Industrial Grade Durability: Constructed to resist oxidation and thermal stress in high-demand HVACR systems

the 006872F is a primary inspection point to ensure the power interface is functioning

System Efficiency: Minimizes pressure drops across the filtration stage

5 part ensures the oscillation and mechanical timing of the valve remain within narrow operational tolerances

Engineered for high-volume commercial duty

Reznor 121275 Block Industrial Grade Durability: Constructed toThe Reznor 121275 Stack Flue Block is a high limit safety component engineered specifically as an Energy Cutout Device (ECO) for commercial and industrial gas fired heating units. Designed to monitor the integrity of the ventilation system, this blocked vent switch acts as a critical failsafe by measuring exhaust temperatures at the flue. If the sensor detects a restriction, backflow, or overheating condition where temperatures reach the 275F trip