Inventor ATS14T/HU160T9 vs Viessmann IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.19-400-V002
SCOP (35 °C): Inventor ATS14T/HU160T9 4.72, Viessmann IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.19-400-V002 4.86. The Viessmann IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.19-400-V002 is better on 11 of 16 comparable points.
Who wins where
- Inventor ATS14T/HU160T9
- Viessmann IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.19-400-V002
Biggest differences
| Fact | ATS14T/HU160T9 | IDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.19-400-V002 |
|---|---|---|
| Refrigerant GWP | 675 | 3 |
| Heating capacity (A7/W35) | 14.5 kW | 9 kW |
| Outdoor unit sound power | 65 dB(A) | 48 dB(A) |
| COP A7/W35 | 4.7 | 6.3 |
| Seasonal efficiency ηs 55 °C | 136 % | 152 % |
| SCOP (55 °C) | 3.48 | 3.88 |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | InventorATS14T/HU160T9 | ViessmannIDU-A Hybrid HWMIW.A1.19-V054 ODU 250-A AWMOF-251.A1.19-400-V002 |
|---|---|---|
| Grants & market | ||
| Boiler Upgrade Scheme | £7,500 – £9,000 | £7,500 – £9,000 |
| General | ||
| Type (source) | Air-to-water 1 | Air-to-water 1 |
| System | – | Hybrid (with gas boiler) 1 |
| Performance | ||
| Heating capacity (A7/W35) | 14.5 kW ✓ 2 | 9 kW 3 |
| Rated output 35 °C | 13.73 kW ✓ 1 | 13.61 kW 1 |
| Rated output 55 °C | 12.08 kW 1 | 13.18 kW ✓ 1 |
| Min. outdoor temperature | -22 °C ✓ 2 | -20 °C 3 |
| Efficiency | ||
| SCOP (35 °C) | 4.72 1 | 4.86 ✓ 1 |
| SCOP (55 °C) | 3.48 1 | 3.88 ✓ 1 |
| Seasonal efficiency ηs 35 °C | 186 % 1 | 191 % ✓ 1 |
| Seasonal efficiency ηs 55 °C | 136 % 1 | 152 % ✓ 1 |
| Energy label 35 °C | A, , , 2 | A, , , 3 |
| Energy label 55 °C | A, , 2 | A, , , 3 |
| COP A7/W35 | 4.7 1 | 6.3 ✓ 1 |
| COP A2/W35 | 4.52 1 | 5 ✓ 1 |
| COP A-7/W35 | 2.79 1 | 2.8 ✓ 1 |
| Noise | ||
| Outdoor unit sound power | 65 dB(A) 1 | 48 dB(A) ✓ 1 |
| Indoor unit sound power | 43 dB(A) 1 | 40 dB(A) ✓ 1 |
| Refrigerant | ||
| Refrigerant | R32 1 | R290 1 |
| Refrigerant GWP | 675 2 | 3 ✓ 3 |
| Refrigerant charge | 1.84 kg ✓ 1 | 2 kg 1 |
| Electrical | ||
| Max. power input | 3.15 kW 1 | 1.71 kW 1 |
| Connectivity & smart | ||
| SG Ready | Yes 1 | Yes 1 |
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 28 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