Corridor and perimeter zones are usually the first systems a design team fixes and the last to receive detailed attention, which is why a terminal unit that can be specified from verified data saves weeks of coordination. The Midea One-way Cassette Fan Coil Unit is a 153mm-deep chassis with single-direction discharge, sized for the narrow ceiling voids above corridors, lift lobbies, entry foyers and retail perimeters where a four-way cassette cannot be accommodated. Across the combined AC and DC range the unit covers 300–600 CFM and 2.65–5.20 kW of cooling, so one schedule line replaces several one-off selections, and the Eurovent-certified performance figures allow the unit to be written into a performance specification without inviting an equivalent-product argument at tender.
Hydraulically the unit integrates without special provisions: G1/2" coil connections, a 1.6 MPa maximum working pressure that sits comfortably inside normal closed-loop chilled and low-temperature hot water practice, a two-row coil, and 220–240V / 1Ph / 50Hz single-phase supply drawing 32–40W on AC models and 14–38W on DC. The 750mm condensate lift pump is factory-fitted rather than a schedule item, which removes gravity fall from the ceiling void design and takes away the most common cause of water staining on newly finished ceilings. AC and DC variants share the same body dimensions, the same pipe positions and the same pump, so a late motor-tier decision never disturbs coordinated drawings.
The motor tier is the one genuine design decision. AC models offer proven three-speed control at the lowest capital cost; the DC brushless version provides seven speeds through the KJR-75A wired controller, a minimum draw of 14W, fan energy reduced by up to 30% and sound pressure 2–5 dB(A) lower than the AC equivalent — figures that support an energy or acoustic clause in the specification rather than an aspiration. Where a project demands non-standard voltage, protocol or branding, Hongtai supports OEM/ODM supply with custom voltages from 180–440V at 50/60Hz, Modbus RTU and BACnet, so the schedule can name the local grid and the building protocol without a derogation.
Where the specification is silent on fan energy, the AC three-speed version satisfies the duty at the lowest capital cost and with a control philosophy every operator already understands. Where the specification carries an energy or acoustic performance clause, the DC brushless version is the defensible selection: seven speeds for commissioning balance, 14W at minimum speed, up to 30% lower fan energy and 2–5 dB(A) lower sound pressure — all achieved without changing the 153mm body, the 750mm pump or the G1/2" connections. Because the two tiers are dimensionally identical, the motor decision can be deferred to tender stage without reissuing coordinated ceiling and hydraulic drawings.
A: It is independent third-party verification of cooling and heating capacity, airflow and sound under defined test conditions, published as a certificate rather than a catalogue claim. It lets a design team check the scheduled duty against a verifiable source, and it complements the GB/T 19232 performance testing the range is also measured to.
A: 1.6 MPa covers normal closed-loop chilled and low-temperature hot water operation, so the terminal unit does not set the pressure class of the branch. Confirm the system test pressure and safety-valve setting against it and the unit sits inside both without a pressure-reducing arrangement or a separate high-pressure variant.
A: The 750mm lift pump is factory-fitted as standard and is not a selectable extra. In practice it removes the need to design a fall across long corridor runs, so the drainage design is simplified rather than duplicated, and no condensate pump appears as a separate schedule item.
A: Specify outcomes rather than a single model reference: brushless DC motor, seven discrete fan speeds through the KJR-75A wired controller, minimum power input 14W, fan energy at least 30% below the AC equivalent, and sound pressure 2–5 dB(A) lower. Any compliant supplier can then be assessed on published data.
A: 220–240V / 1Ph / 50Hz throughout, with 32–40W on AC models and 14–38W on DC models. Size final circuits and control panels from those figures plus the condensate pump and any motorised valve actuator fitted to the branch.
| Parameter | AC Series | DC Series |
|---|---|---|
| Airflow Range | 300–400 CFM | 300–600 CFM |
| Cooling Capacity | 3.04–3.79 kW | 2.65–5.20 kW |
| Heating Capacity | 5.13–6.41 kW | 3.15–5.75 kW |
| Power Input | 32–40 W | 14–38 W |
| Sound Pressure Level (H) | 36–37 dB(A) | 33.5–44.6 dB(A) |
| Power Supply | 220–240V / 1Ph / 50Hz | 220–240V / 1Ph / 50Hz |
| Drain Pump Head | 750 mm | 750 mm |
| Body Height | 153 mm | 153 mm |
| Coil Rows | 2 | 2 |
| Max. Working Pressure | 1.6 MPa | 1.6 MPa |
| Motor Type | Low-noise 3-speed AC | DC Brushless |
| Pipe Connection | G1/2" | G1/2" |








Corridor and perimeter zones are usually the first systems a design team fixes and the last to receive detailed attention, which is why a terminal unit that can be specified from verified data saves weeks of coordination. The Midea One-way Cassette Fan Coil Unit is a 153mm-deep chassis with single-direction discharge, sized for the narrow ceiling voids above corridors, lift lobbies, entry foyers and retail perimeters where a four-way cassette cannot be accommodated. Across the combined AC and DC range the unit covers 300–600 CFM and 2.65–5.20 kW of cooling, so one schedule line replaces several one-off selections, and the Eurovent-certified performance figures allow the unit to be written into a performance specification without inviting an equivalent-product argument at tender.
