
Roof installation vibrating in house
Hello all, we had a heat pump installed on the roof of a house that is rented out. The tenants now say it is extremely loud ("like an 18 wheeler idling" is how they describe it.) The installer looked again and said it's installed correctly. I'm wondering if anyone here has any advice for adjustments that could be made to improve the loud vibrations inside the house?
It's a row house so there really aren't a lot of other locations, I'm really hoping we can make the roof work.
Thank you!
Description for rules: 3000 Sq ft. row house in DC, thick brick walls.