Toshiba Estia 5 (4.5 kW)
Specifications and technical data
Also known as: HWS-455H-E / HWS-455XWHM3-E
✓ BUS eligibleAir Source (ASHP)ResidentialR410A4.97 kW
| Manufacturer | Toshiba |
|---|---|
| Model | Estia 5 (4.5 kW) |
| Model code | HWS-455H-E |
| Heat pump type | Air Source (ASHP) All Air Source heat pumps → |
| Application | Residential All Residential heat pumps → |
| Refrigerant | R410A All R410A heat pumps → |
| Mode | Heating & cooling |
| 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 |
| Electrical supply | 220-230V (Single Phase) |
| Cooling capacity | 4.5 kW |
| Max cooling output (high temp) | 4.5 kW at A35/W7 |
| Cooling flow temperature | 7–25 °C |
| EER (cooling) | 4.9 at A35/W7 |
| Dimensions (H×W×D) | 630 × 800 × 300 mm |
| Operational Weight | 42 kg |
| Sound power level | 64 dB(A) (Sound Power LW(A)) |
| Data added | 2026-10-21 |
| Data source | Toshiba ESTIA product data sheet (EN) |
| Verification | Verified by a human |
| Boiler Upgrade Scheme | ✓ BUS eligible — Listed on the Ofgem BUS Product Eligibility List (24 Sep 2026). Grant also needs an MCS-certified installer and a qualifying system design. Funding guide |
| PEL certificate no. | 011-1W0341-01 |
| MCS certification | ✓ MCS listed |
| MCS certificate no. | 011-1W0341-01 |
Check noise at a neighbour’s window (MCS 020 a) →
Toshiba Estia 5 (4.5 kW) R410A split air-to-water heat pump outdoor unit HWS-455H-E, 4.5 kW nominal at A7/W35, flow up to 55 °C, heating and cooling.
✎ Suggest a correction to this data
Data is compiled from manufacturer sources and may contain errors or gaps. Always confirm specifications with the manufacturer before making decisions.
Alternatives to consider
Three Air Source (ASHP) heat pumps from other manufacturers closest in capacity to this one.
Compress 5800i AW
Bosch · CS5800iAW 4 OR-S
- Capacity
- 4.99 kW
- SCOP
- 4.58 (W35)
- Sound power
- 40 dB(A)
- Refrigerant
- R290
iTec XTR
Thermia · iTec XTR S
- Capacity
- 1–5 kW
- SCOP
- 5.1 (W35)
- Sound power
- 75 dB(A)
- Refrigerant
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Split Aqua
Haier · AU052FYCRA(HW)
- Capacity
- 5 kW
- SCOP
- 4.59 (W35)
- Sound power
- 61 dB(A)
- Refrigerant
- R32
- Price
- ~£1,430.11
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