I am still training for my first inspections.
Recently I was touring a new res. construction in my neighborhood
and noticed a 1/4" orange flexible pneumatic tube running around the perimeter of the main floor rooms, inside the wall cavity, about 12" off the floor.
I traced it out to the condensers, maybe heat pumps, outside, but it wasn’t connected to anything yet.
Can anyone tell me what this was? Is it an HVAC component?