(efficiency 4.6 to 96 kg/h*)

BDHM…R adsorption dehumidifiers were designed to recover heat internally with the nominal dehumidification efficiency, and at the same time limit power consumption. Similar to all adsorption dehumidifiers, they are built basing on an adsorption rotor made of carbon soaked in silica gel. Thanks to this, maximal dehumidification effect can be achieved.

Models with efficiency up to 10 kg/h* are made of stainless steel. Bigger devices have bodies made of aluminium and insulated panels

Additional advantage of devices from this series is the option to adjust the device to recommendations and requirements of the customer by creating special versions (it is possible to equip the dehumidifier with new elements and modify parameters, i.e. amount of dry air, fan compressions etc.) Thanks to this, the dehumidifier extends its functions with additional filtration or regulation of air temperature.

Dehumidifiers have PZH certificates which allow to use them in food and pharmaceutical industries.



Dehumidifying capacity: 4.6– 95 kg/h* 
Dry air efficiency: 1000 – 14000 m3/h 

  • ..R dehumidifiers were designed for process dehumidification, they have bodies made of aluminium profiles and panels insulated with 50 mm mineral wool, and made of galvanised steel. It is possible to have panels made of stainless steel.
  • the regeneration heater is electric by default, it is possible to use gas, vapor or water heater. To measure regeneration temperature, electronic temperature regulation is used
  • ..R dehumidifiers allow to create them in a version optimal considering the requirements thanks to sectional structure Besides dehumidifying function, they can be equipped with initial and finish coolers, process heaters, heat recovery or additional filtration Everything is in one unit.
  • High quality and reliable components of known manufacturers were used for construction
  • uniquely efficient adsorption rotor with long life cycle
  • disposition pressure of process and regeneration fan chosen individually
  • dehumidifiers can work in the full humidity range (0-100%RH) and below zero temperatures (-25C to +40C)
Technical data:


Dry air**

[m 3 /h]

Humid air

[m 3 /h]

Power consumption


Dimensions [mm]
BDHM 46R 4.6 1000 250 6.4 680 450 1100
BDHM 50R 5.2 900 350 7.8 680 550 1200
BDHM 75R 7.5 1200 450 12 660 810 1370
BDHM 80L 7.3 1250 430 10.5 845 620 1080
BDHM 90L 10.0 1500 580 14.7 845 620 1080
BDHM 100R 10.0 1500 600 15.5 1560 910 1370
BDHM 125R 12.5 2000 500 19 1760 1030 1390
BDHM 150R 15.0 2600 900 24 1760 1030 1390
BDHM 200R 20.0 3500 1300 32 1950 1250 1590
BDHM 240R 24.0 4300 1500 40 2050 1350 1790
BDHM 300R 30.0 5000 1900 48 2150 1350 1790
BDHM 380R 38.0 6500 2300 48 2300 1480 1900
BDHM 420R 42.0 7500 2500 64 2500 1650 1950
BDHM 540R 54.0 9000 3000 80 2800 1650 1950
BDHM 660R 66.0 11000 4200 110 3400 1650 1950
BDHM 950R 95.0 14000 4700 127 3500 1650 2300

*for process air conditions t=+20⁰C, 60%RH

*for density 1.2 kg/m3

Principle of operation of dehumidifier BDHM..R

The core of the adsorption dehumidifier is a silica gel drying rotor. Dehumidifying is done in the process part, where microscopic water particles are adsorbed at the rotor surface. Dry air is let to the process by the process air. Regeneration air is used to regenerate the rotor, which vaporizes water from the rotor after appropriate heating. The humid air is removed out. BDHM…A dehumidifiers make use of rotor heat recovery to heat the initial regeneration air. This solution allows to save energy used to regeneration process.

  • mechanical humidity sensor to control the device
  • electronic humidity regulator to control the device
  • possibility to use additional filters, heater or air cooler
  • possibility to communicate with the device by Modbus protocol
do opisu adsorpcyjne osuszanie powietrza - BDHM_R DEHUMIDIFIERS


Adsorption dehumidification technology is the most efficient dehumidification method. It is characterized by high efficiency and durability. Adsorption, washable drying rotor is the most element of the device. It can work 10-12 years, depending on operation conditions. Humidity that is removed from the air is adsorbed at the rotor surface and it does not interfere with its structure, so the rotor maintains its drying features for a long time.

Adsorption dehumidifiers are distinguished from other solutions by the possibility to work within the full range of humidity (0 to 100% RH) and very wide temperature range, including temperatures below zero (-25C to +40C). Using adsorption dehumidifiers by LEWACO gives the option to achieve very low dew points (e.g. DP=-20C, DP=-25C for special versions).

Another advantage of adsorption dehumidifiers that is a result of their amazing durability is the possibility to achieve the effect of appropriate dehumidification with minimized amount of air necessary for this process. As a result, ventilation ducts and sizes are smaller.

Adsorption dehumidification basing on LEWACO devices can be used in all weather conditions, with all humidity levels, and guarantee efficient solution of the problem of humidity for long years.