In this Cosy 6 heat pump review, we dive into Octopus Energy’s 2026 lineup, focusing on its compact, UK-made air source heat pumps designed for efficient renewable heating in North East homes like those in Tyne and Wear and Newcastle.
Homeowners and landlords will appreciate the real-world performance data, smart controls, and grant-friendly pricing to make the switch from gas boilers.
Cosy 6 Heat Pump Review: A Quick Overview
The Cosy 6 heat pump, from Octopus Energy’s in-house range, offers a straightforward, neighbour-friendly solution for low-carbon heating, with R290 refrigerant and seamless app integration tailored to UK properties. Here’s a detailed review table summarising the essentials to guide your decision.
| Feature | Details |
|---|---|
| Key Models | Cosy 6 (6kW), Cosy 9 (9kW), Cosy 12 (12kW) |
| Efficiency | A+++ rating, SCOP up to 4.12 (real-world), COP up to 4.29 at 35°C |
| Unit Costs | £2,500-£4,500 (excl. VAT, installation, grants) |
| Installation Costs | £6,000-£10,000 total (incl. labour, cylinder, upgrades); £7,500 BUS grant eligible |
| Running Costs | £600-£1,000 annually (2,500-3,500kWh); 50-70% savings vs gas |
| Trustpilot Ratings | 4.6/5 (Octopus Energy) – high for support and efficiency |
| Which? Ratings | Commended for affordability and quiet operation in tests |
| Maintenance | Annual £100-£200; Octopus service plan £108/year |
| Best For | 1-4 bedroom homes; perfect for retrofits with good insulation |
| Warranty | 8 years product warranty (extendable with service plan) |
| Noise Levels | 53-56 dB(A) – compact and quiet for urban areas |
| Environmental Impact | R290 natural refrigerant (GWP 3); cuts CO2 by 80% vs fossils |
| Smart Features | Cosy Hub app, sensors, scheduling, and Cosy Octopus tariff integration |
For North East homes in Tyne and Wear or Newcastle, get in touch today with Future Heat Ltd for a free air source heat pump installation quote tailored to your location – our local team handles grants and installs with ease.
Why You Should Consider a Cosy 6 Heat Pump?
A Cosy 6 heat pump is a smart pick for affordable, UK-designed renewable heating that simplifies the switch to net-zero. Developed by Octopus Energy, a leading UK energy supplier founded in 2015, the Cosy range is manufactured in Northern Ireland, focusing on compact, efficient air source heat pumps with full end-to-end support from quote to maintenance.
Pros & Cons of Cosy 6 Heat Pumps
Pros
- Exceptional value with 8-year warranty and low running costs via the Cosy Octopus tariff.
- Ultra-compact design (855mm x 1125mm) for easy garden placement.
- Real-world SCOP up to 4.12, delivering reliable warmth in UK winters.
- Smart Cosy Hub with room sensors for precise zoning and energy tracking.
- Eco-friendly R290 refrigerant and 80% CO2 reduction.
- Backed by Octopus’s 5-star customer service for hassle-free ownership.
Cons
- Best for smaller homes; larger properties may need Cosy 9/12.
- Relies on Octopus tariff for max savings, limiting flexibility.
- Noise at 53dB could be noticeable in very quiet spots.
- Newer brand, so long-term data is emerging.
Cosy 6 Heat Pumps: Efficiency
The efficiency of Cosy 6 heat pumps impresses with A+++ ratings and real-world SCOP up to 4.12, producing over four times the heat from electricity. This Seasonal Coefficient of Performance beats many gas boilers, ideal for renewable heating in the North East. At 35°C flow, it hits COP 4.29, suiting underfloor or low-temp radiators.
In practice, users report 50-70% bill savings at 2026 tariffs, with Octopus data showing 3.5-4.1 SCOP in typical homes. Local insulation and the Cosy tariff enhance this; solar pairing via the app pushes it further. For Tyne and Wear properties, check your heat loss for optimal air-to-water performance.
Cosy 6 Heat Pump Costs
The costs of Cosy 6 heat pumps are competitive, especially post-grant, making renewables accessible for North East households. Units start at £2,500 for the 6kW model, with installations £3,500-£5,500.
Pre-grant totals £6,000-£10,000, reduced by £7,500 to as low as £0 for many. Running costs average £600-£1,000 yearly, boosted by the Cosy Octopus tariff’s off-peak rates. Here’s a pricing table for Cosy models:
| Model | Capacity (kW) | Unit Price (excl. VAT) | Estimated Installed Cost (pre-grant) | Best For |
|---|---|---|---|---|
| Cosy 6 | 6 | £2,500-£3,000 | £6,000-£7,500 | 1-4 bedroom homes |
| Cosy 9 | 9 | £3,000-£3,500 | £7,000-£8,500 | 3-5 bedroom properties |
| Cosy 12 | 12 | £3,500-£4,500 | £8,000-£10,000 | Larger or older homes |
Cosy 6 Heat Pumps Warranty
The warranty on Cosy 6 heat pumps is 8 years on the product, extendable with Octopus’s service plan. This covers manufacturing defects, with annual checks to maintain it. For North East installs, Future Heat Ltd can integrate this seamlessly.
Property Types Best Suited for Cosy 6 Heat Pumps
Cosy 6 heat pumps are best suited for 1-4 bedroom well-insulated semis or terraces, excelling in retrofits with radiators or underfloor. They handle North East winters in new builds or upgrades around Newcastle, ideal for small commercials. Landlords value the compact size and app for easy management. Uninsulated older homes need an EPC first.
Customer Ratings for Cosy 6 Heat Pumps
The ratings for Cosy 6 heat pumps highlight strong user satisfaction and value.
