Bought a house built in 1969. The central heat/air unit is newer then that. No makers name, no data plate visible. It is downflow. On the front of the unit near the bottom it has two welded in 3/4 pipe couplings. It looks like a piece of tin was taped over them to cover them over. that fell off. Any thoughts on what they may be. The condensate drain pipe is right below them and drips into the crawlspace.
I do not think this unit is new enough to be a high efficiency condensing unit. It does have a small fan and motor that appears to be forced combustion air or something not the main blower fan and motor.
Bil lD.