rocket stove oven/ hot water heater ideas...

So I had this idea and knew i wouldnt be able to explain it well so i said hey ill just draw it on paint... well I soon figured I hate digital drawing with a passion! well i hope the drawing gets my point across. My idea was to try to add an oven to the rocket stove principle and I just wanted feedback on the best ways to experiment with that. this drawing is by no means to scale but i got as close as I could... So my thought is if the heat from the heat riser hits a metal box with a door on the front. the heat would them pass by 5 of the 6 sides of the box then out to the exhaust. I just wanted to see peoples feed back on the hot water idea as well by useing thermosyphoning. OK now tell me everywhere i might run into problems AND!!! how to fix them! thanks!

I, too, have been trying to brainstorm for such an idea- creating an all inclusive system running off of one RMH. The more I research, the more I realize how its easy to inhibit the function of the RMH as a super efficient wood stove. I think the water heater is very doable, if well planned, thought out and executed. It seems to me, if you allow yourself to either use an outside (Ernie's double chamber cob oven seems excellent) or somehow rig up an attachment to store or insulate heat for the oven function.

Though, I am also curious about thermosiphoning capabilities w/ RMH. Heating batches of water, I think, would be preferable. I believe it has been mentioned the problems with constantly using water as a thermal battery on these forums. I've considered getting rid of the RMH water heater idea, using a passive solar design for decently hot water for daily stuff and instead having a bath tub that has its own smaller RMH that can store heat for nice long hot baths, perhaps using ferrocement, as its been used for cisterns, but I'm unsure of its thermal capacity or if it would hold up under high heat from the RMH. But for a smaller place or for someone living by themselves, that may be a bit impractical.

Just a few thoughts- I have yet to construct a RMH, so keep that in mind.

i feel like the oven would be just like the heat hitting the top of the 50 gal barrel cept instead for being forced downwards the heat would continue to rise creating more of a pull that could push the exhast potentially farther...

you can build an oven right on top of the barrel no redesign needed. just a bit of insulation. Water heating is something everyone moves to when thinking about rocket stoves. its not hard to heat water, it is hard to heat water in the right place so you dont mess up the function of the stove. Water is thermal mass and the best way to deal with it is that you have little thermal mass other than water.

Paul talks with Ernie and Erica about rocket mass heaters in this podcast: rocket mass heater podcast

They talk about heating water with rmh's and safety.