In the beginning

Chicago detective, Iver Johnson decided to start a window company focusing on serving local Chicago families with quality products. After working all day he would do business in the basement surrounded by his wife and 4 children.



Sahara Window and Doors

In 2009 Iver was approached about purchasing Sahara Window and Door, another locally owned and operated company based out of Mount Prospect. Shortly after Sahara Window and Door became part of American Thermal Window.




Currently American Thermal window is operated out of two show rooms, one in Chicago and one in Niles. Iver has been joined by two of his children, Iver Jr (left) and Andrea (right) who have been helping grow the business into the ATW you know and love today.