convert a hungarian bread oven into something bell like or rockety

I was trying to work out how to improve the running of this old beast, i used half a cord of wood last year just trying to warm it up. Does anyone have any ideas as its quite a feature in the room and it would be great if i could heat my house with it.
the dimensions a 170 tall and 150 wide at the base here is a sketch of the inside and some photos any response or ideas would be wonderful.

Where is the firebox in your diagram?  Below the oven?

Antony, do you want to keep using it as a oven? Or you are not bothered?

What is the size of the firebox's entrance?  If i get it well, the oven's door is not the same as the firebox entrance? What size is the door?

Firebox has the chimney right above?

What size is the grate door?

By your drawing, i get a bit lost. But i think something should be possible.

Hi and thank you so much for your interest, sorry for the confusion. The fire box is the same as the oven door only its in front. This oven was started by making a fire in the front and then pushing the embers into the bell to smolder and burn a bit pizza ovenish. The front of the oven the exposed brick side has two doors the top door is the fire box/ bread oven entrance, the lower door is the ash pit and air vent. the grate is inside the firebox allowing the ash to drop and air to feed the fire. The drawing is a little confusing as the kitchen side of the oven is in front of the sitting room dome side, the photograph just shows you into the bell dome behind the firebox. I hope that helps. Oh and the size of the doors are fire box oven entrance 40x25cm the air vent ash door is 20 13cm
I hope this helps.
Thanks again Antony

Oh, as for using the oven as was I don't mind whatever outcome or idea suits the situation.
Thanks again to all.
Respect Antony

Sorry forgot to mention yes the chimney is directly above the firebox.

here is a view inside the oven/firebox and ash pit doors

I have an idea, but it's all a bit tight. How skilled are you. Are you willing to go for major work on this?


My idea, on your drawing, the ash pit seems quite wide, despite having a small door. I would carve out all the bricks needed to make a firebox in place of this ash pit. In a rocket, it proves more often than not, to impair the functioning of the rocket. With a big angle grinder, you could cut the red brick fascia to the right size for a door, without demolishing it. And you could, if it is as suspect; mortared with clay; remove the bricks behind with a crowbar etc. To make the room for the batch rocket. May be, all depending on what room you have, you could extend the firebox forward out of the fascia if need be. In this case, you could also top it with cast iron for cooking. Then you could, if you are confident enough, scrape a few bricks on the side from the passage between firebox and dome.  And fit a broken riser. http://donkey32.proboards.com/thread/1023/accidental-discovery to feed the dome, which is a basically bell.

If, and only if your ash pit is wide enough. and you have room to the sides, you could extend the chimney downwards with a tube of the same size as the heat riser. Called a plunger tube . This is for the purpose of keeping more heat in. You will need to make your oven door airtight in this case. And with all this, if you managed to carve out enough of the old bricks to the sides to fit the broken heat riser and plunge tube. You could still have a functional bell/oven.

Thankyou for your input i will read and think over what you surgest and get back to you on your ideas.