The Hussmann 428604 Wire Heater is a crucial component for Hussmann multi-door merchandisers, typically found in grocery stores and convenience stores. This heater, designed for 5-door frames, uses 10-24 threads and a 0.3" square knob mount for easy installation. It generates a small amount of heat to prevent ice buildup on the door frame, ensuring proper door closure and maintainin... https://partsfe.com/428604-wire-heater-for-5-door-frame