HVAC UV devices

What is your opinion of the use and effectiveness of UV devices in the HVAC system?


A little light reading

If done correctly and placed correctly in front of the cooling coil or evaporator coil it can be very effective at keeping bacteria and viruses at bay.

Thanks Kevin.

Found this EPA link also: http://www.epa.gov/iaq/pubs/residair.html#Ultraviolet-Germicidal-Irradiation-Cleaners

Thing I find is the EPA has stuff for the public and is easier to understand. When you get into NIOSH you get into the meat and potatoes.
One of the things people get confused with is the difference between UV, Ionization and of course our favorite Ozone.