I have 2 registers in my old house that kick out the most air but unfortunately one is in a bathroom and the other in a space we rarely use. I have access to the duct for the one in the bathroom but the damper doesn't seem to do much. The other, I would have to cut open the ceiling in the basement to access the damper if it has one. I guess I'm just looking for the best way to inhibit air flow to these registers. Does this mean cutting out section of duct and installing a better damper, if so how do I do that. Or is there something I can do actually at the register? I have put registers with dampers in and they don't do much either. Regis are on walls not floor so those magnet deals don't work either.
I agree with Tazin, but the fact of the matter is that most dampers in homes today will stop maybe 80 percent of the air and that is if it is a good quality one. Are you sure the damper is turning when you move the lever..I have seen alot of them come loose from the lever and jhust stay in the same position.