One of the most essential parts of heating and cooling systems is the air filter. The filter cleans the air when the heating and cooling takes place, providing the cleanest, healthiest air possible. It is usually the main source of issues when it comes to HVAC problems. The air filter of your HVAC is crucial to the efficiency and performance of the entire system. A clogged filter will lead to increased running costs down the road and a high chance of a premature failure of the system. However, with yearly maintenance, cleaning, and replacement, your system will run smoothly throughout the entire year.