Terms & Conditions - Heat pump week
Competition winner announcement - Heat pump week
We’re excited to announce the winner of our Heat Pump Week competition! 🎉
Congratulations to Trisha from Derby, who has won our Free electricity incentive. Thank you to everyone who took part!
All other terms and conditions of the competition remain as originally stated.
Promoter:
Octopus Energy Limited, UK
1. General
These Terms and Conditions (“T&Cs”) apply to the “Heat Pump Week” offer (“the Offer”). By participating, you agree to be bound by these T&Cs.
Octopus Energy reserves the right to modify, suspend, or withdraw the Offer at any time without prior notice. Any changes will be communicated via the Octopus Energy website.
In the event of any dispute regarding the Offer, Octopus Energy’s decision is final, and no correspondence will be entered into.
The Offer is separate from any Octopus Energy supply agreements and does not affect your rights under those agreements.
2. Offer Period
The Offer opens at 00:01 on 29 September 2025 and closes at 23:59 on 5 October 2025 (the “Offer Period”).
3. Eligibility
The Offer is open to domestic customers in England and Wales.
Participation is limited to customers currently on supply with Octopus Energy.
Participants must have an Octopus Energy heat pump installed prior to 29 September 2025.
Participants must be 18 years of age or older.
Employees of Octopus Energy, their families, agents, or anyone connected with the Offer are not eligible.
4. How to Enter
To enter, participants must post on Twitter (X), Instagram, Facebook, TikTok, or LinkedIn during the Offer Period.
Posts must:
Be publicly visible.
Tag Octopus Energy on the platform used.
Include the hashtag #heatpumplove.
Share something the participant loves about their heat pump.
Only one post per platform per customer will be eligible. Posts that are deleted, private, or do not comply with platform rules will not qualify.
By entering, participants confirm that all information provided is accurate and agree to allow Octopus Energy to use their post or a version of it for promotional purposes.
5. Prize
One winner will receive free electricity for one year, up to £1,755. The prize consists of the equivalent of one year’s worth of electricity, calculated using Ofgem’s definition of medium domestic consumption and Octopus Energy’s Standard Variable Rates (Flexible Octopus) at the time of the draw. On the 5th October 2025 this will be £1,755.
The prize will be applied as a credit to the winner’s Octopus Energy account within 30 days of the offer end period.
The prize is non-transferable, non-exchangeable, and no cash alternative is available.
6. Winner Selection & Notification
The winner will be selected at random from all eligible entries within 30 days of the end of the Offer Period.
The winner will be notified via direct message on the platform used to enter.
If the winner cannot be contacted or declines the prize, an alternative winner will be selected at Octopus Energy’s discretion.
7. Data Protection
By entering, participants consent to Octopus Energy processing their personal data for the purpose of administering the Offer and for promotional purposes.
Personal data will be handled in accordance with UK data protection law and Octopus Energy’s Privacy Policy: https://octopus.energy/policies/privacy-policy/
8. General Conditions
Octopus Energy is not responsible for entries that are not received due to technical failures or other circumstances beyond its control.
The Offer cannot be used in conjunction with any other promotional offer, unless expressly stated by Octopus Energy.
Participants are responsible for any costs or travel required to claim the prize.
These T&Cs are governed by the laws of England and Wales.
Cosy heat pump customers on the Cosy Octopus tariff saved an average of £224 last year compared to using a gas boiler running at 85% efficiency on our standard variable tariff
This figure is based on the actual energy consumption of all Cosy heat pump customers on a Cosy Octopus tariff between 1 July 2025 and 1 July 2026, using tariff rates at the time.
We compared this to the cost of producing the same amount of heat with a gas boiler operating at 85% efficiency, priced using our Flexible Octopus (standard variable) tariff at the same time.
Savings from gas standing charges were included only for customers who had fully removed their gas supply (less than 3% of customers). Actual savings vary depending on system design, tariff choice, home insulation, and energy use.
Our typical heat pump price is £4,459, which is lower than the national average of £5,600
This is the median post-survey price from all of our heat pump quotes after the £7,500 Boiler Upgrade Scheme has been applied, between 01/09/2025 and 28/02/2026. The national average is taken from the Boiler Upgrade Scheme statistics: April 2026 – median cost of installation Q4 2025.
Cut carbon emissions by 82% with a heat pump
This is the typical reduction in heating carbon emissions using an electric powered heat pump compared to a gas boiler.
