Wanted, garage heat!

[Speedfreak]

Turns out the points in my pictures above are sediment traps. Between the instructions for the heater and more searching online, there are pictures I found showing right and wrong furnace installations. The sediment trap is the right way to install a furnace.

That being said, wondering if I can still use that point by just adding another "T" and just having the sediment trap lower than it is now?