a month ago
ATW made it easy! Awesome customer service. Very knowledgeable and professional. Everything went without a hitch. Absolutely love our new windows and would highly recommend this company to anyone looking for windows or more! Thanks for all the hard work.
- Mic G
a month ago
Had all of our windows replaced last week. A great team of guys! Very respectful. Iver did our consultation and got us exactly what we wanted. Job was even completed ahead of schedule! Exceeded our expectations - highly recommend!
- Jim M
2 months ago
Very attentive and sharp looking wimdows
- Rebekah H

About us

American Thermal Window Products, Inc. is a family-owned and family-run business. Established in 1981, we began as a part-time operation by Iver Johnson Sr., a retired police officer of 31 years with the Chicago Police Department. 

With our showroom conveniently located at the intersection of Milwaukee and Central Ave. in the heart of the northwest side, American Thermal has served the entire Chicagoland area since its beginnings. This location offers displays of many different types of windows and doors, which include bay windows, bow windows, double hung windows, casements, garden windows, storm doors, replacement doors, etc. We also offer many services, which include full window and door installation and replacement, vinyl siding, gutters, soffits, and fascias as well as glass block windows. 

At American Thermal, we believe in giving each of our customers the personal attention he or she deserves. As a member of the Professional Remodelers Association, we strive to give you “top-notch” service with our own experienced carpenters and also the highest quality products from nationally recognized companies such as: Pella; Marvin Windows & Doors; SilverLine Windows & Doors, an Andersen Company; Great Lakes Window; Albany Door Systems; Larson Manufacturing; James Hardie; and Alside. We are also proud members of the Better Business Bureau.

Contact Us


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  • (773) 774-3131


Get directions
5304 N Milwaukee Ave, Chicago, Il 60630
Chicago, IL 60630
United States

Business Hours

Mon:8:00 AM – 5:00 PM
Tue:8:00 AM – 5:00 PM
Wed:8:00 AM – 5:00 PM
Thu:8:00 AM – 5:00 PM
Fri:8:00 AM – 5:00 PM
Sat:9:00 AM – 4:00 PM
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