Chemical

Chemical Sanitizers and Biocides  The use of chemical sanitizers or biocides may be necessary to clean certain HVAC system components such as heating or cooling coils. Following the use of chemical cleaners, all residues should be completely rinsed from the coil surfaces and removed from the HVAC system. Chapter 3, HVAC Operation and Maintenance, discusses the importance of routine sanitizing and use of biocides in cooling towers to reduce the number of microorganisms including Legionella spp.