Where should Uv Germicidal Lights be Installed in a Furnace?

For optimal performance and safety, UV germicidal lights should be installed in specific locations within your furnace and ductwork to target microbial growth and maximize air disinfection.

Key installation locations include:

• Upstream of the Evaporator Coil: This is considered the most critical area for treatment. Because the coil is often dark, cool, and damp from condensation, it is a primary breeding ground for mold and biofilm. Illuminating the coil and the adjacent drain pan helps keep these components clean and improves heat exchanger efficiency.
• The Return Air Duct: Positioning a UV lamp in the return duct allows for the continuous disinfection of incoming air before it reaches the furnace and coil components. This configuration effectively treats all the air moving through the system.
• The Blower Compartment: Certain systems, such as the Healthy Climate Carbon Clean 16, may have manufacturer guidelines suggesting the lamp be mounted near the blower for targeted treatment.

Important Installation Considerations:

• Moisture Protection: Avoid mounting lights immediately downstream of cooling coils or too close to humidifiers, as excessive moisture can cause condensation on the bulb, reducing its output and lifespan.
• Safety and Visibility: UV lights must be positioned so they cannot be viewed directly by occupants and where radiation cannot leak from the system. All installations must follow safety standards, such as those from the CSA Group.
• Accessibility: Lights should be installed in an accessible section of the ductwork to allow for annual inspection and bulb replacement.

• UV Germicidal Lights for HVAC: Complete Home Guide