The 3 things I learned when I had my foundation repaired that shocked me: slab movement can pinch ducts
https://lukasfkeg695.quantlynix.com/posts/residential-foundation-repair-3-things-to-confirm-before-calling-any-company-4
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.