STIEBEL ELTRON LWZ 07.1 Premium HKWL 230 vs Waterkotte EcoTouch Air Bloc 7008 (230V)
SCOP (35 °C): STIEBEL ELTRON LWZ 07.1 Premium HKWL 230 4.2, Waterkotte EcoTouch Air Bloc 7008 (230V) 5. The Waterkotte EcoTouch Air Bloc 7008 (230V) is better on 10 of 15 comparable points.
Who wins where
- STIEBEL ELTRON LWZ 07.1 Premium HKWL 230
- Waterkotte EcoTouch Air Bloc 7008 (230V)
Biggest differences
| Fact | LWZ 07.1 Premium HKWL 230 | EcoTouch Air Bloc 7008 (230V) |
|---|---|---|
| Heating capacity (A7/W35) | 2.71 kW | 5.02 kW |
| Refrigerant charge | 1.24 kg | 0.8 kg |
| Indoor unit sound power | 53 dB(A) | 35 dB(A) |
| COP A-7/W35 | 2.71 | 3.26 |
| Seasonal efficiency ηs 35 °C | 165 % | 197 % |
| Outdoor unit sound power | 56 dB(A) | 47 dB(A) |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | STIEBEL ELTRONLWZ 07.1 Premium HKWL 230 | WaterkotteEcoTouch Air Bloc 7008 (230V) |
|---|---|---|
| General | ||
| Type (source) | Air-to-water 1 | Air-to-water 1 |
| Performance | ||
| Heating capacity (A7/W35) | 2.71 kW 2 | 5.02 kW ✓ 3 |
| Rated output 35 °C | 7.23 kW 1 | 7.3 kW ✓ 1 |
| Rated output 55 °C | 7.23 kW ✓ 1 | 7 kW 1 |
| Min. outdoor temperature | – | -22 °C 3 |
| Efficiency | ||
| SCOP (35 °C) | 4.2 1 | 5 ✓ 1 |
| SCOP (55 °C) | 3.28 1 | 3.85 ✓ 1 |
| Seasonal efficiency ηs 35 °C | 165 % 1 | 197 % ✓ 1 |
| Seasonal efficiency ηs 55 °C | 128 % 1 | 151.2 % ✓ 1 |
| Energy label 35 °C | A, , 2 | A, , , 3 |
| Energy label 55 °C | A, , 2 | A, , , 3 |
| COP A7/W35 | 5.77 ✓ 1 | 4.87 1 |
| COP A2/W35 | 3.97 ✓ 1 | 3.87 1 |
| COP A-7/W35 | 2.71 1 | 3.26 ✓ 1 |
| Noise | ||
| Outdoor unit sound power | 56 dB(A) 1 | 47 dB(A) ✓ 1 |
| Indoor unit sound power | 53 dB(A) 1 | 35 dB(A) ✓ 1 |
| Refrigerant | ||
| Refrigerant | R290 1 | R290 1 |
| Refrigerant GWP | 3 2 | 3 3 |
| Refrigerant charge | 1.24 kg 1 | 0.8 kg ✓ 1 |
| Electrical | ||
| Max. power input | 12.55 kW 1 | 3.68 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
| Grants & market | ||
| ISDE grant (NL) | 2,375 € 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