the 257 features a totally enclosed air over (TEAO) cast iron housing that protects internal components from ambient moisture and debris in rigorous environments

Technicians can replace the internal diaphragm

Its dust-resistant steel encasement is specifically designed to manage heat dissipation during long-cycle operations

System Efficiency: Maintains the 22309501 airflow dynamics required to keep your heating equipment running at its rated efficiency levels

With a 1/4" NPT port size and a 5/32" orifice

Trane MOT3139 Motor THPU32HP7Y the 257 features a totallyThe Trane MOT3139 is a high performance, OEM replacement motor designed specifically for draft induction and combustion air applications in residential and light commercial HVAC systems. This 115V single phase motor operates at a high speed 3000 RPM with a clockwise (CW) rotation, ensuring the precise static pressure required for safe heat exchanger venting and efficient ignition cycles. Engineering specifications for the MOT3139 include a robust 3. 3