REMKO HTS 135 vs STIEBEL ELTRON LWZ 07.1 Premium HKL 230
SCOP (35 °C): REMKO HTS 135 5.57, STIEBEL ELTRON LWZ 07.1 Premium HKL 230 4.2. The REMKO HTS 135 is better on 9 of 15 comparable points.
Who wins where
- REMKO HTS 135
- STIEBEL ELTRON LWZ 07.1 Premium HKL 230
Biggest differences
| Fact | HTS 135 | LWZ 07.1 Premium HKL 230 |
|---|---|---|
| Refrigerant GWP | 675 | 3 |
| Refrigerant charge | 1.75 kg | 1.24 kg |
| Seasonal efficiency ηs 35 °C | 219.9 % | 165 % |
| SCOP (35 °C) | 5.57 | 4.2 |
| Rated output 35 °C | 9.4 kW | 7.23 kW |
| Rated output 55 °C | 9 kW | 7.27 kW |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | REMKOHTS 135 | STIEBEL ELTRONLWZ 07.1 Premium HKL 230 |
|---|---|---|
| Grants & market | ||
| SEAI Heat Pump System Grant | €14,500 | €14,500 |
| General | ||
| Type (source) | Air-to-water 1 | Air-to-water 1 |
| Performance | ||
| Heating capacity (A7/W35) | – | 2.71 kW 2 |
| Rated output 35 °C | 9.4 kW ✓ 1 | 7.23 kW 1 |
| Rated output 55 °C | 9 kW ✓ 1 | 7.27 kW 1 |
| Efficiency | ||
| SCOP (35 °C) | 5.57 ✓ 1 | 4.2 1 |
| SCOP (55 °C) | 3.83 ✓ 1 | 3.28 1 |
| Seasonal efficiency ηs 35 °C | 219.9 % ✓ 1 | 165 % 1 |
| Seasonal efficiency ηs 55 °C | 150.1 % ✓ 1 | 128 % 1 |
| Energy label 35 °C | – | A, , 2 |
| Energy label 55 °C | – | A, , 2 |
| COP A7/W35 | 5.04 1 | 5.77 ✓ 1 |
| COP A2/W35 | 4.09 ✓ 1 | 3.97 1 |
| COP A-7/W35 | 3.3 ✓ 1 | 2.71 1 |
| Noise | ||
| Outdoor unit sound power | 58 dB(A) 1 | 56 dB(A) ✓ 1 |
| Indoor unit sound power | 54 dB(A) 1 | 53 dB(A) ✓ 1 |
| Refrigerant | ||
| Refrigerant | R32 1 | R290 1 |
| Refrigerant GWP | 675 3 | 3 ✓ 2 |
| Refrigerant charge | 1.75 kg 1 | 1.24 kg ✓ 1 |
| Electrical | ||
| Max. power input | 2.98 kW 1 | 12.55 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
| Grants & market | ||
| ISDE grant (NL) | 2,575 € ✓ 3 | 2,375 € 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