The quietest air source heat pumps in the UK (2026)
The quietest model we track is the Worcester Bosch Compress 5800i AW 7kW at 42 dB(A) declared sound power. Lower is quieter: every 3 dB(A) is roughly half the sound energy.
Get 3 free quotes from local MCS installersTakes 60 seconds, no obligation.Ranked: top 12 models
| # | Model | Size | Sound power | Installed price (before grant) |
|---|---|---|---|---|
| 1 | Worcester Bosch Compress 5800i AW 7kW | 7 kW | 42 dB(A) | £9,000 - £13,500 |
| 2 | LG Therma V R290 Monobloc 12kW | 12 kW | 49 dB(A) | Price on quote |
| 3 | NIBE S2125-8 | 8 kW | 49 dB(A) | Price on quote |
| 4 | NIBE S2125-12 | 12 kW | 49 dB(A) | Price on quote |
| 5 | LG Therma V R290 Monobloc 9kW | 9 kW | 50 dB(A) | Price on quote |
| 6 | Viessmann Vitocal 150-A 08 | 8 kW | 51 dB(A) | £10,000 - £15,000 |
| 7 | Panasonic Aquarea T-CAP M Series 12kW | 12 kW | 53 dB(A) | Price on quote |
| 8 | Panasonic Aquarea L Series 9kW | 9 kW | 54 dB(A) | Price on quote |
| 9 | Mitsubishi Electric Ecodan R290 8.5kW | 8.5 kW | 54 dB(A) | £9,000 - £13,000 |
| 10 | Daikin Altherma 3 H HT 14kW | 14 kW | 54 dB(A) | £10,000 - £14,000 |
| 11 | Ideal Logic Air 8kW | 8 kW | 55 dB(A) | Price on quote |
| 12 | Mitsubishi Electric Ecodan R290 10kW | 10 kW | 55 dB(A) | £10,000 - £14,000 |
SCOP and sound power from MCS product listings and manufacturer data; maximum flow temperature as the maker publishes it. Installed prices are modelled before the grant; your quote depends on your home. Last checked 2026-10-20.
What to look for
- Planning permitted development in England needs the unit to meet the MCS noise standard (42 dB at the nearest neighbouring window), so a quieter unit gives your installer more freedom on where it goes.
- Declared sound power is the unit's own output, measured the same way for every maker. What you hear also depends on distance, walls and siting.
- Smaller units are usually quieter, so compare models of the size your heat-loss survey calls for.
Compare the leaders head to head
Worcester Bosch vs LG Therma VSCOP, sound, price and warranty side by sideWorcester Bosch vs NIBE S2125SCOP, sound, price and warranty side by sideWorcester Bosch vs Viessmann VitocalSCOP, sound, price and warranty side by sideLG Therma V vs NIBE S2125SCOP, sound, price and warranty side by sideLG Therma V vs Viessmann VitocalSCOP, sound, price and warranty side by sideNIBE S2125 vs Viessmann VitocalSCOP, sound, price and warranty side by side
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