Our home was recently completed and when the cold weather set in I started noticing condensation on the windows. During warmer weather the RH in the home usually hovered around 55%. During the recent cold weather the RH was around 50%.
I recently installed a Honeywell DH150 to control the humidity level and hopefully eliminate the condensation issue. The DH150 is being controlled by a HW Vision Pro IAQ. The IAQ won't go below 40%. The RH is now always between 38-40%. The condensation has been reduced but it is still present when the outside temperature is <30 or so. It's enough to form beads of water on the lower portion of the windows.
We have Anderson 400 series low e glass window with wood interior frames. I'm worried that the condensation is going to cause the window frames to rot.
Our home is in St. Louis, MO. The area being serviced by the DH 150 is approximately 3500 square feet. Foam insulation was used for the entire structure.
I've been using our ceiling fans to try to circulate the air near the windows but no noticeable change occurred.
Is my RH still to high? Do I need to get a controller that will allow me to set the DH below 40%?
We also have wood floors throughout the house so how low can the RH be without negatively effecting the woodwork?
I'm at a loss.
Any thoughts are appreciated.