Howdy. I dont have a stove as yet, but am saving up for one for next season. We have an existing masonry fireplace that we would vent the stove to and as such would need a stove with a rear flue collar. It seems that some cast iron stoves have reversible flue collars, but all of the steel stoves I have seen have been top vent only. Is there a reason for this? Does anyone make a good steel stove that has a reversible flue collar?