ACS Filters & Service was founded in 1969 by Sam Viola. Today, our business and flagship location on Grand Ave still upholds the same mission: to serve Chicagoland engineers with the filters needed for quality ventilation.

ACS has had a reputation of heartfelt service, quality products, and low prices for 55 years. We have a large inventory of HVAC filters and belts meant to cater to your specific needs. ACS’ service department delivers quickly, and can schedule filter change-out services. Other services include free site surveys of cottonwood screens.

We are here to help you save money,  while also ensuring your HVAC ventilation filter and belt needs are taken care of efficiently. We will do anything to ensure satisfaction, and to be your preferred supplier.

You’ll be impressed with our large inventory of standard filters. Made-to-order custom filters are our specialty, and we have a large selection of HVAC belts. Our cottonwood screens are custom measured to your RTU/AHU/chillers/cooling towers, and our state-of-the-art HEPA-UV portable air cleaners can help fight illness (and COVID as recommended by ASHRAE to CDC).