Precision temperature and humidity control air-conditioning unit

Cleanroom HVAC and Air Handling Equipment

Precision Temperature and Humidity Control Unit

A close-control air-conditioning unit that coordinates cooling, reheat, humidification and airflow to hold stable cleanroom temperature and moisture conditions.

Coordinated Cooling and Reheat
Stable Humidity Control
Modulating Airflow
Remote Monitoring Ready

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Product Introduction

The precision temperature and humidity control unit responds to small thermal and moisture changes that conventional comfort equipment may ignore. A modulating cooling stage removes sensible heat and moisture, reheat prevents overcooling during dehumidification, and humidification adds controlled moisture during dry conditions. Direct-drive fans maintain airflow through filter loading, while separate temperature and humidity sensors support stable control. The unit is suited to laboratories, metrology rooms and clean processes with narrow operating bands.

Key Features

Cooling and reheat outputs are coordinated to control moisture without allowing room temperature to drift.

Modulating valves, inverter compressors or staged circuits provide finer response than simple on-off control.

Remote supply and return sensors can distinguish room conditions from local unit casing effects.

Trendable alarms for temperature, humidity, airflow and filter loading support early intervention.

Solutions for Your Application

Tight environmental control requires all heating, cooling, humidifying and airflow functions to respond as one system rather than as independent devices.

Dehumidification lowers room temperature below the operating band.Modulating reheat offsets the sensible cooling remaining after moisture removal.

Oversized on-off cooling cycles cause repeated humidity swings.Variable or staged capacity matches smaller loads and reduces short cycling.

A sensor near the supply outlet does not represent the controlled workspace.Remote room sensors and averaged feedback are positioned at representative locations.

Filter loading changes airflow and alters coil moisture removal.Fan-speed control maintains airflow while differential-pressure monitoring signals service need.

Typical Applications

Metrology and calibration roomsPharmaceutical laboratoriesMedical-device inspectionElectronics test cleanroomsStability and environmental rooms

Technical Parameters

Typical insulated casing construction for a precision environmental control unit is listed below.

Core Material	Closed-cell polyurethane insulation in thermally separated equipment panels
Panel Thickness	40–60 mm insulated casing panel
Effective Width	700–2200 mm nominal unit width
Maximum Length	Up to 4500 mm overall equipment length
Steel Facing Thickness	0.6–1.0 mm coated steel casing skins
Core Density	40–45 kg/m³ closed-cell polyurethane
Thermal Conductivity	0.023–0.026 W/(m·K) for precision-unit casing insulation
Surface Finish	Textured powder-coated exterior with galvanized or stainless internal wet-section surfaces
Joint Type	Gasketed equipment panels with sealed coil section and flexible supply/return connections
Customization	Available based on the intended application and operating environment.

Available Options

Chilled-water or inverter DX coolingElectric, hot-water or hot-gas reheatSteam or electrode humidifierDuty/standby fan or refrigeration circuit arrangement

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