Best Air Source Heat Pumps (2026)

We rank air source heat pumps on the specs that matter, value for money and reliability. Here's where we'd put our money this year.

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No. 1

Vaillant · 7kW

One of the most efficient heat pumps on UK sale: natural R290 refrigerant, 65°C flow temperature and a class-leading SCOP — well suited to retrofits.

A4.7 ~£11,000

No. 2

Mitsubishi Electric · 8.5kW R290

The UK's most-installed heat pump — proven reliability and the deepest installer network, now with an efficient R290 model.

A4.6 ~£11,500

No. 3

Octopus Energy · 6kW

Octopus's own 6kW R290 heat pump, usually fitted by Octopus — with the £7,500 grant the all-in price often lands close to a new gas boiler.

A4.6 ~£9,500

No. 4

Daikin · 8kW

Delivers up to 70°C flow even in deep cold, making it a strong choice for older homes with existing radiators and high demand.

A4.5 ~£12,000

No. 5

Grant UK · 6kW

UK-climate-optimised monobloc with a long warranty and a strong reputation among independent installers.

B4.4 ~£10,500

No. 6

Samsung · 8kW

Competitive R290 monobloc with 70°C flow and good efficiency, often keenly priced against the big names.

B4.3 ~£11,000