Career – Jobs Available About Us R. Williamson & Associates (WeSellFans.com) is a manufacturer’s representative firm providing Northern Illinois, Northwest Indiana and Southern Wisconsin with
AbsolutAire Distributor
AbsolutAire is America’s leading manufacturer for heated, cooled and ambient replacement air, make-up air and total air management systems since 1992. We are AbsolutAire offical distributors ready to answer any questions.
Offering both standard and custom solutions they will create the best solutions for your commercial, industrial & institutional needs.
The AbsolutAire mandate is the customers are number one. Always searching and listening for ways to provide better service, to innovate and provide solutions that exceed expectations.Â
Not only with make-up air units and air-handling equipment quality, but providing great service years after as well.Â
Click below to see all our air handlers & make-up air units from all the manufacturers we represent.

AbsolutAire Make-Up Air Units​
Direct Fired Make-up Air System
- V-Series
Custom Air Handling
- S-Series
Burner Boxes
- Construction - CH Series
- Door Heaters - DH Series
- APD-Series
Direct-Fired High Temp, Low Volume Space Heating
- H-Series
Direct Fired Heating and Ventilating
- AA-Series
Fan Boxes - Untempered Make-up Air
- FBDWH-Series
- FBAFH-Series
- M-Series
Cooling Options
- EVN-Series
- EVR-Series
- APD-Series
- CB-Series
Indirect-Fired Heat & Ventilating
- I-Series
Direct Fired Heating & Ventilating
- R-Series
Absolutaire Distributors
We are official AbsoluteAire distributors. As office representatives, we’ll be happy to help explain which make-up air unit is best for your application. Contact us for a quote or any information regarding their products.
About AbsoluteAire
R. Williamson & Associates is the official representative and distributor of AbsoluteAire equipment. We can help choose the right product such as advanced air handling unit systems.
AbsolutAire sticks to their promise of bringing the best customer service and surpassing expectations every time. Their goals include being of the highest value in regards to both production and service while staying green, cost-effective, and practical.
Our companies work together because we both see the value of high-quality products and team members. Years of experience make for years of change, constantly improving and designing products based solely on customer demands. One thing that hasn’t changed is the service and quality we provide.
R. Williamson & Associates goal is to continually supply and distribute their ventilation equipment with fast turn around time and great service.
From product selection to providing installation solutions, R. Williamson & Associates is here for your industrial ventilation needs.
Please take the time and learn more about us.
AbsolutAire Applications
Some applications of their products include:
- Heavy industrial
- Manufacturing
- Packaging
- Air Cleaning
- Warehouses / Distribution Centers
- Painting / Powder Coating
- Anodizing / Plating / Finishing
- Kitchens / Food Service / Restaurants
We’ll be happy to help explain which model and make is best for your application.
Providing Industrial Ventilation Equipment to the Following Industries
We’ll be happy to help explain which model and make is best for your application. Â
We ship nationwide
- Joliet
- Bloomington
- Rock Island
- Quincy
- Pittsfield
- Waukegan
- Rockford
- Champaign
- Genva
- Woodstock
- Wheaton
- Springfield
- Peoria
- Moline
- Aurora
- Kenosha, WI
- Darlington, WI
- Racine, WI
- Lancaster, WI
- Monroe, WI
- Crown Point, IN
- East Chicago, IN
- South Bend, IN
- Valparaiso, IN
- LaPorte, IN
Manufacturers We Represent
At R. Williamson & Associates, we pride ourselves on being the official distributor for leading industrial ventilation manufacturers. Our commitment to quality and efficiency ensures that our clients have access to the best products in the market, tailored to their specific industrial or commercial needs.
Why Choose Us?
Exclusive Access: As the official distributor, we provide exclusive access to products that cannot be ordered directly from the manufacturer. This ensures that our clients receive genuine and top-tier products backed by industry leading warranties.
Expert Assistance: Our team is dedicated to assisting you in finding the right product for your industrial or commercial application. We understand the complexities of ventilation needs, and we’re here to guide you through the process.
Streamlined Ordering Process: We facilitate the ordering process by acting as a liaison between the customer and the manufacturer. Our expertise ensures that the proper equipment is ordered the first time, saving you time and resources.
A Wide Range of Manufacturers: We represent a diverse list of manufacturers, each known for their excellence in the field of industrial ventilation. This allows us to offer a wide variety of solutions, catering to the unique requirements of each project.
Our service is more than just a distribution channel; it's a partnership that aims to solve your main pain points in obtaining the products you need.
By choosing R. Williamson & Associates, you are opting for a seamless, professional, and reliable experience in industrial ventilation procurement.