Cleanroom HVAC and Air Handling Equipment

Evaporative Media Humidifier

A high-capacity in-duct humidifier that passes air through uniformly wetted corrugated media for low-energy moisture addition and evaporative cooling.

Uniform Wetted Media
High-Capacity Adiabatic Output
Low Electrical Demand
Accessible Cassette and Sump

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Product Introduction

Water is distributed along the top of corrugated media cassettes and flows downward over a large structured surface. Unsaturated air passes through the wetted channels and evaporates part of the water, increasing humidity while reducing dry-bulb temperature. Excess water drains to a stainless sump for recirculation or single-pass discharge, and a downstream separator captures entrained droplets.

Key Features

Deep corrugated media provides a large evaporation surface without high-pressure pumps or steam generation.

A full-width distribution header wets each cassette evenly and minimizes dry bypass strips.

The stainless sump, pump and drain connections are exposed below the media for cleaning.

Individual cassettes slide out of the support frame for inspection or replacement.

Customer Product Concerns

Wetted-media systems need even water distribution, hygienic drainage and adequate face area to avoid dry zones or droplet carryover.

Uneven water distribution leaves dry media and unstable output.A balanced top header feeds each full-height cassette across the complete face.

Standing sump water accumulates solids and microbial growth.Smooth stainless surfaces, controlled bleed, periodic drain and accessible cleaning limit stagnation.

Excess face velocity carries water into downstream ductwork.Correct module area and a dedicated droplet separator retain entrained moisture.

Scaling blocks media channels and raises pressure drop.Water-quality control, bleed rate and removable cassettes support planned cleaning or replacement.

Typical Applications

Large cleanroom make-up air unitsData-center evaporative coolingPharmaceutical ventilation systemsIndustrial process-air humidificationLow-energy laboratory air handlers

Technical Parameters

Typical construction ranges for an in-duct recirculating evaporative media module are shown below.

Core Material	Inorganic glass-fiber or cellulose evaporative media in stainless steel cassette frame
Panel Thickness	1.2-2.0 mm stainless module and sump panel thickness
Effective Width	500-4000 mm active media face width
Maximum Length	Up to 5000 mm overall multi-cassette module length
Steel Facing Thickness	1.2-2.0 mm 304 stainless frame and sump
Core Density	35-80 kg/m³ typical structured evaporative-media density
Thermal Conductivity	Approximately 0.04-0.08 W/(m·K) for dry structured media
Surface Finish	Passivated stainless frame with blue-green impregnated corrugated media
Joint Type	Bolted flanged module with slide-out media cassettes, welded sump and union-connected header
Customization	Available based on the intended application and operating environment.

Available Options

Recirculating or direct-water configurationGlass-fiber or treated cellulose mediaStainless droplet separator and conductivity controlSingle or multiple cassette banks with access section

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