has anyone used this thimble with OAK ?
http://www.amazon.com/DuraVent-4CAS-WTPK-PVP-Wall-Thimble/dp/B005EZ7158
Does it actually draw the combustion air through the outer wall of the exhaust pipe, or does it just pass over the outisde of the exhaust pipe throught baffles in the thumble ? I cant find any pictures of what the inlet looks like on the outside of the house.
Any help or comments are greatly appreciated,
francis
http://www.amazon.com/DuraVent-4CAS-WTPK-PVP-Wall-Thimble/dp/B005EZ7158
Does it actually draw the combustion air through the outer wall of the exhaust pipe, or does it just pass over the outisde of the exhaust pipe throught baffles in the thumble ? I cant find any pictures of what the inlet looks like on the outside of the house.
Any help or comments are greatly appreciated,
francis