Borja Diaz

I think the hot gasses could be slowed down by putting two pieces of sheet metal that makes the gas path longer allowing a more efficient heat exchange. I think that it would be better if I could put a sheet metal above the upper water jacket but the jackets are at different hights and there is no way I can put one there, so heating up the sides of the boiler in that section is the best I can do.


Do you think this could work?

Here you have some pics showing the dimensions of my boiler.

suggestions are very welcome

C.Ray Gill: Thanks for both the posts and your kindness for defining my english as "fine"

Bob is right, I am trying to get a cleaner burn using a rocket stove and use the hot fully burnt air to heat up the heat exchanger.


If I understood it right, the downdraft section´s purpose is not to help burn the fumes but to release some of that heat to the outside, correct?


The problems are that 1- My heat exchanger lies on my garage floor and it is really heavy (800lbs or more).2- The flue pipe, coper piping, safety devices etc have been already fixed so even if I could lift it I would have to call a plumber to rearrange all the system setup. 3- The flue pipe is already in an angle close to 45 degrees, if the heat exchanger was in a higher position the angle would be even lower and maybe the system would not have enough draft to move the hot air up the flue pipe.

I guess I could build a RMH with a burn chamber so high that could be connected to my heat exchager via the upper door (the wood feed) but I am afraid that it would not be really efficient since the hot air path would be very short, not giving enough time to the heat exchanger unit to absorb much heat.

What do you think?

Hi everyone,


Recently I installed a furnace/ water heater that heats the radiators at my place, the system works great but:

1- It demmands a lot of wood

2- Creosote builds up really fast.

I was wondering if I could adapt a rocket stove to my furnace so I can get a cleaner and more efficient burn. I attached some drawings explaining how my furnace works and an idea of how could I adapt a rocket system to it (?).

Has anybody tried something like this?

Thanks and sorry for my terrible english