When you are shopping for a brand new and up to date central heating and air conditioning system, there are many things for you to look at before you even think about purchasing anything. The first is what brand and model heat and a/c unit would be a good fit for your home. This is something that is based on the size and shape of the house you live in. Then, the next thing you are going to want to look at is the SEER rating of the central heating and air conditioning system unit. SEER rating is very important because the SEER rating will tell you exactly how energy efficient the central heat and a/c system is. If it has a low SEER rating you are going to want to avoid buying that particular brand of HVAC system because you will have very high electric bills as a result. With a great SEER rating you will have average bills that will be much more affordable in the bad weather times of the year depending on where you live. Also, the one important thing I look for when buying a brand new central heating and air conditioning system is if it has some kind of a 1 year warranty. This is important as central heat and a/c units can sometimes break down within a few months of buying them if there is a manufacturing defect from the factory. It doesn’t mean that it’s a bad machine or anything like that. It can be that there was just a small flaw in the production line.