The owner of a heating, ventilation, and air conditioning system can do a lot on their own to ensure that the unit is in working order. Changing the air filters is the first and easiest thing that the owner of an HVAC system can take care of all by themselves. Air filters should be changed every 2 to 3 months at the latest. This ensures that the air ducts are not clogged with dirt and debris and other foreign objects. If an air filter is left unreplaced with a new one for an extended period of time, dirt and debris will begin to build up in the system. This debris will eventually clog the inner workings of the HVAC unit and cause serious problems. That is why I cannot stress enough how important it is for the owner of the HVAC system to change out the old filter for a new one on a regular basis. Regular HVAC maintenance visit throughout the year are also important to upkeep the system. However, there will be far less problems for the HVAC technician to deal with if the customer is faithful to change their old air filters out regularly on their own. The HVAC vents will be cleaner. Furthermore, the various parts of the HVAC unit will last longer if air filters are faithfully changed. You will end up saving a whole lot of money by paying attention to the basic maintenance needs of your HVAC unit. These most basic needs certainly include changing out the old air filters for new ones in a timely fashion.