How is Legionella contracted from spas/hot tubs and what actions ensure that this never happens? We deal in portable spas and there has been an article in the national paper recently stating that a person has died through infection from a spa.
Problems occur when biocides are not used or they are used at ineffective concentrations. The American Society of Heating, Refrigeration Air-conditioning Engineers (ASHRAE) has a section on spas and hot tubs in their publication “Minimizing the Risk of Legionellosis in Building Water Systems”. You can get a copy from ASHRAE or from the Baltimore Aircoil web site www.baltimoreaircoil.com.