Shannon, born Dec. 6, 1945, entered the HVAC industry as a service technician with TAB Services in 1966, founded Research Air Flo in 1977, and became a National Environmental Balancing Bureau (NEBB) certified supervisor in 1989. He served on the NEBB board of directors 1991-2011, occupying the roles of president, secretary, and treasurer, as well as a member of the technical committee.

Shannon is survived by his wife of 43 years, Mary Ann; his son, Joel Shannon (Lynn); daughter, Judy Stein (Britt); four grandchildren, Abbie Stein, John Shannon, Elizabeth Shannon, and Will Stein; in-laws, L.H. and Ann Tribble; sister, Susan Pethel (Paige); and brothers, Chris Shannon (Ann) and David Shannon. Contributions may be sent to Clear Springs Baptist Church, 11575 Jones Bridge Road, Alpharetta, GA 30022. Online condolences may be expressed at www.crowellbrothers.com.