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We installed a honeywell DH90 whole house dehumidifer #B08167014 4026552. Unit is removing water but the supply side is warm air. We are wondering if this is normal or if this air should be cold.

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  • bhiscott Oct 03, 2008

    I have the same problem. While the DH90 does a great job at removing the humidity, it is increasing the interior temperature by 5+ degrees. 


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I assume you mean the exhaust side of the dehumidifier, which goes into the supply duct of the furnace.

All dehumidifiers, whether small portable types, or whole house types, exhaust warm air (which is also dry air) as they remove humidity. The whole house unit which you have is a great solution to humidity control. Since the furnace fan should be running on a call for dehumidification, the mixing of the air in the building which is circulating and the exhaust (Dry) air from the dehumidifier negates, or dissipitates the heat in the air coming from the dehumidifier.

Posted on Aug 27, 2008

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I hope this leads you to the problem. Good Luck!

If this information was useful, please select YES to the first two rating questions. Good Luck and thank you!

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