ERV Air Intake Duct Freezing
I had an ERV installed in my home 2 years ago – zone 5. It works just fine with one complaint. The intake duct freezes in cold weather resulting in soggy insulation when temperatures return to normal.
At first, the installer used mostly R6 insulated flex duct. When that failed the first winter, they returned and piped the intake with rigid duct with an R8 insulation sleeve over it (picture attached). Unfortunately, there was frost where indicated in the photos, and the insulation is wet again.
Any recommendations on how I might redo the intake duct to avoid the frost buildup in colder weather?
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