When installing a High Efficiency furnace horizontally, is it better to have our installer put it on blocks or suspend it from the ceiling (old furnace is suspended from the ceiling).
Furnace has to be mounted horizontally because it is in a ~4' crawl space. What are the advantages/disadvantages to either?
Is there anything else special with the horizontal installation that I should make sure the installer does?
Unit is the TempStar IIS90, 100k BTU, horizontal mount AC coil, HEPA air filter, UV light and will be connected to a 3.5 ton AC unit in the summer.