Is it ok to run the unit all the time or is it better to cycle with the fan?
The Air Knight unit treats your home when the HVAC unit fan is on. It is recommended to leave your fan on continuously when possible to provide maximum benefit. However cycling the unit on and off with the fan is acceptable but be aware that excessive repeated cycling may degrade the useful life of the lamp elements. Can the unit be installed on the return side of the HVAC?
The best location for your Air Knight unit is in the plenum, just after the air handler. This allows for full distribution and extended air treatment. In situations where it is some how impossible to locate the Air Knight unit after the HVAC unit it is acceptable to locate the Air Knight before the HVAC unit. However the high moisture content of the cooling coils as well as the high temperature of the heating coils will reduce the effective treatment capacity of the unit. Is it normal to have a fogged appearance in the lamp itself and the surrounding protective coating?
The white "foggy" appearance in the lamp is actually a result of the long life feature and is normal. Overtime the PPC coating will also become clouded and this too is a completely normal occurrence. After two years my Air Knight unit indicator light still glows blues, is it still working right?
The blue indicator light does in fact let you know if the unit is operating or not. However the blue visible light is not an indicator of the relative output of UV energy. The UV output of the unit reduces with time, and after two year of operation it is recommended to replace the PHI cell to maintain optimum effectiveness.
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State License - CMC1249782