|
Not drafty at all, they don't move that much air to cause a draft. Now, all this depends on how warm, or how cool the air is.
I used mine this morning, just to move the warm air from the solar gain from the hot Arizona sun.
Look at the furnace as an envelope, the air around the closed envelope is what comes into the trailer from the inside of the trailer living space. The air entering the outside air intake moves through the inside of the envelope and back out.
In paint booth's and in commercial kitchens, they use a 100% outside air heater, but they really use a bunch of gas.
I imagine in extreme cold, it would not work, but would help.
That is where the temperature monitoring of the underbelly comes into play.
|