Commercial Direct Expansion Air Handling Unit

Modular Desiccant Wheel Dehumidification Unit

Modular moisture control using a desiccant wheel and regeneration air circuit.

Overview

The modular desiccant wheel dehumidification unit provides continuous moisture removal for applications where a cooling coil alone is not sufficient. Process air passes through a slowly rotating desiccant medium, which adsorbs water vapour before the drier air leaves the treatment section.

A separate heated regeneration airstream removes the retained moisture from another zone of the wheel and carries it outdoors. As the wheel rotates between the process and regeneration zones, adsorption and regeneration continue as a repeating cycle. This arrangement allows moisture control to be coordinated with the required supply-air temperature.

The catalogue includes basic and combined units, with optional filtration, pre-cooling, post-cooling and mixing sections. Electric or steam regeneration can be selected according to the available utilities and project operating strategy.

PRODUCT DETAILS

Product Features

Continuous desiccant process

The rotating moisture-adsorbing medium moves between treatment and regeneration zones. This provides ongoing drying instead of relying on a material that must be removed and replaced after every operating cycle.

Separate regeneration circuit

A dedicated fan and heater supply regeneration air to remove moisture from the wheel. The regeneration airflow, heat source and exhaust route are designed together with the process-air duty.

Modular treatment arrangement

Pre-cooling, post-cooling, filtration, fan and mixing sections can be combined around the moisture-control section. This allows the unit to address temperature and humidity as related design requirements.

Choice of regeneration heat

The catalogue lists electric and steam heating options. The appropriate arrangement depends on the site’s utilities, regeneration duty, operating hours and the selected equipment configuration.

Insulated cabinet construction

An aluminium-alloy frame and double-skin insulated panels support the modular assembly. Thermal-bridge control and a sealed wheel arrangement help manage unwanted heat transfer and air bypass.

Optional monitoring and controls

PLC control and selected alarms can support fan, heater and rotor operation. Options include humidity control, rotor-stop or filter alerts, remote operation and monitoring of selected temperatures.

MODEL DATA

Technical Specifications

LF standard desiccant wheel dehumidification series. Catalogue pages 35–36.

Swipe tables horizontally to view all specifications.

Moisture Removal and Regeneration
Model	Moisture removal (kg/h)	Process airflow (m³/h)	Electric regeneration (kW)	Steam regeneration (kg/h)
LF-15	12–20	720–2040	18	40
LF-30	20–32	1380–4020	36	70
LF-50	32–60	2280–6660	60	120
LF-80	60–95	3720–10740	96	200
LF-120	95–150	6120–17460	144	300
LF-200	150–230	9720–27900	240	500
LF-250	230–310	12060–34440	300	600

Mechanical and Fan Data
Model	Regeneration fan (kW)	Wheel speed (rph)	L × W × H (mm)	Weight (kg)
LF-15	0.37	10–23	1100 × 850 × 1430	220
LF-30	1.1	10–23	1300 × 1100 × 1880	260
LF-50	2.2	10–23	1500 × 1300 × 2130	350
LF-80	3	15–28	1600 × 1520 × 2390	420
LF-120	4	15–28	1800 × 1960 × 2750	550
LF-200	7.5	15–28	2200 × 2150 × 3130	700
LF-250	11	15–28	2400 × 2500 × 3530	900

Catalogue rating basis: process air 20°C and 60% RH; regeneration temperature 120–140°C. Electric and steam entries are alternative regeneration arrangements. Wheel speed is revolutions per hour (rph), as printed. Cabinet dimensions may vary with the project configuration.

WHERE IT WORKS

Applications

The catalogue identifies electronics production, precision-instrument rooms, museums, libraries, storage and process drying as applications. More demanding low-humidity production requires a model and complete treatment arrangement specifically selected for that duty.

Confirm process airflow, entering conditions, target humidity, regeneration utilities and exhaust routing. Very low dew-point duties require a dedicated selection and should not be assumed from the general product description.

Send Your Requirements →

Electronics and industrial production with defined humidity limits.
Museums, archives and material stores concerned with moisture exposure.
Food, film, wood and other process-drying applications.
Specialist dry-room systems designed around a specified humidity or dew point.

Illustration of pharmaceutical production equipment in a bright processing room — **Pharmaceutical Production** Humidity and air-treatment requirements coordinated with the process.

Illustration of an electronics workshop with rows of assembly benches — **Electronics Manufacturing** Air-treatment planning for controlled production conditions.

PROJECT INQUIRY

Discuss This Equipment

Tell us about your equipment requirements and installation conditions.

From cleaner air
to a better future.

Modular Desiccant Wheel Dehumidification Unit

Overview