Agree About Not Closing Vents

https://zionjuzi059.keystonescope.com/posts/ac-repair-for-heritage-homes-by-comfort-experts-in-north-fort-worth

Agree About Not Closing Vents Agree with the point about not closing too many vents. I used to shut them in the guest rooms to cut energy use, and the system started whistling and running longer. Opened them back up and things calmed down