Hitachi air conditioners in the UK
Hitachi has 1215 split and multi-split families registered for the UK, and 0% pass England's 37 dB limit at 3 m from a neighbour's window. If you want the quietest 2.5 kW Hitachi, it is Hitachi RAF 2.5 kW (RAC-25FXE) at ≈59.0 dB(A).
manufacturer-declared, EPREL
What this brand has in the catalogue
1215 families, capacity 1.8–11.9 kW. Median outdoor sound power is ≈63.0 dB(A).
| Field | Value |
|---|---|
| Families | 1215 |
| Capacity | 1.8–11.9 kW |
| Median outdoor LwA | 63.0 dB(A) |
| Share passing 37 dB at 3 m | 0% |
| Refrigerants | R32, R410A |
| UK distribution page | https://www.hitachiaircon.com/uk/ |
Quietest model at each capacity
28 capacities have an outdoor sound power for Hitachi.
https://www.hitachiaircon.com/uk/ · snapshot 25 Sep 2026 · n=1215 · median outdoor LwA and the 3 m pass share use contract_engine, Q=2, no barrier; distribution URL is the brand_uk_distribution field · updated 25 Sep 2026 · version 1.0.0 · CSV of the values on this page
How this page was calculated
If the calculated sound pressure level at all assessment positions is equal to or lower than 37.0 dB(A) then the heat pump will comply with the Permitted Development noise limit
Quietest models
Better than a brand landing page: the 3 m pass share and the quietest model at each capacity are calculated, not claimed.