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Heat pumps · 178 models

Quietest 6–8 kW heat pumps

178 models in our database meet this; below the first 25 in order.

Criteria:

  • Rated output 35 °C from 6 up to 8 kW
  • Sorted by: Outdoor unit sound power (lowest first)

Only models for which these figures are known. This is a ranking by data, not a test or recommendation; the source of every value is on the product page.

# Model1,2 Outdoor unit sound power Rated output 35 °CSCOP (35 °C)Refrigerant
1 Bosch CS7000iAW 9 IRB-S 36 dB(A) 7.3 kW4.48R410A
2 Bosch CS7000iAW 9 IRMB 36 dB(A) 7.3 kW4.27R410A
3 Buderus Logatherm WLW196i-8 IRB 36 dB(A) 7.3 kW4.48R410A
4 Buderus Logatherm WLW196i-8 IRTP120 36 dB(A) 7.3 kW4.27R410A
5 Bosch Compress 6800 AW 5 OR-S-Hybrid 42 dB(A) 6.2 kW4.16R290
6 Bosch Compress 6800 AW 7 OR-S-Hybrid 42 dB(A) 6.6 kW4.2R290
7 Bosch Compress CS5800iAW 5 ORE-S (AW 5 OR-S + CS5800iAW 12 E) 42 dB(A) 6.2 kW4.57R290
8 Bosch Compress CS5800iAW 5 ORM-S (AW 5 OR-S + CS5800iAW 12 M) 42 dB(A) 6.2 kW4.55R290
9 Bosch Compress CS5800iAW 5 ORMB-S (AW 5 OR-S + CS5800iAW 12 MB) 42 dB(A) 6.2 kW4.55R290
10 Bosch Compress CS5800iAW 7 ORE-S (AW 7 OR-S + CS5800iAW 12 E) 42 dB(A) 6.6 kW4.58R290
11 Bosch Compress CS5800iAW 7 ORMB-S (AW 7 OR-S + CS5800iAW 12 MB) 42 dB(A) 6.6 kW4.56R290
12 Bosch Compress CS6800iAW 7 ORE-S (AW 7 OR-S + CS6800iAW 12 E) 42 dB(A) 6.6 kW4.58R290
13 Bosch Compress CS6800iAW 7 ORM-S (AW 7 OR-S + CS6800iAW 12 M) 42 dB(A) 6.6 kW4.56R290
14 Bosch Compress CS6800iAW 7 ORMB-S (AW 7 OR-S + CS6800iAW 12 MB) 42 dB(A) 6.6 kW4.56R290
15 Bosch CS5800iAW 5 OR210 MP-S 42 dB(A) 6.2 kW4.3R290
16 Bosch CS5800iAW 5 ORE-S 42 dB(A) 6.2 kW4.57R290
17 Bosch CS5800iAW 5 ORM-S 42 dB(A) 6.2 kW4.55R290
18 Bosch CS5800iAW 5 ORMB-S 42 dB(A) 6.2 kW4.55R290
19 Bosch CS5800iAW 7 OR210 MP-S 42 dB(A) 6.6 kW4.11R290
20 Bosch CS5800iAW 7 ORE-S 42 dB(A) 6.6 kW4.58R290
21 Bosch CS5800iAW 7 ORM-S 42 dB(A) 6.6 kW4.56R290
22 Bosch CS5800iAW 7 ORMB-S 42 dB(A) 6.6 kW4.56R290
23 Bosch CSH5800iAW 5 42 dB(A) 6.2 kW4.41R290
24 Bosch CSH5800iAW 7 42 dB(A) 6.6 kW4.43R290
25 Buderus HC HYC20 IT-5 42 dB(A) 6.2 kW4.41R290

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Sources

  1. Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
  2. List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026