As I noted, I did this in cold New England and it made a noticeable
comfort and fuel economy difference. It made no detectable difference in
condensation or mold. I rarely had any condensation except for the
kitchen and bathroom after high moisture activities and that quickly
dissipated. I also use bleach containing cleaners which inhibit mold
growth anyway.


There's a good reason for this, too. THe air that would
normally be carrying heat to the windows is the same air
that would be carrying water to them.