Best Water Source Heat Pumps by SCOP (2026)
Top 10 of 189 qualifying products · updated 2026-10-13
Water-to-water heat pumps up to 100 kW — domestic through to light commercial — ranked by SCOP at a 35°C flow temperature. Large chiller-based plant is excluded so like is compared with like. Only products with a published SCOP at W35 are included.
Every figure comes from the manufacturer’s published specification as recorded in the Heat Pump Database; near-identical variants (e.g. single- and three-phase versions with the same result) are shown once. The list updates automatically as new products are added.
| # | Model | Capacity | SCOP (W35) | Refrigerant | Noise |
|---|---|---|---|---|---|
| 1 |  Ochsner AQUA FOX 416 HPLA S1 | 18.11 kW | 7.78 | R452B | 38 dB(A) |
| 2 | Ochsner AQUA FOX 312 HPLA S1 | 14.24 kW | 7.51 | R452B | 36 dB(A) |
| 3 |  M-Tec WPS-W1052-AK | 13–70 kW | 7.35 | R410A | |
| 4 |  Rhoss MidiFLOW-PI THHITP 140 | 44.7 kW | 7.32 | R290 | |
| 5 | M-Tec WPS-W1036-AK | 13–49 kW | 7.21 | R410A | |
| 6 | Rhoss MidiFLOW-PI THHITP 125 | 30.1 kW | 7.17 | R290 | |
| 7 | Rhoss MidiFLOW-PI THHITP 145 | 51.2 kW | 7.13 | R290 | |
| 8 | M-Tec WHPA618 | 6–22 kW | 7.1 | ||
| 9 | Rhoss MidiFLOW-PI THHITP 130 | 35.1 kW | 7.04 | R290 | |
| 10 | M-Tec WHPA412 | 4–14 kW | 7 |