oxygen, pollen, pollution and bacteria, and delivers it indoors — holding the room at a single-digit air quality index, the company says, no matter how bad the air outside gets.
Five machines in one box
The idea came from a question a customer asked. An IVF clinic, watching embryos suffer from poor air quality, wanted to know why it needed five separate machines to keep one room’s air right. Breethr HQ’s founders took the question literally and built the machine that makes the five unnecessary.
Inside the unit, separate blocks handle separate jobs, and each one switches on only when it is needed. If the moisture is fine, the dehumidification block stays off. If the temperature is right, no heating or cooling kicks in. Outdoor air passes through a four-stage filtration process, with medical-grade HEPA filters taking out dust, pollen, bacteria and viruses, and special media filters stripping out chemical pollutants and odours. The company says the system reaches 99.9% filtration efficiency, and can bring a room to single-digit AQI in under twenty minutes.
The clever part is the pressure. Breethr delivers its treated air with positive pressure, so clean air is constantly pushing outward. Even with a door or window open, polluted outdoor air is pushed away rather than pulled inside — which is why the system keeps working with the windows open, letting the daylight in while the bad air stays out.
Built to sip power, not gulp it
The standard unit covers spaces up to 950 square feet, moving 150 cubic metres of air an hour, and the company says it consumes a single unit of electricity every 30 hours. The larger Breethr XL variant is built for bigger spaces. At 24 decibels, the unit runs quieter than a whisper, and three variants cover homes and clinics of different sizes, priced between Rs 30,000 and Rs 1,20,000.
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From measuring the air to fixing it
Breethr HQ was founded in Mumbai in 2024 by Abhinav Gupta and Manav Shetty, but the engineering behind it goes back much further. Gupta, a BITS Pilani graduate, has been building hardware since 2008 and spent eleven years measuring air quality. His earlier company, ActiveBuildings, deployed thousands of air-quality monitors around the world and sold more than 5,000 units, including a $1-million project with Vitalik Buterin, the co-founder of Ethereum, to put 5,000 indoor air-quality monitors and 10,000 air cleaners into schools and hospitals across Maharashtra.
Eleven years of measurement taught him something the data alone could not fix. “ACs cool air but degrade oxygen quality,” he says. “People in air-conditioned environments are not necessarily breathing better. Often it is worse.” Breethr is the other half of that lesson: a system that acts on what the measurements were saying all along.
Already breathing in a million square feet
The machine is already at work. Breethr has been deployed across more than one million square feet in India — in hospitals, IVF clinics, restaurants, commercial buildings, gyms and homes built for children and elderly residents. Its clients include Cult.Fit and Aster Hospital, and the company says its revenue has crossed $400,000, all while staying bootstrapped and cash-positive.
The ambition now stretches beyond India. Gupta spent time in the United States in September 2025 on a fellowship, testing the system with a housing developer exploring it for new residential construction, and distribution conversations are under way across Vietnam, Egypt and the United Arab Emirates. The long-term goal is simple and quietly radical: to make managed indoor air as standard as cooling itself, so that a home holds steady, breathable air whatever the sky outside is doing.
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