By replacing worn internal parts with this kit

tangential flow

while the zone-hardened inner ring with 120° spacing setscrew lock ensures secure shaft retention

it allows for precise airflow tuning to optimize furnace blower motor efficiency across heating and cooling cycles

the switch logic ensures the fan switch makes and the high limit switch breaks on temperature rise

Fulton Boiler 2-12-000554 Gasket 324846-701 By replacing worn internal partsThe Fulton Boiler 2 12 000554 Gasket is a critical sealing component for the air flapper assembly used in high efficiency pulse combustion systems. This air flapper gasket is engineered to maintain a precise, airtight seal at the intake, ensuring optimized combustion air ratios and preventing air bypass during high velocity cycles. For technicians servicing Fulton boiler parts, replacing this gasket is a standard requirement during annual maintenance