Can you dehumidify a garage?

Wednesday, June 1, 2011 by Aprilaire Team
Consumer question:

I have a new 3 bay garage . It can become very humid. I believe that the tight construction allows humidity to build up and coat surfaces with moisture once the temperature changes.

The garage is 32 feet by 40 feet with ceiling heights from 11 feet to 14 feet.

A propane fired 95% efficiency heater is being installed with the return on the unit and a simple row of supply vents from one large duct running the width of the rear wall at the ceiling.

Will your unit 1750 dehumidify, both winter and summer,  this size garage?


Aprilaires' response:

Based on the dimensions you list, the garage is equivalent to a 2000 sq ft space. The 1750A dehumidifier can control up to 5000 sq ft. Other factors that must be taken into consideration are the tightness of the space, how quickly air infiltrates, and climate.
Primarily, our dehumidifiers are for summertime usage, taking 65° to 85°F air and lowering the humidity into the 45% to 55% range. Wintertime humidity can be much lower, but due to the outdoor conditions, still create condensation. For most wintertime humidity issues, we recommend a ventilation option. If your wintertime conditions are more like the summertime conditions described above, the dehumidifier can still have an impact lowering the humidity.
Please let us know if you have any further questions.

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