I'm in the Canadian prairies...cold and dry in winter. I'm looking at
getting a whole house humidifier (using a big console one currently,
getting tired of cleaning the basin). I've got a two-stage gas furnace
with a variable speed blower. (Armstrong 95V, if it matters.)
I've read a few opinions online that it's better not to use a bypass
humidifier with variable speed blowers due to it confusing the CFM
sensor in the furnace, and that a powered fan style should be used
instead. Is there any basis to this?
Also...the temperature-based humidity control seem to turn the humidity
way down with low temperatures. At -20F they're dropping the humidity
down to 15%. That's crazy...you may as well not have a humidifier.
Health Canada recommends 30% humidity at low temperatures. Also, with
high quality windows and well insulated walls condensation is less of an
issue. Are there any temperature compensated humidistats that let you
set the minimum to more reasonable values?