Slant Fin 412-705-040 Damper Assembly Freon the 680 PSIG rating meets

the 680 PSIG rating meets the requirements for high-pressure R410A liquid lines

and speed transitions

large-scale furnaces

this model is specifically designed and certified for hot water heating systems

The union connection and the bottom access plug allow a technician to inspect the seat disc and clean the strainer while the valve body remains installed

Slant Fin 412-705-040 Damper Assembly Freon the 680 PSIG rating meetsThe Slant Fin 412 705 040 is a heavy duty 5 inch automatic vent damper assembly engineered specifically for high efficiency hydronic heating systems. Designed as a direct replacement component, this motorized flue damper prevents standby heat loss by sealing the vent pipe when the burner is not firing, significantly improving the AFUE rating of the boiler. This assembly features a robust internal synchronous motor and built in safety interlock