HVAC maintenance should normally be conducted at least once a year. This monthly maintenance ensures that your HVAC system runs efficiently and lasts as long as possible. It is crucial to remember, however, that certain components may necessitate more frequent attention. Air filters, for example, should be examined and replaced on a regular basis, often every 1 to 3 months. Furthermore, if your system has any problems or is performing poorly, it is best to schedule maintenance sooner rather than waiting for the annual check-up. Consulting with an HVAC professional can give you with more precise advice depending on the requirements and usage of your system.