Have you changed your home’s HVAC air filter lately? The air filter will typically be the first thing that an HVAC technician checks when they come to your home for a tuneup or repair. A dirty air filter is one of the most common reasons for an HVAC system to perform poorly, and many people forget to check them. For maximum performance, the air filter needs to be changed every one to two months, and more often if you have pets or someone in the household with allergies. Before you