Dessicant Dehumidifiers

Your Disaster Recovery Solution


ATI will customize a drying strategy and equipment plan to tackle each water damage situation. Our capabilities includes the latest in desiccant dehumidification, which is not limited by low dew point temperature – and is the only dehumidification technology that will efficiently work in conditions below 60 degrees Fahrenheit.


Why Desiccants?

Desiccants strive where other units in the industry cannot properly operate – at cold temperatures and in low humidity situations. They bring the specific humidity inside an affected structure down extremely low, to 10-155 grains per pound. We use desiccant dehumidification to tackle specialty drying situations, particularly those involving difficult-to-dry structural materials. Desiccant dehumidifiers:

  • Produce the driest air
  • Can dry your facility, regardless of how cold it is outside or inside the building 
  • Are thermodynamically efficient 
  • Reduce the total number of equipment pieces we must place on site
  • Are typically more effective in drying dense materials such as plaster, lathe and plaster, and hardwood flooring



How Desiccants Work

Desiccant dehumidifiers depend upon a dry attraction to remove water from the air, versus using condensation to remove it (as refrigerant dehumidifiers do). Desiccants produce the lowest vapor pressure of any dehumidifier on the market today. The cooler and drier the air going into the desiccant, the drier the air will be when it goes out of the unit.

Desiccant dehumidifiers process moist air across an absorbing material, such as a silica gel, and use extremely high temperatures to reactivate or bake the moisture – then exhaust the reactivated air. When using a desiccant, we install ducting from the unit to channel this air outside the building.



There are four main components of a desiccant dehumidifier:

  • Desiccant wheel – holds a grid of small air passages impregnated with silica gel and rotates slowly as it works to remove moisture
  • Blower – moves the air through the desiccant wheel (75% exits the unit as warm/processed air while 25% is used to remove moisture from the wheel – exiting the unit as warm wet reactivated air)
  • Heater – boosts the temperature of the reactivation air so that it can add energy to the water molecules on the wheel, driving out moisture
  • Outlets and inlets – control the unit’s airstreams (reactivation outlet, process outlet and process inlet)