Most efficient 4–6 kW heat pumps
161 models in our database meet this; below the first 25 in order.
Criteria:
- Rated output 35 °C from 4 up to 6 kW
- Sorted by: SCOP (35 °C) (highest 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 | SCOP (35 °C) | Rated output 35 °C | SCOP (55 °C) | Outdoor unit sound power | Refrigerant |
|---|---|---|---|---|---|---|
| 1 | NIBE F1153-4 | 7 | 5.2 kW | 5.45 | – | R407C |
| 2 | TCL THM4DF3dB | 5.8 | 5.2 kW | 4.37 | 51 dB(A) | R290 |
| 3 | TCL THM4DFB | 5.8 | 5.2 kW | 4.37 | 50.88 dB(A) | R290 |
| 4 | Vaillant VWS 53/8.1 iQ | 5.71 | 5.04 kW | 4.14 | – | R290 |
| 5 | Vaillant VWS 52/8.1 iQ | 5.59 | 5.04 kW | 4.07 | – | R290 |
| 6 | REMKO WKM 85 Pro | 5.35 | 5.17 kW | 4.2 | 52 dB(A) | R290 |
| 7 | STIEBEL ELTRON WPL-A 05.2 Plus HK 230 | 5.35 | 5.92 kW | 4.08 | 43 dB(A) | R290 |
| 8 | Tecalor TTL 5.1 ACS comfort | 5.35 | 5.92 kW | 4.08 | 43 dB(A) | R290 |
| 9 | Brötje BLW Eco-KP 4.2 | 5.34 | 5.3 kW | 4 | 48 dB(A) | R290 |
| 10 | Remeha Confida MB 400-4 | 5.34 | 5.3 kW | 3.99 | 48 dB(A) | R290 |
| 11 | Heliotherm H-MS-5 | 5.27 | 5 kW | 4.28 | – | R290 |
| 12 | SolaX ALT04-SF0 | 5.25 | 4.21 kW | 3.95 | 48 dB(A) | R290 |
| 13 | Axen KS-40W/EN7BP | 5.21 | 4.2 kW | 3.85 | 53 dB(A) | R290 |
| 14 | SolarEast BLN-004TC1 | 5.21 | 4.01 kW | 3.93 | 51 dB(A) | R290 |
| 15 | ait-deutschland alpha innotec SWCV 62H1 | 5.18 | 5.5 kW | 3.95 | – | R407C |
| 16 | Xtherma Flex-System 06 G2 | 5.18 | 5.7 kW | 3.9 | 49 dB(A) | R290 |
| 17 | Bosch Compress CS 7001i AW 7 OR (M/MS/E/B)-S | 5.16 | 5.43 kW | 3.65 | 47 dB(A) | R410A |
| 18 | Bosch CSH7000iAW 7 OR | 5.13 | 5.43 kW | 3.65 | 54 dB(A) | R410A |
| 19 | Buderus Logatherm WPL 6 ARB | 5.13 | 5.43 kW | 3.65 | 47 dB(A) | R410A |
| 20 | FoxESS HP1-5P-E | 5.13 | 5.1 kW | 3.95 | 49 dB(A) | R290 |
| 21 | SolaX ALT05-SF0 | 5.12 | 5 kW | 3.88 | 48 dB(A) | R290 |
| 22 | DVI Energi DVI BW-407-5 | 5.1 | 5.66 kW | 3.88 | – | R407C |
| 23 | Immergas Magis M5 Top | 5.1 | 5.5 kW | 3.6 | 46 dB(A) | R290 |
| 24 | Samsung AE050CXYDEK/EU + AE200DNWMPK/EU | 5.1 | 5.5 kW | 3.6 | 55 dB(A) | R290 |
| 25 | Thermia iTec XTR S 230-1 | 5.1 | 5.5 kW | 3.6 | 55 dB(A) | R290 |
More selections
- Quietest 4–6 kW heat pumps
- Quietest 6–8 kW heat pumps
- Most efficient 6–8 kW heat pumps
- Quietest 8–10 kW heat pumps
- Most efficient 8–10 kW heat pumps
- Quietest 10–14 kW heat pumps
- Most efficient 10–14 kW heat pumps
- Heat pumps with R290 (propane)
- Most efficient heat pumps for radiators (55 °C)
- Air-to-water heat pumps
- Ground-source heat pumps (brine-to-water)
- Water-to-water heat pumps (groundwater)
- Hybrid heat pumps (with a gas boiler)
Sources
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026