Passive Dehumidification Wheels

G3MA Passive Desiccant Dehumidification Wheel (Patented)

The G3MA Passive Desiccant Dehumidification Wheel from DRI is a patent-protected innovation designed to deliver effective moisture removal without consuming regeneration energy. Unlike conventional desiccant systems, the G3MA wheel regenerates naturally using room return air at approximately 50% relative humidity, making it an ideal solution for energy-efficient fresh air treatment.

This unique passive regeneration capability allows significant dehumidification of incoming fresh air, even when the outdoor air is fully saturated—without heaters, thermal regeneration, or additional power consumption.

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Passive Desiccant Wheel

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Key Performance Benefits

Average moisture removal of ~14 gr/lb
Regenerates desiccant using room return air only
No electrical, steam, or thermal energy required
Removes moisture from 100% RH fresh air effectively
High-performance in-situ synthesized desiccant wheel
Fully water washable for easy maintenance
100% non-flammable construction
Desiccant does not leach or wash away, even under continuous wet or saturated air exposure

EcoDry Desiccant Rotor Technology

All DRI energy recovery wheels are fully certified, with certifications from Eurovent and the AHRI program available. Certification details can be accessed through our website, catalogues, or provided upon request

Media & Construction Features

Highly adsorbent, non-toxic, non-flammable, and fully water washable
pH-neutral honeycomb matrix for enhanced durability
In-situ synthesized metal silicate desiccant bonded to an inert inorganic fibre substrate
Active desiccant content ≥ 80% of total media weight for high moisture uptake and low heat carryover
Organic content limited to less than 2%, ensuring structural stability
No asbestos, no synthetic fibres, and no toxic salts such as lithium chloride
No organic burn-off or sintering process—preserves media strength and lifespan

Robust Mechanical Design

Integral long-life bearings supported on a fixed shaft for smooth operation
Simple slide-out rotor design for easy inspection or replacement
Full perimeter flange for added durability and safe ground handling
Smooth, uniform flange surface ensures long-lasting perimeter seals
Positive chain-drive rotation with perimeter teeth—slip-free and reliable
Edge-hardened media surface to reduce wear and extend seal and media life
Designed to withstand repeated temperature and humidity cycling without cracking or fracture

Sustainable & Long-Life Operation

DRI – Enabling Green Air Conditioning Worldwide

DRI is globally recognised for innovative Fresh Air Treatment and HVAC solutions that improve Indoor Air Quality (IAQ) while addressing today’s energy and environmental challenges. With decades of leadership in desiccant-based technologies, DRI continues to pioneer sustainable alternatives to conventional air-conditioning systems.

The G3MA Passive Desiccant Wheel is ideally suited for:

Hotels and hospitality spaces
Hospitals and healthcare facilities
Supermarkets and retail environments
Auditoriums and large assembly spaces
Commercial buildings with high fresh air demand
Controlled manufacturing areas such as pharmaceuticals, food processing, and electronics

How the G3MA Passive Desiccant Wheel Works

The G3MA Passive Desiccant Wheel (Patented) eliminates the need for thermal regeneration. Instead, it uses room return air at approximately 50% RH to naturally regenerate the desiccant media. This enables the wheel to continuously remove moisture from incoming fresh air—even at 100% relative humidity—without any additional energy input.

The result is efficient, sustainable dehumidification that significantly reduces HVAC energy consumption while maintaining superior indoor comfort and air quality.