What's the LG AC damper all about & when to use it re: new LG AC window/wall mount unit is what this DIY howto video is about. It's amazing how many people don't really know what the LG AC damper knob is for & when to use it & when to not use it. Do you know what the LG AC damper is for, or for any other AC unit for that matter? The damper is used to bring fresh air into your home, condo, apartment, duplex, wherever. Pull the damper out & that allows fresh outside air to enter your room. Push the damper in & that will close off your LG AC unit from allowing outside air to enter your room. If your room is dank & musty smelling let's say, then pull the damper out & turn on your LG AC unit & let the outside air in to circulate into your room. Leave the damper pulled out for say half an hour (or more) then push the damper back in. If you leave the damper pulled out & forget to push the damper back in then in the summer let's say, you are allowing the hot are into your room thus dis-allowing your LG AC unit to properly cool your room since you are now trying to cool your room down while also allowing the hot air outside to come into your room at the same time. That would not make sense would it? Push the damper back in then. That's what the damper is for. Since VideoJoe is installing the new LG AC window/wall mount units in a vacation condo in Maui, do you think he should allow the vacationers to see the damper knob? Or should he push the damper knob & fold it back into the LG AC unit to be on the inside of the face frame cover? Right! He's going to push the damper in & leave it in & fold the damper knob back in so the vacationers don't see it. They will never need to pull or push or break the damper knob since the vacation condo will always be in use so no need to ever have the damper pulled out right? Knowing how to use a damper knob for an LG AC window/wall mount unit is easy...when you know how. Watch & learn as VideoJoeShows you what's the deal with an LG AC window/wall mount unit damper knob & when & why to use it...or not. Easy!