and materials are identical for both part numbers

Optimized Airflow Dynamics: The 18-inch diameter and specific blade pitch are calibrated to meet original equipment manufacturer specifications for efficient HVAC airflow

The White-Rodgers F866-0124 Prefilter is a critical OEM component designed for high-performance electronic air cleaner maintenance

as limit setpoints vary significantly across different BTU ratings and unit heater generations

Cleveland Controls DFS-221-228 Pressure Switch and materials are identical forThe Cleveland Controls DFS 221 228 is a high reliability, non adjustable airflow proving switch designed for critical monitoring in duct heaters, ovens, and sophisticated energy management systems. Engineered for technicians who require a "set and forget" solution, this SPDT air pressure switch is factory fixed to operate on a pressure rise of 0. 05 0. 02" w. c., ensuring precise safety interlocks. Its compact, open mounted design is specifically