The Mueller A17921 features dual internal seats designed to provide complete isolation of individual circuits during change-over procedures

supporting stable flame rectification

Smith GPV and Lochinvar Series 100 residential power vent models

Precision Engineering: Features bi-metal construction for superior durability and C x C connections for secure

Enhanced Coil Protection: High-density metal or performance plastic construction shields delicate condenser coils from hail and debris

Nordyne M0074347R Blower Motor 321142-301 The Mueller A17921 features dualThe Nordyne M0074347R is an authentic OEM 1 HP ECM blower motor engineered for high efficiency performance in Intertherm, Miller, and Nordyne furnace systems. This electronically commutated motor operates on 120 240 volt single phase power, utilizing advanced microprocessor controls to maintain consistent airflow regardless of static pressure changes. As a critical component for manufactured housing HVAC units, this motor replaces legacy part numbers