System Efficiency: Minimizes pressure drops across the filtration stage

Designed for multi-refrigerant compatibility

and PDP series

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

Reznor 121275 Block System Efficiency: Minimizes pressure dropsThe 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