Octopus heat pump review: what to evaluate
An Octopus heat-pump review should start with the design and support offered for your own property, not a universal verdict. Octopus positions its Cosy heat pump as an app-controlled system with in-house design and installation, an eight-year product guarantee and dedicated support [5]. Whether that is the best fit depends on the home, heating system and final quote.
The most useful questions are practical: will the system be sized from a heat-loss calculation; can the outdoor unit and cylinder be located sensibly; which radiators need attention; what work is included; and how will the team explain controls, commissioning and aftercare?
How to keep the £100 referral on track
For a solar or heat-pump installation, the recipient and referrer each receive a £100 digital gift voucher after the installation has completed. The sequence matters: the recipient needs to use the referral link, sign up, and then obtain their quote using the same email address. Octopus states that it cannot add a referral retrospectively if the quote or purchase happened first [1].
- Register first: open the official referral page and submit the recipient's details.
- Keep one email address: use that same address for the Octopus quote and all follow-up.
- Review the design: the quote and survey determine whether the home and proposed system qualify.
- Wait for completion: vouchers are processed once the qualifying installation is finished [1].
Register before requesting a quote
That is the single rule most likely to protect eligibility. A referral link alone does not guarantee an installation, but quoting before registering can prevent the reward being applied [1].
Evidence worth checking
Octopus says its Cosy customers on Cosy Octopus saved an average of £224 in the year to July 2026 compared with a gas boiler at 85% efficiency on its standard variable tariff. It also explains that results vary with system design, insulation, tariff choice and energy use [5]. Treat this as useful context, not as a forecast for your own bills.
In its published guidance, Octopus describes an initial cost exploration, an in-home survey and a detailed design-and-install plan [5]. The survey is the point where confidence in a review becomes more meaningful: it should identify the actual equipment, any radiator or pipework changes, planning constraints and exclusions.
| Review area | What good looks like |
|---|---|
| System design | Heat loss and room-by-room requirements are explained. |
| Quote | Grant, standard scope, additional works and payment stages are clear. |
| Noise and location | Outdoor-unit position and planning/noise issues are checked. |
| Support | Warranty, commissioning and aftercare contact routes are written down. |
Bottom line
Octopus can be a credible option if its survey-led design, grant handling and app-based controls fit your priorities. Still obtain and compare written quotes where appropriate. If you use a referral link, make that your first action so the separate £100 reward does not get lost while you compare technical proposals.
Keep the final decision evidence-led
No review can substitute for the handover documents for your own project. Before accepting, make sure you understand the proposed controls, expected operation, installation preparation and aftercare route. That allows you to judge the service on evidence that applies to your home, not just published general claims.