What is the difference between the LLL100XL and standard 100XL models

While common on GV series boilers

Smith 100109896 Dual Control (previously 1102R) is a high-performance immersion thermostat designed for precise temperature regulation in commercial water heating systems

Are vent protectors required for this model

Heil Quaker ICP 1175525 Motor 322057-301 What is the difference betweenThe Heil Quaker ICP 1175525 Motor is a heavy duty, permanent split capacitor (PSC) motor engineered specifically for demanding condenser fan applications. Operating at 460Vac, this 1 4HP condenser fan motor delivers a consistent 1100 RPM, making it a critical component for maintaining head pressure and heat exchange efficiency in commercial HVACR systems. This motor is a direct OEM equivalent to the 5KCP39HGS239S and is built on the industry standard