Rburt5
Member
I had several ducts closed off that led to unused rooms in my house because I was trying to increase the air flow to other vents. Then my AC went out and the guy who fixed it noticed all the vents that were closed. He told me point blank that I am ruining my AC unit by closing off the vents, and that I should only turn the flapper a little bit if needed. But he made it sound like even that shouldn't really be done. Is he right? I've always thought that closing off the vents to unused rooms can save on energy costs.