[drewskiren]

Here is my custom plenum piece for connecting my new air unit to my old AC vents. The bottom is open to the new unit. I ended up eliminating the middle vent double sided hose connector and just attached my plenum box directly to it. The outer vents connect by old hoses into each side of my new plenum. Since the plenum is metal it would want to sweat/condensate and drip onto the carpet so I insulated it here with stick on foam insulation.