Cleanroom HVAC and Air Handling Equipment

Air-to-Air Plate Heat Recovery Unit

A complete four-port heat-recovery cabinet that routes outdoor and exhaust air through separate formed-aluminum passages with service, filtration, drainage and bypass provisions.

Four-Port Cabinet Layout
Formed Aluminum Plate Core
Dual-Side Service Access
Drain and Bypass Options

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Product Introduction

The air-to-air plate heat recovery unit combines a formed aluminum plate core, four duct connections and separate outdoor/supply and return/exhaust chambers inside one insulated galvanized-steel cabinet. Corrugated plates create alternating passages that transfer sensible heat across the metal surface, while internal folds, seals and gaskets minimize air leakage between the two paths. Removable access panels expose the filters, exchanger faces and condensate section for inspection. A sloped drain pan and optional bypass damper support wet operation, free cooling and cold-weather control without dismantling the ductwork.

Key Features

A four-port casing organizes outdoor, supply, return and exhaust connections for direct integration into a balanced ventilation layout.

Corrugated aluminum plates and mechanically folded, sealed edges provide useful transfer area while limiting internal leakage.

Full-size access panels and upstream filter rails keep both exchanger faces reachable for inspection and cleaning.

A sloped condensate section accepts a trapped drain, while an optional bypass path supports economizer and frost-control modes.

Customer Product Concerns

A complete plate-recovery cabinet must control leakage direction, drainage, frost and maintenance access while fitting four connected air paths into a compact plant-space footprint.

An unfavorable pressure balance can drive residual internal leakage toward the clean supply-air path.Gasketed partitions and sealed plate folds minimize leakage, while maintaining the clean side at the higher pressure directs any residual leakage toward exhaust.

Water retained below the exhaust-side plate face restricts airflow and can contaminate the cabinet floor.Correct core orientation, a sloped stainless drain pan and a properly trapped outlet remove condensate from the wet section.

Winter frost progressively blocks narrow plate channels and upsets the intended supply-to-exhaust balance.A controlled bypass, upstream preheat or staged airflow response keeps the exhaust-side leaving condition above the selected frost limit.

A fixed cabinet installed between four ducts can make filters and plate faces difficult to reach.Removable service panels on the selected access side expose filter tracks, drain components and both faces of the recovery core.

Typical Applications

Laboratory outdoor and general exhaust-air recoveryPharmaceutical support-area ventilationMedical-device manufacturing HVACClean corridors and packaging roomsIndustrial ventilation requiring separated air streams

Technical Parameters

Typical construction ranges for a complete compact plate heat recovery cabinet are listed below.

Core Material	Formed aluminum plate core in an insulated galvanized-steel cabinet with separate outdoor/supply and return/exhaust chambers
Panel Thickness	30–50 mm insulated cabinet and removable access-panel construction
Effective Width	1700–2200 mm overall cabinet width for common compact configurations
Maximum Length	Up to 1490 mm overall cabinet depth in the airflow-connection direction
Steel Facing Thickness	0.8–1.2 mm galvanized or zinc-magnesium-coated cabinet skins
Core Density	2700 kg/m³ aluminum plate material
Thermal Conductivity	Approximately 205 W/(m·K) for the aluminum heat-transfer plates
Surface Finish	Mill-finish or epoxy-coated aluminum core with powder-coated or zinc-magnesium-coated cabinet surfaces
Joint Type	Gasketed four-port cabinet with internally sealed crossflow or counterflow plate pack, removable access panels and drain pan
Customization	Available based on the intended application and operating environment.

Available Options

Crossflow or counterflow aluminum plate coreStandard or epoxy-coated exchanger surfacesInternal bypass damper with actuatorLeft-hand or right-hand service access with condensate drain

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