[throw0101a]

> You’re describing my situation. How do you de-leakify a house?

Do a blower door test and see where the air is coming in/out:

* https://www.energy.gov/energysaver/blower-door-tests

* https://www.youtube.com/watch?v=msZ_E-4GFs8

* https://www.youtube.com/watch?v=Q5vHxgq7GKo

Then plug the holes.