Which heater models use this specific adjustment knob

High-Performance Safety: Integrated ball check limits gas leakage during diaphragm failure while maintaining normal operational sensitivity

Vent limiters are designed for indoor use

making it a staple for HVAC service kits and boiler repair applications across residential and commercial heating systems

When you're servicing fractional horsepower systems

Packard A65105 Fan Blade Which heater models use thisThe Packard A65105 is a high performance 10 inch aluminum fan blade engineered for precision in condenser and evaporator applications. Designed with a 5 blade configuration and a 20 degree pitch, this unit optimizes CFM output while maintaining structural integrity under high torque. It features a 1 4 inch hub bore with a CCW (Counter Clockwise) rotation as viewed from the discharge side. The intake side hub location ensures the air flow is directed