Cosy 6
Octopus's own-brand R290 monobloc paired with a single-vendor install, smart Cosy tariff and one warranty. The 'don't make me think' option.
- SCOP (35°C)
- 5.00
- Running cost
- £1,090/yr
- Installed
- From £7,500 after grant, fixed-price install
Editorial render. Not a manufacturer photograph; we do not redistribute press imagery without a licence.
Primary question · Is the full-stack Octopus install actually the easiest way to get a heat pump?
Anyone who'd rather have one phone number to call and is happy on an Octopus tariff.
From £7,500 after grant, fixed-price install
- Single accountable vendor
- Strong tariff integration (Cosy)
- Fixed-price surveys
- Less choice of installer
- Coverage still expanding region-by-region
Open the cost planner to estimate your installed price.
Key specifications
- Output
- 6 kW @ A7/W35
- SCOP (35°C)
- 5.00
- Sound at 1 m
- 32 dB(A) min
- Refrigerant
- R290 (propane)
- , Single accountable vendor
- , Strong tariff integration (Cosy)
- , Fixed-price surveys
- , Less choice of installer
- , Coverage still expanding region-by-region
Vaillant★★★★★aroTHERM plus 7 kW- SCOP (35°C)
- 5.05
- Running cost
- £1,180/yr
1970s–2000s 3-bedWell-insulated semisQuiet neighbourhoodsReadHouse Verdict9.3/10
Samsung★★★★★EHS Mono HT Quiet R290 (8 kW)- SCOP (35°C)
- 4.95
- Running cost
- £1,140/yr
Value-driven retrofitsLarger 4-bed homesCost-sensitive ownersReadHouse Verdict8.2/10
If your brief matches "anyone who'd rather have one phone number to call and is happy on an octopus tariff.", the Cosy 6 is a confident pick. If it doesn't, the alternatives above are more honest answers.
Estimate your installed cost
The planner uses your specific home; not a brochure number.