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Weatherproof outdoor installation of desiccant dehumidifiers for drying indoor air through circulation


To avoid the formation of condensate and consequential problems the air in accommodations and storage facilities needs to be permanently dehumidified to a level below dew point.

Powerful desiccant dehumidifiers such as the high-quality Trotec devices TTR 400 D or TTR 500 D with separate internal air flow ducts are an ideal solution for these requirements.

In many cases an indoor installation of the devices is not permitted, undesirable due to the noise or impossible to realize for other reasons. Here the Drybox – especially developed for TTR 400 D and TTR 500 D – allows for the weatherproof outdoor installation of the dehumidifiers.

Via an air transport hose, the humid indoor air is sucked in, reliably dehumidified to below the interior dew point and then transported back into the room as dry air via a second connected hose in the recirculation air cycle.

With the Drybox desiccant dehumidifiers can also be used out of doors, so as to enable an undisturbed dry keeping of accommodations or storage facilities via air circulation.
The weatherproof Drybox comes equipped with suitable hose connections for TTR 400 D and TTR 500 D as well as with a lockable service flap for the configuration of the devices.
Optionally available for the connection to the dryer’s humid air outlet is a flue pipe with rain cap which prevents snow from drifting in as well as direct rainfall and can be screwed to the Drybox.

A few practical benefits:

  • Professional quality “made in Germany” – originally produced by Trotec
  • Especially developed for drying indoor air from outside by way of circulation using the Trotec desiccant dehumidifiers TTR 400 D and TTR 500 D
  • Weatherproof construction with lockable service flap
  • Additional soundproofing function

Trotec: Innovation made in Germany

Take a look behind the scenes: As one of the internationally leading manufacturers of air treatment solutions, Trotec offers industrial and commercial customers innovative products for air purification, dehumidification, heating, air conditioning and ventilation. We rely 100 % on research, development, design and production in Germany for our high-performance devices. For the highest quality requirements, sophisticated system solutions and fresh ideas.

Watch the video to see for yourself!


Technical data

Technical data
General information
  Article number
  Length (pallet excluded) [mm] 600
  Width (pallet excluded) [mm] 590
  Height (pallet excluded) [mm] 490
  (packaging excluded) [kg] 10
Equipment, features and functions
Housing design
  Metal sheet
  With protective paint CDC-coated

 standard equipment

 optionally available

 not available



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