This is an insulation casing for the air conditioner line feeding the air handler. It is important that this line going to the air handler stays cold. The only way to do that is proper insulation. Take a minute and go outside and check the condition of your insulation. Does it look like my before shot? If it does, follow these simple instructions to change the bad insulation with high-quality insulation. This simple task will make your AC unit work more efficiently. This is not an expensive thing to do, but it will in fact save you money in the long run having an efficient AC unit keeps your house cooler and lowers your electric bill so why not try this and save some money. Our dog Coco really likes to stay inside during the dog days of summer. Get it? Dad humor at its best! Be sure to like and subscribe and watch more of my videos. I have them broken down into categories also known as playlists. Pick a playlist and get some knowledge because Ron Knows stuff, Mrs. Ron Knows stuff, and now you know stuff too. Bye for now!