Is it Possible That your HVAC System is Contaminated?

HVAC systems provide a favorable growing environment for fungal spores and certain bacteria in and around cooling coils

HVAC systems provide a favorable growing environment for fungal spores and certain bacteria in and around cooling coils (Levetin et al. 2001) Coil fouling is caused by the growth of these microbial deposits, which increases coil pressure drop and reduces airflow and heat exchange efficiency (Montgomery and Baker 2006) The quality, quantity, and pressurization capability of air delivered to conditioned areas declines as performance degrades (Kowalski 2006/2009).

Because high-efficiency filters must be installed downstream of the cooling coil, they can become moist and wet as a result of the saturated air.

As a result, air filters are thought to be a breeding ground for fungal spores and bacteria, as well as a reservoir for infectious diseases.

According to ASHRAE, UV-C lighting should be put downstream of the cooling coil; therefore, if a UV-C system is installed there, it will disinfect both the coil and the filter, killing all germs in and on both devices. It should also be mentioned that when a light is used in a "common" coil-irradiation system, infectious illnesses in the airstream are killed as well.

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