Cleanroom HVAC and Air Handling Equipment

Rooftop Air Handling Unit

A weatherproof outdoor air handler that places filtration and thermal treatment on the roof while preserving indoor production floor space.

Weatherproof Outdoor Casing
Roof-Curb Integration
Serviceable Roof Access
Configurable Air Treatment

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Product Introduction

A rooftop air handling unit packages the air-treatment sequence in a corrosion-protected, insulated enclosure designed for wind, rain, solar exposure and seasonal temperature extremes. Sloped roof panels, sealed service doors, intake hoods and base-frame drainage prevent water entry. Supply and return openings align with a roof curb or external duct risers, and access is arranged from a safe service side. The unit can be supply-only, recirculating or fitted with separated heat recovery according to the clean-facility ventilation strategy.

Key Features

Sloped weather caps and sealed exterior joints shed rain away from service openings.

A continuous structural base transfers unit load and seals to the roof curb or support steel.

UV-stable coating and corrosion-resistant fasteners protect the outdoor casing over long-term exposure.

Intake hoods, drainable coil sections and freeze protection support year-round outdoor operation.

Customer Product Concerns

Moving air-handling equipment outdoors saves internal space but exposes every casing joint, door and drain to weather.

Wind-driven rain enters around a flat service door or intake opening.Raised thresholds, compression seals and drained weather hoods protect the air path.

Solar heat and cold ambient conditions increase casing heat gain and condensation risk.Thick thermal-break panels reduce conduction through skins and frame profiles.

An uneven roof curb twists the unit base and opens panel joints.A rigid perimeter base and matched curb distribute load and provide a level sealing surface.

Routine filter or fan service requires unsafe access around the roof edge.All regular service points are grouped on the designated safe side of the unit.

Typical Applications

Clean manufacturing buildings with limited plant spacePharmaceutical roof plantsLaboratory ventilation systemsHealthcare clean facilitiesIndustrial outdoor-air treatment

Technical Parameters

Typical outdoor casing construction for a rooftop air handling unit is listed below.

Core Material	Closed-cell polyurethane or non-combustible mineral-wool insulation in double-skin weather casing
Panel Thickness	50–75 mm insulated weatherproof panel
Effective Width	1200–4000 mm nominal rooftop unit width
Maximum Length	Up to 14000 mm in weather-sealed shipping sections
Steel Facing Thickness	0.8–1.2 mm outer skin and 0.6–1.0 mm inner skin
Core Density	40–45 kg/m³ polyurethane or 92–120 kg/m³ mineral wool
Thermal Conductivity	0.022–0.040 W/(m·K), according to outdoor panel core
Surface Finish	UV-resistant polyester powder coat over galvanized or Aluzinc steel
Joint Type	Weather-gasketed thermal-break panels on a continuous bolted roof-base frame
Customization	Available based on the intended application and operating environment.

Available Options

Factory roof curb and vibration isolationSupply-only, mixed-air or heat-recovery layoutRain hood, bird screen and motorized dampersCold-climate preheat and freeze protection

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