Cleanroom HVAC and Air Handling Equipment

Ceiling-Mounted Air Handling Unit

A low-profile horizontal air handler that places filters, coil and fan above a ceiling where plant-room floor area is unavailable.

Low-Profile Casing
Bottom Service Access
Direct-Drive Fan
Condensate-Safe Installation

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Product Introduction

The ceiling-mounted air handling unit condenses the required filter, coil, drain pan and fan functions into a shallow casing suspended above a corridor or support area. Hinged or removable lower panels provide service access without requiring side clearance. A direct-drive fan avoids belt maintenance in the restricted ceiling void, while a full-width drain pan and correctly trapped outlet protect the ceiling below. Flexible connections and vibration isolators limit structure-borne noise.

Key Features

A shallow horizontal casing uses ceiling-void space while preserving occupied floor area.

Bottom-access filters and fan assemblies can be serviced from a defined ceiling hatch.

A full-width sloped drain pan controls condensate beneath the cooling coil.

Direct-drive EC or plug fans provide airflow turndown without belt adjustment overhead.

Customer Product Concerns

Ceiling equipment must remain shallow, drain reliably and permit maintenance from below without contaminating the occupied space.

Side-mounted filters cannot be removed because ducts and services fill the ceiling void.Bottom-access filter tracks align with a dedicated service hatch.

A blocked drain causes water to damage the ceiling below.A sloped pan, trapped primary drain and optional overflow switch provide layered condensate protection.

Fan vibration is audible through the ceiling structure.Spring or rubber isolators and flexible duct connections decouple the unit from the building.

A deep fan section cannot fit between structure and ceiling.Compact backward-curved direct-drive fans reduce total casing height.

Typical Applications

Cleanroom support corridorsLaboratory ceiling voidsMedical clean spacesSmall production suitesRetrofit ventilation zones

Technical Parameters

Representative construction ranges for a low-profile ceiling air handler are shown below.

Core Material	Closed-cell polyurethane or mineral-wool acoustic insulation within double-skin casing
Panel Thickness	25–50 mm insulated low-profile panel
Effective Width	700–2200 mm nominal casing width
Maximum Length	Up to 5000 mm overall suspended length
Steel Facing Thickness	0.5–0.75 mm galvanized or coated sheet skins
Core Density	38–44 kg/m³ polyurethane or 64–90 kg/m³ mineral wool
Thermal Conductivity	0.023–0.040 W/(m·K) according to insulation
Surface Finish	Powder-coated galvanized outer casing with smooth galvanized inner liner
Joint Type	Gasketed folded-panel joints with bottom-access doors and flexible duct collars
Customization	Available based on the intended application and operating environment.

Available Options

Chilled-water or DX cooling coilElectric or hot-water heating coilEC fan and constant-airflow controlPrimary and secondary drain-pan protection

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