The carbon breakdown
Gas CO2 (tonnes per year) - 2.42
Electricity CO2 (tonnes per year) - 0.43
Carbon saving (tonnes per year) - 1.99
Data sources and assumptions
Gas Energy Usage (kWh) 11500 (Ofgem medium use gas usage (Jun 2026))
Heat Pump Efficiency 312% (typical seasonal coefficient of performance from a fleet of Octopus high temperature heat pumps)
Gas Boiler Efficiency 85% (The typical gas boiler efficiency from a BEIS study)
Gas fuel emissions of (gCO2/kWh) 210 (SAP 10.2)
Electricity fuel emissions of (gCO2/kWh) 136 (SAP 10.2)
Based on these sources, heat pumps typically produce lower operational emissions when heating the home than gas boilers.
For more information, explore our Octopus Cosy heat pump fleet performance dashboard.
We're the largest heat pump installer on the Boiler Upgrade Scheme
Based on Octopus benchmarking against Ofgem reports from 2024, and we've continued to grow since.
Our customers love their heat pumps!
- 93% of people say it's the same or more comfortable than their previous boiler
- 87% say it costs the same to run or less
- 83% say it's the same noise or less than the previous boiler
- 90% say it's just as easy or easier to maintain
We survey all our heat pump customers 3 months post-installation to see how they find their heat pump compared to their previous gas boiler. Survey results are taken from a sample of 2,837 customers:
Comfort: 93% of people say it is the same or more comfortable than their previous boiler.
Running Costs: 87% say it costs the same to run or less.
Noise: 83% say it is the same noise or less than the previous boiler.
Maintenance: 90% say it is just as easy or easier to maintain.
A heat pump is around 4x more efficient than a gas boiler
Heat pumps don't generate heat by burning fuel. Instead, they transfer existing heat into your home. This means they can deliver multiple units of heat for each unit of electricity used.
Based on performance data from a fleet of installed Octopus Cosy heat pumps, typical real-world seasonal performance (SPF or SCOP) is around 3.6. This means around 3–4 kWh of heat is delivered for every 1 kWh of electricity used (an effective efficiency of 300–400%). By comparison, typical UK domestic gas boilers operate at around 85% efficiency, delivering approximately 0.85 kWh of heat per 1 kWh of gas used. On this basis, a heat pump can be around 4× more efficient than a typical gas boiler.
All our heat pumps are independently tested by the Building Research Establishment (BRE), with SCOP values published on the Microgeneration Certification Scheme (MCS) product database. Actual efficiency will vary depending on the property, system design, and usage. For more information, explore our Octopus Cosy heat pump fleet performance dashboard.
The UK's most awarded energy supplier
We've won more awards for customer service than anyone else.
Heat pumps give reliable, consistent heating and hot water
The heat pump user survey report by Nesta from May 2023 summarises that "users are highly satisfied with their heat pumps". It states: "People living in England, Scotland and Wales who own their home and use a heat pump to heat it are satisfied that heat pumps are safe, reliable, quiet heat sources that are effective for space heating and producing hot water." Find the full report here.
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.
Heat pump heating makes the air healthier in your home
Homes with a heat pump emit far less harmful nitrous oxide (NOx) emissions than those with gas boilers and cookers, significantly reducing asthma and other respiratory illnesses. According to the Sustainable Markets Initiative Cleantech Homes report.
A heat pump can add thousands to your property value
Analysis by the Department of Land Economy at the University of Cambridge suggests a 16% value uplift for new-build homes with enough solar and battery storage to eliminate energy bills. A further study of over five million existing properties indicates a 2-3% value increase for existing homes with solar panels or heat pumps (versus like-for-like gas-heated homes), according to the Sustainable Markets Initiative: Cleantech Homes report, 2024.
As of April 2025, the average house price in the UK is £265,497 according to the Land Registry. Therefore, a 2-3% value increase for an average house priced at £265,497 would be between £5,310 and £7,965.
Heat pumps typically last longer than gas boilers
The expected lifespan of a typical gas boiler is 10–15 years. A heat pump typically has a lifespan of 15–20 years, with UK government research indicating an average of around 20 years. Manufacturer Daikin reports similar ranges. Actual lifespan depends on factors such as installation quality, maintenance, usage patterns, and operating conditions.