There are a lot of things that are important to keep up with in life. Because they are so hard to replace, it would be too expensive to simply buy another. Airliners know this all too well. Because they know how to give their planes proper service, they don’t have to replace their planes hardly ever. Considering the consequences of a plane malfunctioning, it’s certainly comforting knowing that machines can actually work very reliably if they are only properly maintained. When it comes to your HVAC equipment, you can have a lot of control if your machine is able to operate at a high level for a long time. There are many aspects to consider however. The most basic thing you can do is replace your air filters when they should be changed. The standard rate, for changing an air filter in a typical suburban home, is once every 90 days. However, the rate for changing one’s air filter can change depending on certain factors. For one, if one’s home is used as a vacation home, they can get away with changing it as little as once a year. On the other side of things, if one has a pet it is recommended to change one’s air filter once every 60 days. Furthermore, if one has several pets they should change their air filter even more often, and they should do so in about every thirty days. Following these guidelines in HVAC maintenance is a great way to begin ensuring your heating and cooling system will operate efficiently and reliably for many years to come.