The Hitachi Yutaki M 8kW (RASM-3VRE) is a 1-phase R32 monobloc air source heat pump from one of the world's most experienced HVAC manufacturers. As a true monobloc, the refrigerant circuit is factory-sealed in the outdoor unit — the installer only needs to connect water flow and return pipework indoors. No F-Gas certification is required for the system tie-in, simplifying installation.
This is the outdoor unit only. Pair with the matching PC-ARFH1E (4–8 kW controller) (sold separately). Sized for Typical 2 to 3 bedroom UK homes with average insulation.
BUS-Eligible
Grant Status
MCS-certified install required for BUS grant. To claim the £7,500 Boiler Upgrade Scheme grant the install must be carried out by an MCS-certified, Hitachi-approved installer. Warranty registration also requires Hitachi-approved commissioning.
Controller required separately — PC-ARFH1E (4–8 kW controller). The Yutaki M outdoor unit ships without a user interface. The matching PC-ARFH1E (4–8 kW controller) is a mandatory separate purchase — see the controller product listing for the variant that matches your kW band.
Hitachi global engineering, UK-supported. Hitachi is one of the largest HVAC manufacturers worldwide, with decades of inverter compressor experience. The Yutaki M platform inherits the same compressor technology used in Hitachi's commercial chiller range — delivering reliable modulation across the full UK climate envelope.
Why Choose the Hitachi Yutaki M 8kW
Hitachi inverter compressor
The same scroll inverter compressor platform used in Hitachi's commercial range — proven reliable and capable of smooth modulation from minimum to maximum output.
R32 refrigerant
Factory-charged R32 with lower Global Warming Potential than legacy R410A. Sealed monobloc circuit — no on-site refrigerant handling required.
Sealed monobloc design
All refrigerant work is completed at the Hitachi factory. The installer only connects water flow and return pipes indoors — installation is faster, simpler, and doesn't require F-Gas certification for the tie-in.
1-Phase 230V/400V supply
Standard single-phase 230V supply — fits any modern UK domestic installation.
FTC platform via PC-ARFH controller
Compatible with Hitachi's PC-ARFH1E (4–8 kW controller) wired controller for setpoint control, weather compensation, scheduling and DHW management.
CSNET Home compatible
Pair with the optional ATW-IOW-01 WiFi IoT Gateway (sold separately) for app-based remote monitoring and control via Hitachi CSNET Home.
8kW Yutaki M Specifications
| Technical Specifications |
| Manufacturer |
Hitachi |
| Model Code |
RASM-3VRE |
| Type |
Monobloc air source heat pump (outdoor unit only) |
| Rated Heating Output |
8 kW |
| Refrigerant |
R32, factory-sealed |
| Power Supply |
Single phase 230V 50Hz |
| Required Controller |
PC-ARFH1E (4–8 kW controller) |
| Smart Connectivity |
ATW-IOW-01 WiFi Gateway (optional, sold separately) |
| Configuration |
Air-to-water monobloc |
| BUS Grant Eligibility |
Yes, with MCS-certified install |
| Warranty |
Hitachi UK manufacturer warranty (subject to approved-installer commissioning) |
Frequently Asked Questions
Is Hitachi Yutaki MCS-certified for the BUS grant?
Yes — Hitachi Yutaki M is MCS-listed when installed by a certified MCS installer, qualifying the homeowner for the £7,500 Boiler Upgrade Scheme grant (subject to property eligibility).
Do I need a Hitachi-trained installer?
For warranty registration Hitachi requires the install and commissioning to be carried out by a Hitachi-approved engineer. Aizo can put you in touch with Hitachi-trained installers across the UK.
Is the controller included with the Yutaki M outdoor unit?
No — the Hitachi Unit Main Controller (PC-ARFH1E or PC-ARFH2E depending on kW) is a separate purchase. See our matching controller listings.
Can the Yutaki M run with my existing radiators?
In most cases yes, but radiators sized for an 80°C gas boiler may need uprating because heat pumps run at lower flow temperatures (typically 45–55°C on R32). A heat loss survey identifies which rooms (if any) need radiator upgrades.
Does the Yutaki M work with the Hitachi WiFi Gateway?
Yes — pair with the ATW-IOW-01 WiFi IoT Gateway (sold separately) for remote control, monitoring and integration with the Hitachi CSNET Home app.
