Energy crisis fuels heat pump boom as Octopus unveils Cosy performance hub

• New website shows current and year-long data from every installed Cosy heat pump, proving once and for all that heat pumps can be cheaper to run than gas boilers
• Designed and made in the UK, Octopus’s Cosy heat pumps deliver gas boiler beating efficiency – a toasty 4 kWh of heat out for every 1 kWh unit of energy in (COP: 4.11)
• Four out of five Cosy owners paid less to heat their homes over the past year than they would have with a gas boiler, with a £219 average saving
• Customers love their heat pumps: 89% are satisfied with their system’s performance – even through January’s cold snap – a new survey shows

London, 19th March 2026 – In a direct challenge to industry skeptics, Octopus Energy today unveils a revolutionary new tool proving that heat pumps aren’t just the future – they’re cheaper right now.

The Cosy Heat Pump Fleet Performance Dashboard* streams up-to-date efficiency and cost data from all Cosy heat pumps in thousands of real British homes, providing total transparency in the face of ongoing misinformation from fossil fuel lobbyists.

Designed and manufactured by its specialist team near Belfast, Octopus’ award-winning Cosy heat pump includes multiple sensors which measure temperature and humidity and enable a more comfortable home.

Octopus offers optional remote servicing to keep systems in top condition – no annual service visit needed. It also provides wireless software updates (just like a smartphone or computer) to boost comfort, control and efficiency even after installation.

The new dashboard collects anonymised aggregate data and proves that over the last month, Cosy systems generated over 4 kWh of heat for every 1 kWh unit of energy put in, with a COP (efficiency rating) of 4.11. This compares with a generally accepted COP of 0.85 for a gas boiler**, meaning Octopus’s heat pumps run at about 4.7 times the efficiency of gas boilers.

The dashboard also allows users to drill down into regional data, showing exactly how much heat is delivered for every kWh of energy used to power the Cosy fleet across Great Britain.

With an annual average performance of 3.68 (Seasonal Performance Factor or SPF), the data confirms that the Cosy is officially winning the battle against the gas boiler.

Not just on performance, but Cosy wins on price too – 80% of Cosy heat pumps have been cheaper to run over the last year than a gas boiler. Customers on Octopus’ heat pump tariff, Cosy Octopus, saved on average £219 a year vs a gas boiler.

Greg Jackson, CEO and Founder of Octopus Energy, said: "We're launching this revolutionary data dashboard to prove, in perpetuity, that heat pumps cost less to run than a gas boiler.

“This isn't a projection or a lab test – it's daily data from thousands of homes. We are showing the world that our Cosy tech can beat the boiler in efficiency, slash bills, and lead the charge to a cleaner, cheaper energy system.”

It comes as Octopus releases the results of a new survey. In a recent survey of Octopus customers, 85% said their heat pump costs the same or less to run than their old gas boiler, and 89% reported total satisfaction even during the January 2026 cold snap.***

-Ends-

Notes to editors:

*The dashboard is updated twice daily.

**DECC (BEIS), Final Report: In-situ monitoring of efficiencies of condensing boilers and use of secondary heating

***Survey of 1,820 Octopus Energy customers who had either a heat pump or a gas boiler installed in their house. Survey carried out by Octopus Energy between 5th and 8th January 2026.

Press Contacts

Octopus Energy Group

press@octoenergy.com

+44 (0)20 4530 8369

About Octopus Energy

Octopus Energy is a global clean energy and technology business, driving the affordable, green energy system of the future. Under its own retail brand, Octopus delivers world-class customer service and cutting-edge energy products to 11 million households globally.

The company is driving the electrification of heat and transport through smart tariffs and innovative clean tech, with operations spanning 27 countries and the entire energy value chain. It operates a £7 billion renewables portfolio as well as thriving EV leasing, heat pump, and solar businesses.

Backed by pension funds, investors and energy giants, Octopus Energy Group businesses deliver cheaper, greener energy and cutting-edge tech to countries and customers worldwide.

For more information, check out our website.