Hydraulically the unit integrates without special provisions: G1/2" coil connections, a 1.6 MPa maximum working pressure that sits comfortably inside normal closed-loop chilled and low-temperature hot water practice, a two-row coil, and 220–240V / 1Ph / 50Hz single-phase supply drawing 32–40W on AC models and 14–38W on DC. The 750mm condensate lift pump is factory-fitted rather than a schedule item, which removes gravity fall from the ceiling void design and takes away the most common cause of water staining on newly finished ceilings. AC and DC variants share the same body dimensions, the same pipe positions and the same pump, so a late motor-tier decision never disturbs coordinated drawings.
The motor tier is the one genuine design decision. AC models offer proven three-speed control at the lowest capital cost; the DC brushless version provides seven speeds through the KJR-75A wired controller, a minimum draw of 14W, fan energy reduced by up to 30% and sound pressure 2–5 dB(A) lower than the AC equivalent — figures that support an energy or acoustic clause in the specification rather than an aspiration. Where a project demands non-standard voltage, protocol or branding, Hongtai supports OEM/ODM supply with custom voltages from 180–440V at 50/60Hz, Modbus RTU and BACnet, so the schedule can name the local grid and the building protocol without a derogation.
Where the specification is silent on fan energy, the AC three-speed version satisfies the duty at the lowest capital cost and with a control philosophy every operator already understands. Where the specification carries an energy or acoustic performance clause, the DC brushless version is the defensible selection: seven speeds for commissioning balance, 14W at minimum speed, up to 30% lower fan energy and 2–5 dB(A) lower sound pressure — all achieved without changing the 153mm body, the 750mm pump or the G1/2" connections. Because the two tiers are dimensionally identical, the motor decision can be deferred to tender stage without reissuing coordinated ceiling and hydraulic drawings.
A: It is independent third-party verification of cooling and heating capacity, airflow and sound under defined test conditions, published as a certificate rather than a catalogue claim. It lets a design team check the scheduled duty against a verifiable source, and it complements the GB/T 19232 performance testing the range is also measured to.
A: 1.6 MPa covers normal closed-loop chilled and low-temperature hot water operation, so the terminal unit does not set the pressure class of the branch. Confirm the system test pressure and safety-valve setting against it and the unit sits inside both without a pressure-reducing arrangement or a separate high-pressure variant.
A: The 750mm lift pump is factory-fitted as standard and is not a selectable extra. In practice it removes the need to design a fall across long corridor runs, so the drainage design is simplified rather than duplicated, and no condensate pump appears as a separate schedule item.
A: Specify outcomes rather than a single model reference: brushless DC motor, seven discrete fan speeds through the KJR-75A wired controller, minimum power input 14W, fan energy at least 30% below the AC equivalent, and sound pressure 2–5 dB(A) lower. Any compliant supplier can then be assessed on published data.
A: 220–240V / 1Ph / 50Hz throughout, with 32–40W on AC models and 14–38W on DC models. Size final circuits and control panels from those figures plus the condensate pump and any motorised valve actuator fitted to the branch.
| Parameter | AC Series | DC Series |
|---|---|---|
| Airflow Range | 300–400 CFM | 300–600 CFM |
| Cooling Capacity | 3.04–3.79 kW | 2.65–5.20 kW |
| Heating Capacity | 5.13–6.41 kW | 3.15–5.75 kW |
| Power Input | 32–40 W | 14–38 W |
| Sound Pressure Level (H) | 36–37 dB(A) | 33.5–44.6 dB(A) |
| Power Supply | 220–240V / 1Ph / 50Hz | 220–240V / 1Ph / 50Hz |
| Drain Pump Head | 750 mm | 750 mm |
| Body Height | 153 mm | 153 mm |
| Coil Rows | 2 | 2 |
| Max. Working Pressure | 1.6 MPa | 1.6 MPa |
| Motor Type | Low-noise 3-speed AC | DC Brushless |
| Pipe Connection | G1/2" | G1/2" |







