I've read up on the posts regardin goodman furnaces in general. OK its
a contractor grade
unit, and not top-of-the-line stuff. That being said...

My buddy is renting a house (Northeast-Us) and he just cruised thru
what I consider
way too much fuel in one week. Appx 60 gals.

I went over and looked at the situation. The furnace filter was
missing, and was sucking
air thru the open housing. I duct taped that shut pending a filter
tomorrow.

It seemed to me that the "hot air" coming out of the duct 4' from the
furnace wasn't
all that hot. What is the output air temp supposed to be on this or
similar units?

The home itself isn't very drafty-leaky, so I'm looking at furnace
performance. 10 gals of
LP/day is alot for a 1000' s/f home with the 'stat set at 65.

Any Advice?