The Lennox 21J78 Bottom Power Entry Kit is an OEM electrical accessory designed to provide a clean and efficient method for routing power and control wiring through the roof curb on compatible Lennox packaged HVAC units. This kit allows electrical connections to enter from the bottom of the unit, helping reduce the number of roof penetrations and supporting a cleaner, more weather-resistant installation.

Engineered specifically for use with Lennox PR, PRP, LRP, and Q-Series packaged units, the 21J78 kit supports both low-voltage control wiring and high-voltage power connections. It includes multiple bulkhead connectors sized to safely pass wiring through the base pan while maintaining proper strain relief and electrical separation. This makes it suitable for standard unit power as well as electric heat applications where required.

The kit also includes a main power harness for gas units, along with mounting hardware and grommets to ensure a secure, professional installation. Ideal for new installations or retrofit applications, the Lennox 21J78 Bottom Power Entry Kit delivers OEM fit, reliable performance, and compliance with factory installation requirements for Lennox packaged rooftop units.