Originally Posted by lllkrob
Electric heat is dryer than propane and will lower the humidity level quite a bit.
This is an old myth that does have some truth IF you are using an open flame heat source like an old Deerborn heater.
With a modern furnace, the combustion process is within the forced draft heat exchanger. The air blows across the other side of the heat exchanger and the result is no different than an electric resistance heater.
To reduce the moisture, you need to eliminate heat sources as much as possible. vent when cooking or showering, Leave a vent cracked open all day and night. Just your breathing and skin evaporation puts a lot of moisture in the air. Also use a squeegee to wipe the water from the shower walls and floors.