If the air intake for your air conditioner has a few places that are open to the space between the first floor ceiling and the 2nd floor should you close this off or is it okay to leave it open?

Hi,

It is not ok to leave them open to suck in unflitered air and upset the air balance of your system. It is not something that has to be fixed immediately, but it needs to be fixed. It is an important task to be accomplished but not urgent. Do not repair with Duct Tape! Duct tape is not for air ducts. Use the correct material and masticks for the repair. If not certain what to use ask at your local hardware supply store. Check and replace filters at the airhandler because they are probably filthy dirty. Check and replace as needed air return filters while you are at it!

Barry