Ideal Summer humidity levels vary from house to house

Consumer question:

I have an Aprilaire system and I have a question regarding the
ideal % setting for Summer temperatures.
I live in Cleveland, Ohio, and our Summers are very humid. They can
reach 80-90%, and lately, our temperatures outside have been any where
from 85-96 degrees Fahrenheit.

It seems like reducing the humidity would be the best thing to do,
correct?  If so, how can I turn the system off, and is that what you
recommend doing?

Aprilaires’ response:

Thank you for contacting us.  Ideal Summer humidity levels vary from house to house and application to application.  The Aprilaire Humidifier will not be operating in the summer.  In order for our units to operate, the relative indoor humidity must be below 45%, the heat must be running on your HVAC system and the outdoor temperature must be below 60 degrees if operating in the automatic mode.
To turn the humidifier off, we would recommend looking in your owner’s manual under the "Annual Shutdown" section for step by step instructions.  To shut the unit down for the season, you would turn the control to the off or 0% setting and turn the water supply off at the saddle valve.

2 thoughts on “Ideal Summer humidity levels vary from house to house

  1. Isaac Arco

    I have a large house and the humidity sensors are lower than 45%. I am getting lots of build up in the filters and I have changed a couple of them 2 times since Christmas! There has been a decent amount of construction in a couple rooms, but I dont think that is why the filters are so dirty. Do I shut off the humidity sensors, or is there another problem?

    1. aprilaireadmin


      From what you describe your air filters are doing their job by removing the solids from your air system. If the humidity level is below 45% you are under the level that can support dust mites and mold growth . The humidity sensors have no connection with the foreign particles in your air. If you want to be safe have your HVAC service technician out to service and evaluate your system.

      If you have any other questions, do not hesitate to contact us.


      Technical Support
      Aprilaire – Division of Research Products Corporation
      Call Center hours are M-F, 7:00 a.m. to 5:00 p.m. CDT


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