The finished portion of my basement was completed after the original construction. I've found a few questionable practices, including the lack of an HVAC vent in the basement bathroom (shown in green below). I don't know the first thing about the air portion of HVAC systems, but I'm assuming a good design would have incorporated one. Do I need to install a vent?
Furthermore, do I need to add more vents/ducts to the main finished area of the basement (shown in red below)? The red dots below are where the current vents are installed in the room.
The current system that serves this portion of the house also serves another ~1,350 sq ft on the main level. There is an air return on both levels. The unit is a 3 Ton / 90,000 BTU split gas.
I am about to remove all the exterior-wall drywall to insulate (they kindly left all exterior walls uninsulated, even those above grade), and ceiling drywall to run various wires and cables. This would be an excellent time to run additional HVAC ducts if needed.
The lack of insulation really throws out the "does it feel comfortable as is?" test.
- "Den" => ~402 sq ft
- "Bath" => ~60 sq ft (modified for discrepancies in floor plan below)