REMKO WKM 175 Pro vs STIEBEL ELTRON WPL-A 13.2 Plus HK 400
SCOP (35 °C): REMKO WKM 175 Pro 5.45, STIEBEL ELTRON WPL-A 13.2 Plus HK 400 4.89. Both models win equally often (6 of 14 points).
Who wins where
- REMKO WKM 175 Pro
- STIEBEL ELTRON WPL-A 13.2 Plus HK 400
Biggest differences
| Fact | WKM 175 Pro | WPL-A 13.2 Plus HK 400 |
|---|---|---|
| Refrigerant charge | 1.5 kg | 2.15 kg |
| Outdoor unit sound power | 58 dB(A) | 45 dB(A) |
| COP A-7/W35 | 3.54 | 3.11 |
| Rated output 55 °C | 13.04 kW | 14.84 kW |
| SCOP (35 °C) | 5.45 | 4.89 |
| Seasonal efficiency ηs 35 °C | 214 % | 193 % |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | REMKOWKM 175 Pro | STIEBEL ELTRONWPL-A 13.2 Plus HK 400 |
|---|---|---|
| Grants & market | ||
| Boiler Upgrade Scheme | £7,500 – £9,000 | £7,500 – £9,000 |
| General | ||
| Type (source) | Air-to-water 1 | Air-to-water 1 |
| Performance | ||
| Heating capacity (A7/W35) | – | 5.79 kW 2 |
| Rated output 35 °C | 14.33 kW 1 | 14.58 kW ✓ 1 |
| Rated output 55 °C | 13.04 kW 1 | 14.84 kW ✓ 1 |
| Min. outdoor temperature | – | -22 °C 2 |
| Efficiency | ||
| SCOP (35 °C) | 5.45 ✓ 1 | 4.89 1 |
| SCOP (55 °C) | 4.17 ✓ 1 | 4 1 |
| Seasonal efficiency ηs 35 °C | 214 % ✓ 1 | 193 % 1 |
| Seasonal efficiency ηs 55 °C | 164 % ✓ 1 | 157 % 1 |
| Energy label 35 °C | – | A, , , 2 |
| Energy label 55 °C | – | A, , , 2 |
| COP A7/W35 | 5.15 1 | 5.41 ✓ 1 |
| COP A2/W35 | 4.01 1 | 4.41 ✓ 1 |
| COP A-7/W35 | 3.54 ✓ 1 | 3.11 1 |
| Noise | ||
| Outdoor unit sound power | 58 dB(A) 1 | 45 dB(A) ✓ 1 |
| Refrigerant | ||
| Refrigerant | R290 1 | R290 1 |
| Refrigerant GWP | 3 3 | 3 2 |
| Refrigerant charge | 1.5 kg ✓ 1 | 2.15 kg 1 |
| Electrical | ||
| Max. power input | 5.4 kW 1 | 8.61 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
| Grants & market | ||
| ISDE grant (NL) | 3,925 € 3 | 4,150 € ✓ 3 |
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
- ISDE heat pump notification code list — Rijksdienst voor Ondernemend Nederland (RVO) · accessed 28 Sept 2026