Agree About Not Closing Vents

https://blogfreely.net/yenianhejf/h1-b-thermostat-checks-to-try-before-calling-comfort-experts-for-ac-repair-in

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