The 3 things I learned when I had my foundation repaired that shocked me: slab movement can pinch ducts
https://www.livebinders.com/b/3708033?tabid=7a025273-e5e1-08ee-3b52-6aeb894f54d6
The 3 things I learned when I had my foundation repaired that shocked me: slab movement can pinch ducts, HVAC balancing after lift is smart, and filter dust loads spike.