The Johnstone Supply store of Fort Walton Beach, Florida is proud to announce the recent addition of David Benzenhafer and Dennis Parnell to their inside sales team. David and Dennis will be Counter Associates and Inside Sales Team members serving the needs of the local HVAC contractors. David Benzenhafer David brings over 25 years of HVAC service experience to his duties at Johnstone. He has been in sales, service and service management during his career. Read More