Cosy Heating
More than just a heat pump
Efficient, quiet, Cosy. Introducing the Cosy heating system.
5 star customer service, effortless heating control and a money-saving smart tariff.
We're making green heating easier & cheaper, so all you need to do is get Cosy.
- Designed & made in the UK
- Built, installed & supported by Octopus experts
- 8 year product warranty
- Pairs seamlessly with the Octopus Energy app
- MCS certified & eligible for £7,500 grant
- Suitable for most UK homes
Find out if a Cosy heating system is the right fit for your home
Easy to control, cheaper to run
Access your home's heating and energy all in one place with the Octopus Energy app for complete control at your fingertips.
Plus get energy when it’s cheapest and greenest by matching your heating schedule to a smart tariff like Cosy Octopus – helping you to save money on heating bills when compared to gas, without compromising on comfort.
Try our running costs and savings calculator
Developed by leading experts, Cosy is designed & tested to exceed the MCS certification standard, even under the most strenuous real-world heating conditions.
Following an in home survey, our expert will put together a bespoke recommendation for your home. From heat pump size & location to the flow temperature & tariff.
We can remotely monitor and update your Cosy system, and have direct insights into your heat pump’s performance, so if there’s ever an issue, our in-house team will be on hand to help.
The Cosy heating system
Cosy is the complete package: a heat pump, hot water cylinder, straightforward controls and up to four Cosy Pods to monitor the temperature and humidity of your home.
Together with our clever Octopus tech, it works effortlessly to warm up your home and hot water up to 4x more efficiently than a gas boiler.
The outdoor unit
The Cosy heat pump is designed to be installed and run incredibly efficiently. Unlike many heat pumps, Cosy uses the new natural refrigerant R290, which is better for the environment.
Hot water cylinder
Sized to suit your home, our hot water cylinders are highly insulated to keep heat loss to a minimum whilst storing your hot water. Made from durable duplex stainless steel.
Cosy Hub
This smart device sends information back and forth from your heat pump to your app. Built with handy light indicators to show connection, heat status and more.
The Octopus Energy App
Control your heating and water from anywhere, with ease. Switch heating on and off, set schedules, monitor temperature and humidity around your home, track your heating performance and much more.
How to get Cosy
We’ve got three lovely Cosy heat pumps ready to keep you snug: Cosy 6, Cosy 9 and the brand new Cosy 12.
Our latest arrival, the Cosy 12, extends our award-winning Cosy heat pump line to cover even more homes, delivering comfort and efficiency for larger heating needs.
Curious if Cosy’s right for you? During your free home survey, we’ll measure your heat loss to see which model fits best. If it's not the right fit, we'll match you with the perfect alternative heat pump from Daikin for the same price.
Want to see what others think? Have a peak at our customers' reviews.
Ready to get started? Grab an quick quote today and book your no-obligation survey.
Heat pump comparison
| Cosy 6 | Cosy 9 | Cosy 12 | |
|---|---|---|---|
| Heat capacity (-5ºC ambient / 65ºC flow) | 5.2 kW | 8.1 kW | 10kW |
| Heat capacity (-5ºC ambient / 50ºC flow) | 5.6 kW | 8.7 kW | 11.2 kW |
| Minimum power draw | 0.35 kW | 0.50 kW | 0.50 kW |
| Sound power levels | 58 dB(A) | 56 dB(A) | 60 dB(A) |
| SCOP (designed at 50°C) | 3.4 | 3.6 | 3.9 |
| SCOP (designed at 65°C) | 2.8 | 3.0 | 3.3 |
| Max flow temperature | 70℃ | 70℃ | 70℃ |
| Dimensions (W x H x D) | 855mm x 1125mm x 595mm | 855mm x 1375mm x 595mm | 855mm x 1375mm x 595mm |
| Reheat time for 180L water cylinder (from 10ºC to 48ºC) | ~70 mins | ~45 mins | ~40 mins |
| Reheat time for 300L water cylinder (from 10ºC to 48ºC) | ~125 mins | ~80 mins | ~70 mins |
Frequently asked questions
Will Cosy work in my home?
Cosy 6 is generally suitable for homes with 1-4 bedrooms and heat loss of less than 5.6 kW, while Cosy 9 is generally suitable for homes with 3-5 bedrooms and a heat loss of up to 8.7 kW. Our newest arrival, the Cosy 12 is built for larger or older homes with a heat loss of up to 11.2 kW.
We will check this when taking our usual measurements during your survey. For more information on costs and installation requirements, check out our heat pump FAQs page.
Other considerations:
Do I need a hot water tank?
You'll still need a tank to store the hot water your heat pump makes. The good news is that our installations include a new high-efficiency tank if you don’t have one.
Does the existing system have to be pressurised?
We'd recommend a pressurised system rather than open vented in some cases (the same applies to a boiler though!)
Does it work with microbore pipes?
Cosy heat pumps work with copper or plastic microbore piping 10mm or larger. And our high temperature option opens them up to a broader range of properties. Our Cosy heat pumps can create the same water temps as a gas boiler, so if gas heats your home today it’s very likely that a Cosy heat pump can do it too.
Will the fan get blocked with snow?
We’ve worked closely with the fan manufacturer to ensure the mounting position isn’t affected by snow. In fact, the same designers worked on a RED heat pump model with a fan that sits and works directly upwards, installed across Scotland and Germany without any fan blockage issues.
What colour is Cosy 6?
Whilst the Cosy 6 was originally unveiled in purple, we are currently installing the model in dark grey with a hard-wearing mottled texture.
Our claims explained
Heat pumps can save you money
We expect a medium use home to save around £368 a year, running a Cosy Eco heat pump on our Cosy Octopus 12 month fixed tariff with no gas supply, compared to a gas boiler on a standard tariff. Check out our heat pump savings blog for a full breakdown of our running cost calculations compared to a gas boiler.
Built by the UK's most trusted energy supplier
We've won more awards for customer service than anyone else.
Supplied with 5 star customer support
Octopus Energy has a 5 star rating on Trustpilot.
Heat pump heating makes the air healthier in your home Homes with a heat pump emit far less harmful nitrous oxide (NOx) emissions from gas boilers and cookers, significantly reducing asthma and other respiratory illnesses. According to the Sustainable Markets Initiative Cleantech homes report.
The Cosy heat pump is quiet
Heat pump sound power levels are verified by an independent, third-party laboratory as part of the testing process for inclusion on the MCS product database. The laboratory verifies the sound power on the A-weighted decibel curve, as A-weighting closely aligns to how humans perceive "loudness". All heat pumps are measured using EN14511 standards to ensure uniformity across manufacturers and models. Our Cosy 6 heat pump has a verified sound power level lower than many other heat pumps of the same capacity.
Ready for your personalised quote?
Whether you’re just curious or have done your homework, getting a quote is a simple, stress-free next step.
Explore before you decide
We’ll show you why they’re clean, efficient, and cheaper to run than old boilers.
Learn about our smart tariffs and how they can help you save while staying cosy.
Use our savings calculator to see how much you could save by switching to a heat pump.
Hey I'm Constantine, welcome to Octopus Energy!
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