FSI is a regional leader that locally maintains inventory for your HVAC filtration products, supplies all Industrial Products, and provides the highest quality filter change-out service at an affordable cost. We not only stock and supply filtration related products from the world's leading filter manufacturers for virtually any application, we also offer scheduled filter change-out service and condenser coil cleaning. Based in Chicago and family owned, FSI is committed to quality products, expert technical support, timely delivery, and personal dedication to our customers.FSI provides highest quality, affordable, Commercial and Industrial Air Filter Change-Out Services, in addition to Coil Cleaning. Our service team offers a variety of maintenance schedules to meet your needs, providing services for over 5,000 accounts in the Greater Chicago area. The boundaries of our service area extend from Chicago: North to Milwaukee/Madison, South to Champaign/Decatur, West to the Quad Cities, and East to South Bend. FSI's filter service on a regular cycle is an extension of the normal HVAC preventative maintenance program. (Note: FSI is not an HVAC maintenance contractor). During our Filter Change-Out Service, our service technicians perform a visual inspection of the HVAC system and report any problems or recommendations to ensure proper operations for your facility. Our service cycle can be tailored to meet customer needs and requirements from a weekly, monthly, quarterly, or yearly Filter Change-Out cycle.Pick up your HVAC filters and V-Belts today! Immediate filter availability. You will be in-and-out the door in less than 9 minutes!Type in "Filter Services"​ in Google Maps and press Start Navigation.