Octopus Energy to launch Cosy Cooler for heat pump systems in 2027
A new add-on device for existing heat pumps is planned to offer home cooling, potentially providing an alternative to traditional air conditioning units.

Key points
- The Cosy Cooler is expected to launch in 2027 with a cost between £500 and £600.
- The device is designed to work with existing radiator pipework to circulate chilled air throughout the home.
- Registration for information regarding the upcoming launch and availability is currently open through the company's website.
Octopus Energy has announced the development of the Cosy Cooler, a device intended to turn existing heat pumps into home cooling systems. The company stated the unit is designed to address warmer summer temperatures by providing an alternative to standalone air conditioning units.
How the system works
The Cosy Cooler is described as being approximately the size of a tall kitchen bin. It connects directly to radiator pipework to circulate chilled water. The unit draws warm air from a room, cools it, and transfers the removed heat through pipes to the outdoor heat pump unit, which then releases the heat outside.

Availability and costs
The product is scheduled for release in 2027. Octopus Energy estimates the cost will range from £500 to £600. The company noted that this is significantly lower than the cost of traditional air conditioning systems, which can range between £2,000 and £6,000. Live trials for the device are currently underway.
What it means for you
- Households with an existing Octopus Cosy heat pump can register their interest online to receive updates on the product launch.
- The device is compatible with existing radiator pipework, meaning it can be installed in three hours or integrated as part of a new system.
- Depending on the specific heat pump model, users may be able to run up to three units in different rooms.
Sources
We compared these reports before writing and checked every figure, date and name in this story against them. Read them for the full detail.
- Octopus Energy: Now heat pumps can do air-con too: the Octopus Cosy Cooler (22 Oct)
- The Eco Experts: Octopus turns heat pump into home cooling system with Cosy Cooler (22 Oct)
Spotted a mistake? Email [email protected]. This story is based on the reports above and its facts were checked against them; it is not financial advice.


