Propane furnace sending heat to outside vent
Hi, Running our Suburban propane furnace it seems like the unit is pushing as much (or more) heat out of it's exterior vent as it is to the interior vents. At the vents the flow is a gentle convect...
Forum Discussion
JaxDad wrote:Sam Spade wrote:
I've dealt with a LOT of gas furnaces over the years, both in permanent structures and house trailers and have NEVER seen one where the combustion air was not gravity fed.
Maybe I will learn something new today. :)
Gravity? I suspect you meant to say convection.
Either way, I'm not sure how well a foot tall mostly horizontal furnace would vent when the intake and exhaust are at basically the same height.
There kind of needs to be some appreciable height for the hot air to rise to create enough vacuum / air flow for cold air to be drawn in. If the 'intake' and 'exhaust' were at the same height the heat would just spread equally between them, assuming both ports were equal size.
There isn't a lot of height difference between the inlet and outlet on an RV water heater, but convection works quite well there. I do agree that the even smaller available space in an RV furnace would be a problem though, without the fan to insure exhaust circulation.
