On 3/25/2015 10:56 AM, trader_4 wrote:


How do they heat it up and dry it out? Forced air moves the air past
an air to air heat exchanger. The same amount of water that was in the
air coming in is also in the air going out, it's just warmer. With
hot water baseboard heat, you have a water to air heat exchanger.
Air moves moves past the heat exchanger via convection. Whatever water
is in the air coming to the radiator is still in the air leaving the
radiator. In neither case is any moisture added or removed.


In my old house it was very dry from the hot air heat. There was a
fairly large flame that used heated air to burn and then it went up the
flue. Of course, it relied on make up air infiltration for makeup from
combustion, thus it brought in a lot of dry air. That heater was made in
1949. I have no idea how it compares to more modern units in