Most efficient heat pumps for radiators (55 °C)
1349 models in our database meet this; below the first 25 in order.
Criteria:
- Sorted by: SCOP (55 °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 (55 °C) | Rated output 55 °C | SCOP (35 °C) | Refrigerant |
|---|---|---|---|---|---|
| 1 | iDM iPump T 2-8 (Wasser / Wasser) | 6.35 | 10.4 kW | 7.93 | R410A |
| 2 | Hoval UltraSource T comfort (13) (Wasser / Wasser) | 6.33 | 10.4 kW | 7.92 | R410A |
| 3 | Hoval UltraSource T comfort (8) (Wasser / Wasser) | 6.33 | 10.4 kW | 7.92 | R410A |
| 4 | ELCO AQUATOP S06 | 6 | 6.07 kW | 6.28 | R410A |
| 5 | Ratiotherm WP Max-Cube pF26 (Wasser/Wasser) | 5.9 | 30 kW | 6.31 | R290 |
| 6 | Hoval UltraSource T comfort (17) (Wasser / Wasser) | 5.85 | 25.7 kW | 7.96 | R410A |
| 7 | iDM TERRA SWM 6-17 (Wasser / Wasser) | 5.85 | 25.7 kW | 7.98 | R410A |
| 8 | CTC EcoPart 7060 | 5.73 | 54.5 kW | 7.81 | R290 |
| 9 | iDM TERRA SW 20 Twin (Wasser / Wasser) | 5.73 | 24.7 kW | 7.92 | R410A |
| 10 | Waterkotte Industrial Line 8060.7 (Wasser/Wasser) | 5.73 | 54.5 kW | 7.81 | R290 |
| 11 | Thermia Mega E XL 400V | 5.68 | 79.55 kW | 7.78 | R454B |
| 12 | M-TEC VHPA27 W | 5.65 | 8.21 kW | 7.93 | R290 |
| 13 | M-TEC VHPA214 W | 5.64 | 16.19 kW | 7.86 | R290 |
| 14 | NIBE S1156-8 | 5.63 | 10 kW | 7.87 | R454B |
| 15 | M-TEC VHPA221 W | 5.62 | 24.28 kW | 7.86 | R290 |
| 16 | NIBE S1156-8 (Wasser / Wasser) | 5.62 | 10 kW | 7.87 | R454B |
| 17 | Thermia Mega E M 400V | 5.62 | 57.04 kW | 7.63 | R454B |
| 18 | M-TEC WHPA412 | 5.61 | 13.75 kW | 7.78 | R290 |
| 19 | M-TEC VHPA228 W | 5.6 | 31.99 kW | 7.82 | R290 |
| 20 | Thermia Sigrin 13 230V | 5.6 | 13.05 kW | 7.26 | R454C |
| 21 | iDM TERRA SW 35 Twin (Wasser / Wasser) | 5.58 | 43.6 kW | 7.45 | R410A |
| 22 | Thermia Mega E L 400V | 5.58 | 54.94 kW | 7.77 | R454B |
| 23 | NIBE F1153-6 PC | 5.55 | 7 kW | 6.95 | R407C |
| 24 | Ochsner AQUA FOX 312 HPLA S1 | 5.53 | 14 kW | 7.51 | R452B |
| 25 | Thermia Calibra E 12 230V | 5.52 | 14.24 kW | 7.51 | R452B |
More selections
- Quietest 4–6 kW heat pumps
- Most efficient 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)
- 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
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 28 Sept 2026
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026