Axen KS-40W/EN7BP vs Power World PW020-DKZLRS-E/S
SCOP (35 °C): Axen KS-40W/EN7BP 5.21, Power World PW020-DKZLRS-E/S 5.03. The Axen KS-40W/EN7BP is better on 8 of 14 comparable points.
Who wins where
- Axen KS-40W/EN7BP
- Power World PW020-DKZLRS-E/S
Biggest differences
| Fact | KS-40W/EN7BP | PW020-DKZLRS-E/S |
|---|---|---|
| Refrigerant charge | 0.61 kg | 0.5 kg |
| COP A-7/W35 | 3.57 | 3.26 |
| COP A2/W35 | 5.19 | 4.79 |
| Outdoor unit sound power | 53 dB(A) | 49 dB(A) |
| Rated output 55 °C | 4.4 kW | 4.15 kW |
| COP A7/W35 | 6.47 | 6.83 |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | AxenKS-40W/EN7BP | Power WorldPW020-DKZLRS-E/S |
|---|---|---|
| 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 kW 2 | 4.02 kW ✓ 3 |
| Rated output 35 °C | 4.2 kW ✓ 1 | 4.18 kW 1 |
| Rated output 55 °C | 4.4 kW ✓ 1 | 4.15 kW 1 |
| Efficiency | ||
| SCOP (35 °C) | 5.21 ✓ 1 | 5.03 1 |
| SCOP (55 °C) | 3.85 ✓ 1 | 3.69 1 |
| Seasonal efficiency ηs 35 °C | 205 % ✓ 1 | 198.1 % 1 |
| Seasonal efficiency ηs 55 °C | 151 % ✓ 1 | 144.5 % 1 |
| Energy label 35 °C | A, , , 2 | A, , , 3 |
| Energy label 55 °C | A, , , 2 | A, , 3 |
| COP A7/W35 | 6.47 1 | 6.83 ✓ 1 |
| COP A2/W35 | 5.19 ✓ 1 | 4.79 1 |
| COP A-7/W35 | 3.57 ✓ 1 | 3.26 1 |
| Noise | ||
| Outdoor unit sound power | 53 dB(A) 1 | 49 dB(A) ✓ 1 |
| Refrigerant | ||
| Refrigerant | R290 1 | R290 1 |
| Refrigerant GWP | 3 2 | 3 3 |
| Refrigerant charge | 0.61 kg 1 | 0.5 kg ✓ 1 |
| Electrical | ||
| Max. power input | 4.9 kW 1 | 2.5 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
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