At Arctic Sun Heating & Cooling, we see a lot of HVAC problems that stem from poor air filter maintenance. The simple act of changing your filter can save you from countless headaches, so you should never overlook this critical detail. The frequency of air filter changes depends on various factors. You have to consider how many people are in the home, nearby construction areas, and any pets living in the home. As a general rule, we recommend replacing 1-inch disposable filters monthly. For 90-day filters, we suggest changing them every two months, as they often don't last the full 90 days. If you're in need of HVAC services, contact our team to get started!