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Octopus Energy is developing the Cosy Cooler, an add-on designed to provide room cooling through existing Cosy heat pump pipework. The company says it is targeting a 2027 launch and an estimated £500–£600 retail price, but the product remains in prototype development and final specifications are not confirmed.
Octopus Energy is developing the Cosy Cooler, an add-on designed to provide cooling through the pipework of its existing Cosy heat pumps. The British-engineered product is planned for launch in 2027, and Octopus says it expects a retail price of around £500–£600—although the device remains a prototype.
The cooler is designed to connect to a Cosy heat pump’s existing system pipework rather than operate as a separate air-conditioning system. According to the product description reported by Cooling Post, the unit draws heat from room air and transfers it through a heat exchanger connected to the radiator loop, which is maintained at a stated 18°C. The heat then travels through the heating pipework and is rejected by the outdoor Cosy heat pump.
Octopus says the add-on could be installed in about three hours without major building work, and would cost a fraction of a separate air conditioner. Those are company estimates, not confirmed installation times or prices for a finished product. Depending on the Cosy heat pump model, the system is intended to cool one room or operate as many as two to three units in different rooms at once.
Dimensions given for the current prototype are 722mm high, 430mm wide and 358mm deep, with a weight of about 28kg. The published details describe a product under development, so the measurements and system capabilities may change before a retail version is released.
Cooling Without a Separate AC System
If the design reaches market close to the company’s stated price and installation estimate, it could offer some Cosy heat pump owners a way to add room cooling using equipment they already have. The proposed approach relies on the home’s existing heating pipework and outdoor heat pump, rather than a standalone air-conditioning unit. That may reduce the need for separate equipment and extensive installation work, though the actual savings and suitability will depend on the finished product and the individual home.
The proposal also extends the use of a heating system into warmer months, when some households may want cooling as well as heat. However, Octopus has not published independent performance results, running costs or detailed guidance on which homes and Cosy models will support the add-on. Its estimates should not be treated as proof that it will be cheaper or simpler for every customer.
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Designed for Existing Cosy Systems
The Cosy Cooler is presented as an accessory for Octopus Energy’s Cosy heat pumps, not as a standalone cooling product for homes without that system. Its planned connection to existing pipework is central to the company’s proposition: the indoor add-on would transfer room heat into the loop, while the outdoor heat pump would reject it.
Cooling Post reported the development and relayed the proposed launch timing, price range, installation estimate and prototype dimensions. The report does not describe a product already on sale or a confirmed launch date within 2027. No finalized specifications, independent tests or customer installation data were included in the available details.
“The add-on is expected to retail at around £500–£600.”
— Octopus Energy, as reported by Cooling Post
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Prototype Details Still Subject to Change
The 2027 launch date is a target, not a confirmed release day. It is also unclear whether the projected price will include installation, whether the three-hour estimate applies across different home layouts, and what any installation would cost in addition to the unit. Octopus has not provided published cooling-capacity figures, energy-use estimates, noise information or performance testing in the source report.
The number of rooms that can be cooled is reported to depend on the Cosy heat pump model, but the specific compatible models and operating limits have not been detailed. The final dimensions, weight, product name and technical design could also differ from those of the current prototype. No information was provided on warranties, availability or eligibility for existing customers.
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Product Testing Before Planned Release
Octopus is continuing development ahead of its planned 2027 launch. The next useful details for prospective customers would include confirmed compatibility by Cosy model, final pricing and whether installation is included, along with cooling performance and energy-use data. Until the company releases those specifications or begins taking orders, the Cosy Cooler should be treated as a product in development rather than an available upgrade.
heat pump system upgrade for cooling
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Key Questions
What is the Cosy Cooler?
It is a planned add-on for Octopus Energy’s Cosy heat pumps, designed to cool rooms by transferring heat into the system’s existing pipework.
When is it expected to go on sale?
Octopus is targeting a launch in 2027. A specific release date has not been announced in the reported details.
How much is the cooler expected to cost?
Octopus estimates a retail price of around £500–£600. The final price and whether it includes installation have not been confirmed.
Can it cool more than one room?
The reported design can serve one room or operate up to two to three units across different rooms, depending on the Cosy heat pump model. Compatibility details have not yet been published.
Is the Cosy Cooler available to buy now?
No. The reported unit is a prototype under development, with a planned launch in 2027.
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