Nice find!!
I count the vent pipes, protrusions, wall vents on the outside march into the home.
They are added to my checklist.
Then I turn each one on and inspect it outside to see if it is functioning.
Any missing branches are reported as suspect.
I can not complete a HI in under 3.5 to 4 hours for < 1100sqft.
seems the tighter a home is the more venting and HVAC or air circulating branches.
NORMAL?
For time.:roll: Not venting.:shock: