Should biocides be sprayed into HVAC systems or occupied buildings?

The use of biocides in HVAC systems or occupied buildings raises significant concerns about exposure and safety for occupants. Biocides are chemical agents intended to kill microorganisms, and their application in areas where people spend time can lead to inhalation or skin contact risks. There are potential health effects associated with exposure to these chemicals, including respiratory irritation, allergic reactions, and other health issues.

Moreover, the application of biocides can also damage HVAC systems or other components if not handled properly. Occupational safety and health guidelines often advise against introducing these substances into environments where individuals are present. Instead, any remediation or disinfection efforts should be conducted under controlled conditions and with appropriate safety measures in place, ensuring that occupants are not exposed to harmful substances during the process.

While there may be certain conditions under which biocides could be used (such as emergency situations or specific system types), the overarching principle is prioritizing the health and safety of the building's occupants. Thus, unless under strict safety protocols and with proper ventilation, the general practice is to avoid spraying biocides in occupied areas or HVAC systems.