Dehumidifying capacity: 4.6– 95 kg/h* 
Dry air efficiency: 1200 – 12000 m3/h 

BDHM…E adsorption air dehumidifiers allow to achieve the same dehumidification efficiency with thrice as low electric power consumption in comparison to standard dehumidifiers thanks to their inner heat pump. Additionally, they do not increase dry air temperature. 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.

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.

  • total power consumption 3 times lower than a standard adsorption dehumidifier and twice lower than a condensation dehumidifier
  • low temperature of dry air – no need to cool down the air behind the dehumidifier
  • possibility to achieve low dew points, up to DP = -10°C
  • insulated panels 50 mm width, built in aluminium profiles
  • heat pump compressor with continuous cooling efficiency regulation ensures high economy of operation
  • possibility to design a configuration perfect for the customer, electric switchboard with control system by default
  • 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 (+10C to +40C)
Technical data:


Dry air**


Humid air


Power consumption [kW]
BDHM 75E 7.5 1200 600 – 2 400 5
BDHM 100E 10.0 1400 800 – 2 600 6
BDHM 140E 14.0 2000 1000 – 3 600 7
BDHM 165E 16.5 2600 1200 – 4 200 8.5
BDHM 200E 20.0 3100 1800 – 5 200 11
BDHM 240E 24.0 3600 1600 – 5 500 12
BDHM 300E 30.0 4000 1800 – 6 200 13
BDHM 350E 35.0 5000 1900 – 6 800 18.5
BDHM 440E 44.0 6400 3000 – 12 800 23
BDHM 520E 52.0 7600 3800 – 15 200 25
BDHM 650E 65.0 9000 4600 – 16 600 27.5
BDHM 780E 78.0 10500 5200 – 21 000 31
BDHM 930E 93.0 12000 11000 – 40 000 38

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

**for density 1.2 kg/m3

Principle of operation of dehumidifier BDHM..E

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. In the place of standard regeneration system, an inner, high-efficiency freon heat pump is used.

  • 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


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.

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.