HVACs are not as simple units are many of us think. Any HVAC unit is a complicated piece of machinery that senses the temperature, moisture and other factors, and works to stabilize them. In the process, it grabs air from the outside, filters the air, heats it or cools it, and then pumps it into your home. As it completes this cycle, it is put under a lot of pressure by the environment including dirt, pollutants and temperature differences. Regular HVAC inspection is necessary to ensure your HVAC function properly all the time.