KingCoal wrote:you will loose far to much heat by using the upper by pass exit.
that will defeat the whole down draft principle. believe me, your stove will work best as the makers intended. i know it was marketed as a dual fuel and it's easy to assume that the 2 fuels should be fired somewhat differently, but in this case, the riteway 37, is a way better coal burner than a wood burner.
I fired one like this before, with a single top exit on the side, very similar grates, bimetal draft control. It didn't have a combustion flue or mid level exhaust flue. I didn't even use an mpd or baro, just straight up and out the roof. it heated the house for 4 years. barely put 3 tons of coal a year though it, most times only 2.5 tons, and it was HOT. bottom line the Riteway will still heat well with one inlet, one outlet. lets face it, we can burn coal in any steel box or barrel its going to burn. the Riteway secondary combustion feature was marketed primarily to the wood burning market. secondary air on a coal stove today is pretty much standard operating procedure. the glass doors on a modern stove have that air wash feature that is also secondary air. without it beware the puffbacks when opening the fire door.