[lotsalogs]

Thanks HAYZEE. That makes sense...and it would stand to reason that, even when not burning, my middle flue has a positive draft because it can allow sufficient warm air to flow into the flue from the woodstove on the second floor.

Do I need to worry about degredation of the masonry flue due to trapped moisture after I seal it? We may make that room a den in the future, at which point I'd like to install another stove.

Thanks Again,
Bill