PowerGuide
Grant UK

Grant Aerona3

4.4 6kW

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

PowerGuide is reader-supported. We may earn a commission from links on this page — it never affects our rankings or what we recommend.

Specifications

Heat output 6 kW
Efficiency (SCOP) 3.7
Max flow temp 65 °C
Refrigerant R32
Noise 48 dB
Min operating temp -25 °C
Type Monobloc
Warranty 7 yrs

Our verdict

A dependable, fairly priced choice that UK installers know well. Efficiency trails the R290 leaders but it's a solid all-rounder backed by good support.

Pros

  • Good value
  • UK-optimised
  • Well-liked by installers

Cons

  • Lower SCOP
  • R32 refrigerant

Compare with alternatives