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  • damp insulation in HRV air intake duct

    I looked at an air exchanger today. The insulation on the air intake from outside (flex duct) was filled with water. No water inside the duct itself, just wet between the 2 layers of vapor barrier. Took the hood off outside and re-sealed, although I'm not sure if this will help in the long run.
    Anyone know what could have caused this?