The HVAC UV light should be installed in the supply plenum with an unobstructed line of sight to the evaporator coil and the drain pan. This spot targets the damp coil surface where biofilm often forms and keeps the pan area cleaner between routine maintenance. In practice, the lamp is mounted so the UV-C shines directly on the coil face, not into ductwork where air moves past too quickly to matter. For homes like those around Blue Mounds, technicians typically set the lamp just downstream of the coil so light reaches the wet side without blasting nearby plastics.
- Place the lamp so it illuminates the entire coil face and pan.
- Shield or distance UV from wire insulation and plastics not rated for UV.
- Maintain manufacturer clearances and ensure the housing is sealed for safe service access.
Always shut off power and protect eyes and skin from UV-C during installation or service.
Updated: 2026-07-08
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