Dee Cramer is a full service HVAC/Sheet Metal Construction & Service firm located in Holly, Michigan. Our capabilities include engineering, CAD coordination and design, 4D CAD and BIM, automated HVAC sheet metal fabrication, field installation and maintenance/emergency service for clients. Dee Cramer is one of the industry's most trusted names in HVAC/Sheet Metal. Currently in its 3rd generation of family operation, Dee Cramer has been committed to excellence since 1937. Excellence in Design, Workmanship, Competitive Pricing and Customer Service and Satisfaction.