Trustpilot Ratings for Cosy 6 Heat Pumps
Trustpilot ratings for Octopus Energy average 4.6/5 from 50,000+ reviews, with Cosy owners praising quietness and savings.
Which? Ratings for Cosy 6 Heat Pumps
Which? ratings commend Cosy 6 for affordability and performance in UK heat pump evaluations.
Cosy 6 Air Source Heat Pump Range of Models
The Cosy 6 air source heat pump range of models includes three sizes for UK homes, all UK-made with R290 refrigerant and smart controls for efficient heating.
Here’s a table detailing the range:
| Model Series | Key Variants | Capacity (kW) | Refrigerant | Flow Temp (°C) | Noise (dB) | Best Use |
|---|---|---|---|---|---|---|
| Cosy 6 | Monobloc | 6 | R290 | Up to 70 | 53-56 | Small-medium homes |
| Cosy 9 | Monobloc | 9 | R290 | Up to 70 | 56 | Average families |
| Cosy 12 | Monobloc | 12 | R290 | Up to 70 | 60 | Larger retrofits |
Cosy 6 vs Other Brands
Cosy 6 heat pumps shine in affordability and UK support, but comparisons reveal tailored fits for North East scenarios. This aids internal linking.
Panasonic vs Cosy 6
Panasonic’s Aquarea range offers slightly higher peak efficiency (SCOP), but the Cosy 6 is often more affordable for the average homeowner thanks to Octopus’s vertically integrated pricing model.
Aira vs Cosy 6
Aira offers a 15-year comfort guarantee, which is significantly longer than the Cosy 6. However, the Cosy 6 is a British-made product with deeper integration into UK-specific smart tariffs.
Daikin vs Cosy 6
Daikin is the “gold standard” for quiet operation. While the Cosy 6 is very efficient, Daikin’s Altherma range is generally considered the more premium, quieter choice for very tight urban spaces.
Nibe vs Cosy 6
Nibe heat pumps are highly customizable for complex, large-scale systems. The Cosy 6 is a much simpler, “plug-and-play” solution designed for the average British semi-detached house.
Samsung vs Cosy 6
Samsung’s EHS Mono range is a strong competitor on price. However, the Cosy 6 uses the superior R290 refrigerant, whereas many Samsung units still use R32.
Mitsubishi vs Cosy 6
The Mitsubishi Ecodan is the UK’s best-seller. The Cosy 6 competes by offering a much higher flow temperature (75°C) than the standard Ecodan, making it better for radiator-based retrofits.
Viessmann vs Cosy 6
Viessmann offers German precision and high-end build quality. The Cosy 6 is aimed at a different market—those seeking the most cost-effective route to carbon-neutral heating.
Worcester Bosch vs Cosy 6
Worcester Bosch is a household name in the UK. While they have excellent support, their heat pump range is often more expensive to install than the subsidized Cosy 6 packages.
Hitachi vs Cosy 6
Hitachi Yutaki units are known for their robustness. The Cosy 6, however, wins on “smart” features and app-based control, which is a major factor for modern tech-savvy homeowners.
LG vs Cosy 6
LG offers very powerful units for large homes. The Cosy 6 is better suited for smaller properties where space and ease of use are the primary concerns.
Vaillant vs Cosy 6
Vaillant’s aroTHERM Plus also uses R290 refrigerant and is a top-tier rival. The choice often comes down to whether you want the independence of a Vaillant unit or the tariff-integrated “ecosystem” of the Cosy 6.
Midea vs Cosy 6
Midea provides the hardware for many other brands and is the “budget” king. The Cosy 6 offers a more polished software experience and better UK-based aftercare than many generic Midea installs.
Is a Cosy 6 Heat Pump Worth It?
A Cosy 6 heat pump is worth it for budget-friendly, smart renewables, but match it to your home. This buying guide gives expert advice.
Choose Cosy 6 if:
- Smaller 1-4 bedroom North East properties need compact, efficient heating.
- 8-year warranty and Cosy tariff for 50-70% savings matter.
- Smart sensors and app control fit your lifestyle.
- Grants make the switch affordable.
Don’t choose Cosy 6 if:
- Larger homes require higher kW; go Cosy 12.
- No Octopus account; tariff benefits are key.
- Ultra-quiet is essential; some rivals are lower.
- Premium features like purification are needed.
Ready to Install a Heat Pump? Get Your Free Quote from Future Heat
If you’re looking to install a heat pump, connect with Future Heat Ltd. We specialise in air source heat pump installations across Tyne and Wear, Newcastle, and the North East, they provide expert quotes and full support. Get in touch today for a free quote – start saving on energy now!
Frequently Asked Questions
How Does the Cosy Hub Improve Control?
The Cosy Hub uses room sensors for zoned heating, adjusting based on humidity and temp for precise comfort.
Can Cosy 6 Heat Pumps Work with Solar Panels?
Yes, Cosy 6 integrates with solar via the app, using excess power to heat water and cut grid reliance.
What Is the Cosy Octopus Tariff?
The Cosy Octopus tariff offers three off-peak periods daily, slashing heat pump running costs by shifting usage.
How Long Does a Cosy 6 Installation Take?
Cosy 6 installs typically take 2-4 days, with Octopus handling surveys and grants for minimal disruption.
Are Cosy Heat Pumps MCS Certified?
Yes, all Cosy models are MCS certified, ensuring eligibility for the £7,500 Boiler Upgrade Scheme.
Jamie Maguire is Managing Director at Future Heat Ltd, the UK-based renewable energy company specialising in heat pumps, solar panels and energy-efficient boiler solutions. He leads the company’s strategic vision to decarbonise homes and businesses across the UK by delivering innovative, sustainable heating and power systems. Jamie is passionate about shaping the future of energy, supporting communities and empowering teams of skilled engineers to deliver lasting value and carbon reductions nationwide.
