Best Ground Source Heat Pumps by SCOP (2026)
Top 10 of 156 qualifying products · updated 2026-10-13
Ground source (brine-to-water) heat pumps up to 25 kW — the domestic and light-commercial range — ranked by SCOP at a 35°C flow temperature. Only products with a published SCOP at W35 are included, so every unit is compared on the same basis.
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 |  Kronoterm ETERA-L-3F (400V) | 9.1–18.2 kW | 6.22 | R452B | 35 dB(A) |
| 2 |  M-Tec DHPA618 | 5–18 kW | 6.2 | ||
| 3 |  Thermia Atlas | 4–18 kW | 6.15 | R410A | 36 dB(A) |
| 4 | M-Tec DHPA412 | 3–12 kW | 6.1 | ||
| 5 | M-Tec WPD618 | 5–20 kW | 6.03 | R410A | |
| 6 | Thermia Calibra E | 4–16 kW | 5.96 | R452B | 36 dB(A) |
| 7 | Thermia Calibra E | 2–8 kW | 5.87 | R452B | 33 dB(A) |
| 8 | Thermia Atlas | 3–12 kW | 5.86 | R410A | 33 dB(A) |
| 9 | Thermia Calibra E | 3–12 kW | 5.85 | R452B | 35 dB(A) |
| 10 | Kronoterm ETERA M UF | 6.1–12.2 kW | 5.85 | R452B | 34 dB(A) |