Why is there condensation on the return ducts and mold in the attic as well 60% humidity throughout the home?
This home has since been remodeled, including all new metal duct work and insulation. The issue that we need to resolve is the high humidity in the house at about 60-65% even though the unit is running efficiently. There is quite a bit of condensation on the return ducts in the attic as well. We have had two reputable Heating and Cooling Contractors come to assess the situation to no avail. The owner attempted to contact the original Mechanical contractor, but has not been able to speak to anyone yet. The owner is 9 months pregnant and afraid the mold will be extremely harmful to a newborn. I am now are reaching out to you for your assessment of what you believe the problem may be. Additional information that may be germane to your analysis includes:
· 1959 Ranch style home in Tallahassee, FL
· 1746 SF
· R19 insulation in the rafters
· R13 insulation in the walls
· Metal roof with styrofoam underneath R15-20
· Soffit vents
· Crawl space has 20 mil plastic sheathing
· 3/4” plywood on subfloor
· Walls are gypsum plaster board
· New double pane Anderson windows throughout
. Goodman 3.5 Ton Condenser and Coil/ Gas Furnace
Unfortunately, this issue is causing major delays in the project and we would like to get humidity levels under control as soon as possible.
Additionally Insulation was installed to the complete rafter. I have attached a photo as well.
Thanks again and look forward to speaking with someone regarding the matter soon.
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