R290 3.5 kW (12,000 BTU) air conditioners in the UK: 13 models
ElectriQ EIQ 3.5 kW (EIQ-12WMINVEX-V5) leads this R290 list SEER 8.6, and 13 models at 3.5 kW (12,000 BTU) use R290. If sound matters more than the refrigerant, sort by the outdoor dB column.
computed
Ranked models
13 models match this list. R290 only, then outdoor sound power.
EPREL manufacturer-declared registrations · snapshot 25 Sep 2026 · n=13 · R290 only, then outdoor sound power; noise via contract_engine MCS 020a Q=2, no barrier · 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
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Better than a best-of roundup with no figures: every row is a registered number and a link to the model card.