Viessmann Climate SolutionsIDU-A Hybrid HWMIW.A1.19-V054 / ODU 250-A AWMOF-251.A1.13-230-V002
The Viessmann Climate Solutions IDU-A Hybrid HWMIW.A1.19-V054 / ODU 250-A AWMOF-251.A1.13-230-V002 is an air-to-water heat pump with a SCOP of 4.96 (35 °C) and a sound power level of 50 dB(A). Under permitted development the limit is 42 dB(A) measured 1 m from the nearest neighbouring habitable-room window. Free-standing, the indicative minimum distance is 1.0 m; against a wall 1.4 m.
Key figures
- SCOP (35 °C)
- 4.96
Seasonal efficiency: how much heat you get per kWh of electricity across a heating season.
- Outdoor unit sound power
- 50dB(A)Official source
- Refrigerant
- R290Official source
- Rated output 35 °C
- 12.42kWOfficial source
- Rated output 55 °C
- 12.1kWOfficial source
Rules in the UK
These rules are still being verified.
Minimum distance to your neighbour
Permitted development rights + MCS 020 planning standard · 1 m from the nearest neighbouring habitable-room window
Indicative calculation (hemispherical, no barriers). Not a substitute for an MCS 020 assessment. Source
Boiler Upgrade Scheme
UnknownFixed grant towards installation; check current amount with Ofgem. Ofgem
Technical specifications
| General | ||
|---|---|---|
| Type | Air-to-water | BAFA |
| Compressors | 1 | BAFA |
| Capacity control | Inverter | BAFA |
| Performance | ||
| Rated output 35 °C | 12.42 kW | BAFA |
| Rated output 55 °C | 12.1 kW | BAFA |
| Efficiency | ||
| SCOP (35 °C) | 4.96 | BAFA |
| SCOP (55 °C) | 3.93 | BAFA |
| Seasonal efficiency ηs 35 °C | 195 % | BAFA |
| Seasonal efficiency ηs 55 °C | 154 % | BAFA |
| COP A7/W35 | 6.5 | BAFA |
| COP A2/W35 | 5 | BAFA |
| COP A-7/W35 | 3.1 | BAFA |
| Noise | ||
| Outdoor unit sound power | 50 dB(A) | BAFA |
| Indoor unit sound power | 40 dB(A) | BAFA |
| Refrigerant | ||
| Refrigerant | R290 | BAFA |
| Refrigerant charge | 2 kg | BAFA |
| Electrical | ||
| Max. power input | 1.56 kW | BAFA |
| Connectivity & smart | ||
| SG Ready | Yes | BAFA |
Frequently asked questions
Can I install the Viessmann Climate Solutions IDU-A Hybrid HWMIW.A1.19-V054 / ODU 250-A AWMOF-251.A1.13-230-V002 without planning permission?
Under Permitted development rights + MCS 020 planning standard the unit must not exceed 42 dB(A) 1 m from the nearest neighbouring habitable-room window. With a sound power of 50 dB(A) that indicatively means 1.0 m free-standing, 1.4 m against a wall or 2.0 m in a corner. Your MCS installer must confirm this.
Which refrigerant does the Viessmann Climate Solutions IDU-A Hybrid HWMIW.A1.19-V054 / ODU 250-A AWMOF-251.A1.13-230-V002 use?
The Viessmann Climate Solutions IDU-A Hybrid HWMIW.A1.19-V054 / ODU 250-A AWMOF-251.A1.13-230-V002 uses R290.