The HVAC duct system is receiving an upgrade. The duct is really old and dirty, which is not enough to replace it, but it will also be too low in the room. The new and improved version will be 7-1/2" tall x 22" wide square duct. This duct will be exposed in the room The elbows you see are coming out of the top between the joists. All the rest of the pipe will be hidden in the joists and you will only see the grills in the appropriate places. Soon I will be ordering and picking up the new return duct for installation.
The existing furnace is nearly new and is a 90+, or a 90% efficient model. It will be more than adequate to supply the basement and the first living floor. This should be complete in the next week or so.