Founded in 1952, Wojan Window & Door Corp. manufactures custom commercial aluminum windows, sliding glass doors, and terrace ... doors from facilities in Charlevoix and Coldwater, Michigan. The diverse product line is rated for a variety of commercial and architectural applications. Wojan is an approved supplier for Hilton® Worldwide and the Marriott® CFRST brands, a member of FGIA (Fenestration & Glazing Industry Alliance) and NAMI (National Accreditation and Management Institute), and a registered provider with AIA/CES (American Institute of Architects Continuing Education System). read more