Ochsner OLWI (18.5 kW)
Specifications and technical data
Air Source (ASHP)ResidentialR407C18.5 kW
| Manufacturer | Ochsner |
|---|---|
| Model | OLWI |
| Model code | OLWI 18 |
| Heat pump type | Air Source (ASHP) All Air Source heat pumps → |
| Application | Residential All Residential heat pumps → |
| Refrigerant | R407C All R407C heat pumps → |
| Mode | Heating only |
| Heating capacity | 18.5 kW |
| Max heating output (low temp) | 13.2 kW at A-7/W35 |
| COP (heating) | 4 at A7/W35 |
| SCOP (heating) | 3.93 at W35 |
| Operating range (air) | -20 to 40 °C |
| Heating flow temperature | up to 60 °C |
| Electrical supply | 380-415V (Three Phase) |
| Dimensions (H×W×D) | 1820 × 800 × 1240 mm |
| Operational Weight | 310 kg |
| Sound power level | 58 dB(A) (Sound Power LW(A)) |
| Data added | 28/07/2026 |
| Data source | Manufacturer datasheet |
| Verification | Verified by a human |
Check noise at a neighbour’s window (MCS 020 a) →
Ochsner OLWI 18 is a 16.6 kW compact air source heat pump with integral evaporator, using R407C refrigerant.
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Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.
Reviews & further reading
- Manufacturer OCHSNER Heat Pumps | Product overview — OchsnerCovers the wider Ochsner range
Alternatives to consider
Three Air Source (ASHP) heat pumps from other manufacturers closest in capacity to this one.
Vitocal 350-A (outdoor installation)
Viessmann · AWHO 351.A20
- Capacity
- 18.5 kW
- SCOP
- 3.24 (W35)
- Sound power
- 63 dB(A)
- Refrigerant
- R407C
Aerona3 R32 17kW
Grant · HPID17R32
- Capacity
- 18 kW
- SCOP
- 4.54 (W35)
- Sound power
- 61.6 dB(A)
- Refrigerant
- R32
- Price
- £4,407.34–£5,186.40
Ecodan R290 Monobloc
Mitsubishi Electric · PUZ-WZ85VAA
- Capacity
- 18 kW
- SCOP
- 4.47 (W35)
- Sound power
- 54 dB(A)
- Refrigerant
- R290
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