Octopus turns heat pump into home cooling system with Cosy Cooler

• Octopus’ Cosy Cooler can help keep homes cool in the summer and warm in the winter
• The company is trying to make heat pumps more available
• The Cosy Cooler will be on sale next year for about £500

Octopus Energy has released what it calls “a clever new way to keep families cool in the summer” by claiming to turn a heat pump into an air conditioner.

Cosy Cooler is a new gadget that the UK’s biggest energy provider claims can turn a heat pump into a home cooling system and save households the money and hassle of buying a new air conditioner.

Being roughly the size of a tall kitchen bin, the Cosy Cooler plugs straight into a radiator pipework. It then circulates chilled water through the home.

The unit can cool single rooms or run up to two to three units at once, depending on the heat pump model.

It actively draws warm air from the room, removes the heat with a heat exchanger and blows the cooler air back into the space. The heat it removed is transferred through the heating pipework to the outdoor Cosy Heat Pump, which releases it outside.

Octopus says it has released Cosy Cooler to help make heat pumps more mainstream and to encourage its customers to switch from a gas boiler.

The company says that 99% of its Cosy customers pay less than they would with a gas boiler, and as a result they save £230 a year.

Greg Jackson, Octopus Energy’s founder and CEO said that Boiler Upgrade Scheme, the government’s grant for heat pumps, has helped “give the industry the confidence to invest, innovate, and drive costs down”.

Cosy Cooler will be available in 2027 and will cost about £500-£600 when added to an existing Cosy heat pump system. This is a lot less than the £2,000-£6,000 cost of a traditional air-conditioning system.

Written By

Maximilian Schwerdtfeger Deputy editor

Max joined The Eco Experts as content manager in February 2024 and became deputy editor in 2025. He has written about sustainability issues across numerous industries, including maritime, supply chain, finance, mining, and retail. He has also written extensively for consumer titles like City AM, The Morning Star, and The Daily Express.

He has represented The Eco Experts on national television several times, including the BBC’s Sunday Morning Live and ITV Tonight .

In 2020, he covered in detail the International Maritime Organisation’s (IMO) legislation on sulphur emissions and its effects on the global container shipping market as online editor of Port Technology International.

He also explored the initiatives major container ports and terminals have launched in order to ship vital goods across the world without polluting the environment.

Since then, he has reported heavily on the impact made by environmental, social, and governance (ESG) practices on the supply chain of minerals, with a particular focus on rare earth mining in Africa.

As part of this, in 2022 Max visited mines and ports in Angola to hone in on the challenges being faced by one of the world’s biggest producers of rare earth minerals.

His most recent sustainability-related work came much closer to home, as he investigated the eco-challenges faced by independent retailers in the UK, specifically looking at how they can cut emissions and continue to thrive.

Max lives in South London and is an avid reader of books on modern history. He has also recently learned to play the game Mahjong and takes every opportunity to do so. He is also yet to find a sport he doesn’t enjoy watching.

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