heatpumpdatabaseProduct data sheetheatpumpdatabase.com
Toshiba Estia 5 (4.5 kW)
Model code: HWS-455H-E
✓ BUS eligible✓ MCS listedAir Source (ASHP)ResidentialHeating & cooling
Heating capacity
4.97 kW
COP
4.9
A7/W35
Max flow temp
55°C
Sound power
64 dB(A)
Refrigerant
R410A
Boiler Upgrade Scheme
✓ BUS eligible
Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026).
PEL certificate: 011-1W0341-01
Grant also needs an MCS-certified installer and a qualifying system design.
MCS certification
✓ MCS listed
Certificate: 011-1W0341-01
| General | |
|---|---|
| Heat pump type | Air Source (ASHP) |
| Application | Residential |
| Refrigerant | R410A |
| Mode | Heating & cooling |
| Heating performance | |
| Heating capacity | 4.97 kW |
| Max heating output (low temp) | 4.97 kW at A2/W35 |
| COP (heating) | 4.9 at A7/W35 |
| Operating range (air) | -20 to 43 °C |
| Heating flow temperature | 20–55 °C |
| Cooling performance | |
| Cooling capacity | 4.5 kW |
| Max cooling output (high temp) | 4.5 kW at A35/W7 |
| EER (cooling) | 4.9 at A35/W7 |
| Cooling flow temperature | 7–25 °C |
| Electrical, acoustic and physical | |
| Electrical supply | 220-230V (Single Phase) |
| Sound power level | 64 dB(A) (Sound Power LW(A)) |
| Dimensions (H×W×D) | 630 × 800 × 300 mm |
| Operational Weight | 42 kg |
Test conditions: A = outdoor air °C, W = flow water °C (e.g. A7/W35 = 7°C air, 35°C flow). Compare COP and SCOP only at the same conditions.