Airboot / RETURN Plenum Box (for Mitsubishi Heavy Industries FDU71VH) — 210×750×30 / 1×Ø350 Internal Insulation

Description
The return airboot (plenum box), model MSDUR71, measures 210×750×30 / 1×Ø350 and is internally lined with 5mm insulation. Designed for Mitsubishi Heavy Industries FDU71VH ducted units, this plenum box functions as a static pressure chamber that transitions the unit’s return opening to the duct system. It balances airflow, stabilizes static pressure, reduces noise, and minimizes condensation, ensuring smooth and efficient operation.

Applications

• Compatible with Mitsubishi Heavy Industries FDU71VH ducted units

• Return air distribution in residential, office, and retail ceiling systems

• HVAC return air connections in commercial and public buildings

• Ideal for projects requiring balanced airflow and quiet operation

Installation & Compatibility

• Rectangular inlet: 210×750×30mm

• Round outlet: Ø350mm ×1

• Internal 5mm insulation layer for condensation prevention and thermal performance

• Matches Mitsubishi Heavy Industries FDU71VH return opening

• Connects directly to ductwork and return grilles

Specifications

• Type: Return airboot / plenum box

• Model: MSDUR71

• Material: Galvanized steel with internal insulation

• Insulation thickness: 5mm

• Rectangular inlet: 210×750×30mm

• Round outlet: Ø350mm ×1

• Compatible unit: Mitsubishi Heavy Industries FDU71VH ducted units

• Application: HVAC return air distribution and static pressure stabilization