I can remember a time when central heating and air conditioning systems for your home were big and bold. But today this is not the case. Today when you buy a brand new and up to date central heating and air conditioning system unit they are actually pretty small in comparing. You can actually sort of lift the central heating and air conditioning system yourself. Before that would be impossible and you would need 2 big strong heating and air conditioning workers to move a central heating and cooling unit and even then they would need a dollie to put the HVAC unit on! Today they can just lift and carry the central heating and air conditioning system. That is how much things have changed in the last 20 years or so with heating and air conditioning technology. They actually were able to build a much lighter weight and less big and bulky central heating and air conditioning system unit. This is really amazing if you ask me. I never thought I would see the day where a central heating and air conditioning system was this light in weight compared to the old central heating and air conditioning system units. It makes me wonder if they will get even more compact and even lighter in weight as heating and air conditioning technology continues to advance from now into the next century! It really makes me interested to wonder and keep following the onset of brand new heating and air conditioning technology.