Slant Fin 412-705-040 Damper Assembly Freon and speed transitions

and speed transitions

providing significant flow rates with minimal pressure drop

this local sensing electrode is designed to provide the high-voltage spark and then return the microamp signal for flame verification to the control board

it provides stable modulation without the risk of hunting

Slant Fin 412-705-040 Damper Assembly Freon and speed transitionsThe 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