When to remove 2nd/3rd dehumidifiers from larger residential jobs

[Noidios]

Small timer here - I am a carpet cleaner, but had enough requests that I went to drying school 15 years ago. Got my first multi-dehu loss in a long time and for the life of me, I can't remember how to determine when I can go from 3 dehus down to 2 and finally one. What am I forgetting?

 

[Kenny Hayes]

Your moisture meters

 

[Cleanworks]

Small timer here - I am a carpet cleaner, but had enough requests that I went to drying school 15 years ago. Got my first multi-dehu loss in a long time and for the life of me, I can't remember how to determine when I can go from 3 dehus down to 2 and finally one. What am I forgetting?

You leave all 3 going until it's dry.

 

[Kenny Hayes]

That's what I said, and I'm a janitor.

 

[kmdineen]

Dehumidifiers should be removed when you can no longer justify having them on a job. Check the Specific Humidity (grains of weight of water vapor in one pound of air) of the air going into your dehumidifier compared to the Specific Humidity of the air coming out of your dehumidifier. That difference is called grain depression. When the grain depression is close, your dehumidifier is not removing much moisture from the air and should be removed. Also check the Specific Humidity of the unaffected areas of the job, I would expect the Specific Humidity will be lower in your drying chamber.


As others have said use your moisture meters to insure you are putting moisture in the air, wet materials are drying and there is no trapped moisture in any affected materials.