Unless you have contractors inspect your house from top to bottom, how are you supposed to know if you’ve got problem areas that you don’t already know about to begin with? I’m not a carpenter or an electrician, so I have to rely on professionals to help me with these sorts of things. My friend John is a plumber and knows professionals in every industry, so he never has to worry about issues at home as he knows who to call regardless of what happens. He has a friend who’s an electrician, another who is a roofer, and a third friend who works in the HVAC industry. I was eager to get the third friend’s number because I’ve been having issues with my HVAC system for years now. I thought at first that I purchased a system that was too small for my house, so I figured that John’s HVAC friend could find out for me with a quick inspection. To my surprise, John’s friend claimed that my air conditioner was in fact the proper size and model for my needs, but that there were major temperature discrepancies from room to room as a result of a poorly built mental ventilation system. I figured this meant that I needed new ductwork, but he said that dampers can be installed instead. They block too much air from going into rooms where there are paths of lower resistance. That way it pushes more of that cool air into the rooms that were previously getting deprived. You aim for equal temperatures throughout each room, but it’s hard to get it perfect when you have as many things wrong with your ductwork as I do with mine.