Concealed Duct FCU with Field-Reversible Piping Zero Rework 7 Speed DC Duct FCU Matches Airflow to As Built Conditions

Concealed ducted systems are where an energy model meets as-built reality, and the gap usually shows up as airflow that does not match the design. The Midea Medium Static Pressure Duct Fan Coil Unit is built to close that gap rather than pass it to the commissioning report. On AC models, water connections reverse from left to right on site; on DC models, external static pressure is selectable at 12, 30 or 50Pa through the PCB or wired controller. Return air draws from the rear or the bottom. When the duct run grows two extra bends or the riser lands on the wrong side, the unit is set to suit it, so no unit is left running against a resistance it was not configured for. One family spans 400-1200 CFM with cooling capacities from 2.35 to 13.78 kW across the AC and DC range.

At 241mm body height (261mm for DC) the chassis hides above standard ceiling grids, while three-row and four-row coil options match two-pipe or four-pipe hydraulics across new-build and retrofit work. The enlarged drain pan option is cheap insurance against the call-back that undoes a fit-out: condensation stains on a finished ceiling, and the tile and insulation that go to waste with them. The filter assembly extracts in multiple directions, so maintenance access works however the void was built, which keeps the unit at rated performance instead of slowly starving for air between service visits.

The DC inverter brushless range provides seven fan speeds for balancing each zone at commissioning, up to 30% lower fan energy, and native V8 controller integration for jobs pairing FCUs with Midea VRF outdoor systems. XYE and PQE ports simplify central control and Modbus RTU handover, so the ducted terminals report into the same monitoring platform as the rest of the plant. Standard supply is 220-240V / 1Ph / 50Hz; for export contracts Hongtai provides OEM/ODM support with custom voltages from 180-440V at 50/60Hz, project branding and protocol options. ERP and RoHS compliance is standard across the range.

• Up to 30% Lower Fan Energy (DC) — Brushless drive plus seven speeds keeps each zone at the airflow it actually needs.
• Selectable ESP 12/30/50Pa (DC) — Set static pressure at commissioning to the as-built ductwork; no unit running against unplanned resistance.
• Seven-Speed Balancing — Zones trimmed to real load instead of a single fixed speed, so part-load hours cost less.
• ERP and RoHS Compliant — Documentation ready for European tenders and green procurement review.
• XYE / PQE Ports — Central control and Modbus RTU handover, so concealed terminals are metered with the rest of the building.
• Site-Reversible Water Connections (AC) — Left/right reversal on site; no re-ordering and no discarded equipment.
• Rear or Bottom Return Air — Adapts to as-built void conditions without custom plenum fabrication.
• Enlarged Drain Pan Option — Protects the finished ceiling below, and the material that would be replaced with it.

Start with the duct layout and the metering requirement. Where runs are short and direct and 3-speed control is enough, the AC range is the rugged default, and its on-site left/right piping reversal is genuine site-proofing. Where duct layouts are complex, part-load hours dominate, or the project reports energy intensity by zone, specify the DC inverter brushless range: external static selectable at 12/30/50Pa, seven speeds for precise balancing, up to 30% fan energy saving, and native V8 integration for combined FCU and VRF tenders. Coil options, connections and service access are shared, so the motor choice changes the operating profile, not the installation.

1. Concealed Office Ceilings — Hidden units preserve ceiling aesthetics; zone-level balancing keeps part-load hours efficient.
2. Hotel Guestroom Ducted Installs — Quiet DC operation above the corridor ceiling with easy filter access from the room side.
3. Retail Units Behind Bulkheads — Multi-branch ducting serves sales areas from concealed positions with one metered terminal per zone.
4. Apartments and Serviced Suites — One SKU covers varied flat layouts thanks to site-flexible connections.
5. Hospitals and Clinics — Optional filtration and low-noise DC models suit clinical environments with continuous operation.

• CE Marking — European conformity for safety and electromagnetic compatibility.
• Eurovent Certified Performance — Third-party verified capacity and efficiency ratings.
• ERP Compliant — Meets EU Energy-related Products Directive requirements.
• RoHS Compliant — Restriction of Hazardous Substances directive conformance.
• GB/T 19232 — Chinese national standard for fan coil unit performance testing.

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