do i need a water heater exhaust fan?
I have a gas water heater in my basement that vents up through my chimney. My furnace does not vent through the chimney -- it is a direct venting system.
My question is: Should I buy some sort of exhaust fan or booster to make sure the water heater exhaust is forced up the chimney?
The reason I'm asking is becuase sometimes I use the fireplace to burn a duraflame, and I've noticed that the chimney has a downdraft and until I get an updraft going with burning newspaper, the logs blow smoke back into my house.
So, I was wondering if it is possible that the carbon monoxide from my water heater exhaust could be getting blown back into my basement also, in the same way?
How could I check this? And, if it was happening, how would I address it? Fan? or, something else?