Want a fast and easy way to slash your facility and HVAC costs? Fischer Robertson Inc. can help!! Air intake filters are so popular and necessary to help reduces HVAC costs. They provide many benefits including keeping your HVAC coils clean and, as reported by Process Cooling magazine, the average annual cost of running a system with dirty coils for a 100-ton HVAC system is an astonishing $22,500. Here are four ways air intake filters, also commonly referred to as filter screens and cottonwood screens, can substantially lower your facility costs.