Airboot / RETURN Plenum Box (for Mitsubishi Heavy Industries FDUA100VH / FDUA125VH) — 353×903×30 / 2×Ø350 Internal Insulation

Description
The return airboot (plenum box), model MSPB353/350, measures 353×903×30 / 2×Ø350 and is internally lined with 5mm insulation. It is designed for Mitsubishi Heavy Industries FDUA100VH and FDUA125VH ducted units, functioning as a static pressure chamber that transitions the unit’s return opening to the duct system. By stabilizing static pressure and balancing return airflow, it reduces noise, minimizes condensation, and enhances overall system efficiency.

Applications

• Compatible with Mitsubishi Heavy Industries FDUA100VH / FDUA125VH 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 quiet operation and balanced airflow

Installation & Compatibility

• Rectangular inlet: 353×903×30mm

• Round outlets: Ø350mm ×2

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

• Matches Mitsubishi Heavy Industries FDUA100VH / FDUA125VH return openings

• Connects directly to ductwork and return grilles

Specifications

• Type: Return airboot / plenum box

• Model: MSPB353/350

• Material: Galvanized steel with internal insulation

• Insulation thickness: 5mm

• Rectangular inlet: 353×903×30mm

• Round outlets: Ø350mm ×2

• Compatible unit: Mitsubishi Heavy Industries FDUA100VH / FDUA125VH ducted units

• Application: HVAC return air distribution and static pressure stabilization