The only feasible way I could imagine running my duct lines to keep the heat and smell out of my grow room would be to run the duct tto the furnace/hot water heater stack going up three floors to the roof.

Has anyone vented their room this way? Would i need a back flow vent to keep the smell from winding back up in my room?
joewig1980 Reviewed by joewig1980 on . Ventilation through furnace/hotwater heater stack? The only feasible way I could imagine running my duct lines to keep the heat and smell out of my grow room would be to run the duct tto the furnace/hot water heater stack going up three floors to the roof. Has anyone vented their room this way? Would i need a back flow vent to keep the smell from winding back up in my room? Rating: 5