The redesigned X-Plus UV fixture from UV Resources accommodates 17- to 61-inch extended base lamps, which easily mount from the exterior of any HVAC system, air handler, plenum or duct, making it a low-cost, reliable and quickly serviceable unit favored by contractors. Because the NEMA-rated unit mounts from the exterior and requires no interior unit access, the redesigned X-Plus extended UV-C lamp-base series is ideal for hard-to-access outdoor and indoor HVAC equipment up to 30 tons, including rooftop package units, through-the-wall, or fan coil units. Benefits from the new X-Plus include improved heat transfer, reduced energy use, lower odor and maintenance, reduced cleaning downtime and damage, and “sustained” capacity of an air conditioning system… while improving IAQ. The inexpensive single-ended fixture accommodates lamps up to 61-inches in length and offers important safety features that include a lockable access cover, two power interlocks that limit UV exposure and prevent electrical shock, and a shatter-proof lamp option. Suitable for new systems and as a retrofit product, the rugged and extremely adaptable X-Plus fixture can be easily installed in most light-commercial, commercial, industrial, healthcare and high-security applications.