Octopus Cosy 6 vs Vaillant aroTHERM Plus
A side-by-side look at the Octopus Cosy 6 and Vaillant aroTHERM Plus. Winning figures are highlighted.
| Octopus Energy Octopus Cosy 6 | Vaillant Vaillant aroTHERM Plus | |
|---|---|---|
| Price from | — | — |
| Heat output | 6 kW | 7 kW |
| Efficiency (SCOP) | 4.1 | 4 |
| Max flow temp | 65 °C | 65 °C |
| Refrigerant | R290 | R290 |
| Noise | 42 dB | 46 dB |
| Min operating temp | -20 °C | -25 °C |
| Type | Monobloc | Monobloc |
| Warranty | 7 yrs | 10 yrs |
Octopus Cosy 6
The value disruptor. Octopus's bundled install plus the grant can make a heat pump astonishingly cheap, and the Cosy 6 itself is a capable R290 unit. Best if you're an Octopus customer.
Full Octopus Cosy 6 review →Vaillant aroTHERM Plus
Our top pick for most homes. The R290 refrigerant hits high flow temperatures without wrecking efficiency, so it works in older properties that haven't had radiators upsized. Long warranty seals it.
Full Vaillant aroTHERM Plus review →