STIEBEL ELTRON WPL-A 13 HK 400 Premium vs TCL THM14DFC
SCOP (35 °C): STIEBEL ELTRON WPL-A 13 HK 400 Premium 4.35, TCL THM14DFC 4.93. The TCL THM14DFC is better on 11 of 15 comparable points.
Who wins where
- STIEBEL ELTRON WPL-A 13 HK 400 Premium
- TCL THM14DFC
Biggest differences
| Fact | WPL-A 13 HK 400 Premium | THM14DFC |
|---|---|---|
| Refrigerant GWP | 698 | 3 |
| Refrigerant charge | 5 kg | 1.35 kg |
| Heating capacity (A7/W35) | 8.24 kW | 14 kW |
| COP A7/W35 | 4.61 | 7.49 |
| COP A2/W35 | 3.82 | 4.57 |
| Seasonal efficiency ηs 35 °C | 171 % | 194.2 % |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | STIEBEL ELTRONWPL-A 13 HK 400 Premium | TCLTHM14DFC |
|---|---|---|
| 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) | 8.24 kW 2 | 14 kW ✓ 3 |
| Rated output 35 °C | 14 kW 1 | 14.3 kW ✓ 1 |
| Rated output 55 °C | 14.8 kW ✓ 1 | 14 kW 1 |
| Min. outdoor temperature | – | -22 °C 3 |
| Efficiency | ||
| SCOP (35 °C) | 4.35 1 | 4.93 ✓ 1 |
| SCOP (55 °C) | 3.55 1 | 3.86 ✓ 1 |
| Seasonal efficiency ηs 35 °C | 171 % 1 | 194.2 % ✓ 1 |
| Seasonal efficiency ηs 55 °C | 139 % 1 | 151.5 % ✓ 1 |
| Energy label 35 °C | A, , 2 | A, , , 3 |
| Energy label 55 °C | A, , 2 | A, , , 3 |
| COP A7/W35 | 4.61 1 | 7.49 ✓ 1 |
| COP A2/W35 | 3.82 1 | 4.57 ✓ 1 |
| COP A-7/W35 | 3 ✓ 1 | 2.78 1 |
| Noise | ||
| Outdoor unit sound power | 55 dB(A) ✓ 1 | 56.98 dB(A) 1 |
| Refrigerant | ||
| Refrigerant | R452B 1 | R290 1 |
| Refrigerant GWP | 698 2 | 3 ✓ 3 |
| Refrigerant charge | 5 kg 1 | 1.35 kg ✓ 1 |
| Electrical | ||
| Max. power input | 7.1 kW 1 | 5.8 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
| Grants & market | ||
| ISDE grant (NL) | 3,950 € 4 | 4,150 € ✓ 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