A large city
hospital tested UV units to determine if
ultraviolet lamps would effectively control microbial growth
inside a large second floor air circulating system.
locations were both the down and upstream sides of the A/C cooling
coil system. Testing was performed using SAB DEX Contact Plates.
They first tested for unexposed surface fungi concentrations in
the coil region. At each location the fungi (mold) were identified
before UV exposure resumed.
on each side of the A/C coil was cleaned before tests started.
Other parts on both sides were left uncleaned. It was determined
that the locations had between 30 to 50 Culture Forming Units (CFU)
of fungi (mold).
short-wave ultraviolet lamps were then installed and tested for
results. Both clean and uncleaned surfaces were tested for fungi
to determine if the ultraviolet light would effectively eliminate