A7 AirTap install (ASHP hot water heater)

[Xringer]

Originally Posted by Daox

I don't know why you'd have humid air in your attic in winter. The outside air should be very dry. If you have humid air it must be coming from some other place.

Maybe I'm too near the Atlantic Ocean? (11.5 miles).

Plug in some winter months, and take a look at last year's Woburn's humidity column.
WOBURN WEATHER CENTER - WU Station History
The peak humidity on many winter days is pretty dang high.

It does cause a few problems with the Sanyo's frosting up..