Fresh-Aire UV, part of Diversitech Corporation, is the premier manufacturer of the APCO, APCO-MAG, APCO-RT, BlueTube, APCOX, APCOX-MAG, Blue-Tube UV-X, AHU, Enhance-ION, and the Tight Fit Kit. The APCOX line comes in a single and dual lamp configuration in 18-32vac as well as 120-277vac with 3 Year lamps and a lifetime guarantee on the unit except the lamp.
