Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 vs Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001
SCOP (35 °C): Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 4.44, Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001 4.44. The Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001 is better on 4 of 16 comparable points.
Both models in detail
Who wins where
- Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001
- Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001
Biggest differences
| Fact | Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 | Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001 |
|---|---|---|
| Outdoor unit sound power | 51 dB(A) | 48 dB(A) |
| SCOP (55 °C) | 3.5 | 3.58 |
| Seasonal efficiency ηs 55 °C | 137 % | 140 % |
Score per area = position (0–100) relative to all 1350 models in this category; higher is better.
| Technical specifications | ViessmannVitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 | ViessmannVitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001 |
|---|---|---|
| Grants & market | ||
| SEAI Heat Pump System Grant | €14,500 | €14,500 |
| General | ||
| Type (source) | Air-to-water1 | Air-to-water1 |
| Performance | ||
| Heating capacity (A7/W35) | 5.6 kW2 | 5.6 kW2 |
| Rated output 35 °C | 6.47 kW1 | 6.47 kW1 |
| Rated output 55 °C | 6.2 kW✓1 | 6.17 kW1 |
| Min. outdoor temperature | -20 °C2 | -20 °C2 |
| Efficiency | ||
| SCOP (35 °C) | 4.441 | 4.441 |
| SCOP (55 °C) | 3.51 | 3.58✓1 |
| Seasonal efficiency ηs 35 °C | 175 %1 | 176 %✓1 |
| Seasonal efficiency ηs 55 °C | 137 %1 | 140 %✓1 |
| Energy label 35 °C | A+++2 | A+++2 |
| Energy label 55 °C | A++2 | A++2 |
| COP A7/W35 | 6.21 | 6.21 |
| COP A2/W35 | 4.21 | 4.21 |
| COP A-7/W35 | 31 | 31 |
| Noise | ||
| Outdoor unit sound power | 51 dB(A)1 | 48 dB(A)✓1 |
| Indoor unit sound power | 40 dB(A)1 | 40 dB(A)1 |
| Refrigerant | ||
| Refrigerant | R2901 | R2901 |
| Refrigerant GWP | 32 | 32 |
| Refrigerant charge | 1.2 kg1 | 1.2 kg1 |
| Electrical | ||
| Max. power input | 1.19 kW1 | 1.14 kW1 |
| Connectivity & smart | ||
| SG Ready | Yes1 | Yes1 |
Frequently asked questions
Which is better: the Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 or the Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001?
SCOP (35 °C): Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 4.44, Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001 4.44. The Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001 is better on 4 of 16 comparable points.
What is the SCOP (35 °C) of the Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 and the Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001?
Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001: 4.44. Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001: 4.44.
Which is better on outdoor unit sound power: the Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 or the Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001?
Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001: 48 dB(A). Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001: 51 dB(A).
Which is better on SCOP (55 °C): the Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001 or the Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001?
Viessmann Vitocal 250-A IDU-A AWMIW.A1.19-V052 / ODU 250-A AWMOF-251.A1.08-230-V001: 3.58. Viessmann Vitocal 150-A IDU-A AWMIW.A1.19-V052 / ODU 150-A AWMOF-151.A1.08-230-V001: 3.5.
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How we collect and check this data →
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