STIEBEL ELTRON WPL-A 10.2 Plus HK 400 vs TCL THM12DFC
SCOP (35 °C): STIEBEL ELTRON WPL-A 10.2 Plus HK 400 4.96, TCL THM12DFC 5.04. The TCL THM12DFC is better on 9 of 16 comparable points.
Who wins where
- STIEBEL ELTRON WPL-A 10.2 Plus HK 400
- TCL THM12DFC
Biggest differences
| Fact | WPL-A 10.2 Plus HK 400 | THM12DFC |
|---|---|---|
| Heating capacity (A7/W35) | 4.32 kW | 12 kW |
| COP A7/W35 | 5.4 | 7.66 |
| Outdoor unit sound power | 46 dB(A) | 54.97 dB(A) |
| Refrigerant charge | 1.6 kg | 1.35 kg |
| COP A-7/W35 | 3.15 | 2.83 |
| Rated output 55 °C | 11.5 kW | 12.5 kW |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | STIEBEL ELTRONWPL-A 10.2 Plus HK 400 | TCLTHM12DFC |
|---|---|---|
| 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) | 4.32 kW 2 | 12 kW ✓ 3 |
| Rated output 35 °C | 11.66 kW 1 | 12.3 kW ✓ 1 |
| Rated output 55 °C | 11.5 kW 1 | 12.5 kW ✓ 1 |
| Min. outdoor temperature | -22 °C 2 | -22 °C 3 |
| Efficiency | ||
| SCOP (35 °C) | 4.96 1 | 5.04 ✓ 1 |
| SCOP (55 °C) | 4 ✓ 1 | 3.9 1 |
| Seasonal efficiency ηs 35 °C | 195 % 1 | 198.7 % ✓ 1 |
| Seasonal efficiency ηs 55 °C | 157 % ✓ 1 | 153.2 % 1 |
| Energy label 35 °C | A, , , 2 | A, , , 3 |
| Energy label 55 °C | A, , , 2 | A, , , 3 |
| COP A7/W35 | 5.4 1 | 7.66 ✓ 1 |
| COP A2/W35 | 4.54 1 | 4.68 ✓ 1 |
| COP A-7/W35 | 3.15 ✓ 1 | 2.83 1 |
| Noise | ||
| Outdoor unit sound power | 46 dB(A) ✓ 1 | 54.97 dB(A) 1 |
| Refrigerant | ||
| Refrigerant | R290 1 | R290 1 |
| Refrigerant GWP | 3 2 | 3 3 |
| Refrigerant charge | 1.6 kg 1 | 1.35 kg ✓ 1 |
| Electrical | ||
| Max. power input | 6.83 kW 1 | 5.4 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
| Grants & market | ||
| ISDE grant (NL) | 3,475 € 4 | 3,700 € ✓ 4 |
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
- 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