Although some of us live in unquestionably messy houses, I believe my friend and I can agree that my friend and I would all like to live in a apartment that is clean. I mean I would cherish to live in a apartment where someone cleans for me all of the time. The only way my friend and I can have this particularly is by having an Heating & Air Conditioning system. The Heating & Air Conditioning system put air into our apartment at whatever temperature my friend and I would like. The best part is that it is not putting dirty or contaminated air into our homes. The air is fairly wash as much as it can be. The system cleans the air with something called an air filter. This air filter is what traps all of the dirt & junk that tried to come into your home. There are strange filters you can buy. Every filter comes with a MERV rating. This rating is the minimum efficiency reporting value. It depends on the thickness that you would like your filter to have. In hospitals where the air is usually pretty sterile has a unquestionably high MERV rating. You will not find these thick filters in homes like that. The thicker the filter, the more stuff it can catch before it goes into your home. This is what helps to keep the air in your apartment wash as possible. Of course there can be other things such as bacteria, germs & pollutants that can enter your apartment that do not get caught in the filter. The can be taken care of with an media air cleaner. The media air cleaner gets rid of all of the things that the filter cannot catch. It makes for a wash & comfortable home.