Johnson Controls A421AEC-02 Temperature Control 30067439-890 it features a 1/4" NPT

it features a 1/4" NPT process connection and a 1/8" NPT vent port

making it ideal for units with standing pilots

What specific systems is the Bard 5152-091 blower wheel compatible with

Durable Construction: Features a robust thermoplastic body and high-conductivity terminals to withstand the rigors of high-static HVAC environments

Johnson Controls A421AEC-02 Temperature Control 30067439-890 it features a 1/4" NPTThe Johnson Controls A421AEC 02 is a heavy duty single stage electronic temperature control engineered for precision in demanding HVACR environments. This unit serves as the direct replacement for A419AEC 2 and A419AEC 2C, offering a critical upgrade for contractors maintaining refrigeration, space heating, and cooling systems. Housed in a NEMA 4X enclosure (IP66), this controller is built to withstand wash down environments and high moisture