Rmh fireboxes etc and temps

Hi
Not sure if there is a thread for this already, if so, my apologies.

I am trying to find out(if any body knows perhaps) at what temp does your firebox burn white instead of black, regardless(or maybe it does matter?) If its a rmh or wood stove or fireplace etc. Trying to tweak my rmh so i dont waste wood, and dont burn the riser to no mans land quickly, as i normally just see how hot i can get it, and then the chimney gas goes abouve 500degrees, which i now found out is actually too hot.

Thank you in advance😉

Can you give any more details about your RMH? They are normally supposed to burn as hot as possible whenever they run, and the mass should absorb nearly all of that heat so that the exhaust is around 100-150 F. Much hotter than that is wasting heat unless the draft is so poor that an extreme temperature differential is needed to make it draw.

Where exactly is this 500 degree measurement happening?


Also, what is your riser made of that you are concerned about damaging it with heat? The whole core interior should be made of refractory material that is not affected by heat.

Well it is ouside, so there is no mass, the chimney runs straight up, about 3m.
Core is made from 10mm oxygen tank.
Temp is messured inside chimney about 1m from where it start(comes oit of the unit).
But i mostly wont to know at what temp does a firebox burn white and not black any more

I am not quite sure what you want to know but in a wood fired  oven, the inside of the dome will clear and  the soot will bun off at 375c.
Inside a well built rocket stove temperatures will be over 500c

Thats pretty much it, i have seen alot of fire places that is very black inside.
But mainly i needed to find out in which range of temps i should aim for when running the rmh.
When its really cold tend to run it much hotter, but once it warms up i prefer using as little wood as possible necessary to keep it from building up soot.
Dont have a gauge to tell me so have to slow it down, then take chimney gas temp, and adjust, after this all i would probably aim for chimney gas of about 200C.

Thanks for the info, was very helpfull, will post a pic, note its a smacked together rmh, not nice and neet like most ones i have seen

Hi
Is me, again
I have seen many rmh designs, but i am still wondering, where would the best place be to put your air intake for the rmh, and size, the why on location is more important to me than the where.

Think mine is perhaps too open.

Thank you

Sorry for the, well effy pic, thick thumbs but just to give an idea of my setup/issue

That is to broad a question to answer without more information.
I can see a picture of your design but I cant really see how it works, if you can show more pictures or draw a diagram, then I or somebody else will be more able to help you.

A basic Jtube design does not necessarily require secondary air and the main air travels down from above the feed and  into the fire box.
Make sure the dimensions are correct….. you can scale up or down but 6” is standard.

Looking at your drawing and your photo, I'd like to know if your current Rocket is built with a lower air intake and if you keep the cover over the feed tube at all times other than loading?
Fox's diagram is a correct J-tube design.  
Bringing in air from the bottom would encourage the fire to travel the shortest path... directly up the feed tube rather than horizontally to the riser.
Capping your feed tube would encourage the fire to go up the riser but it is not the best idea.
Perhaps an L-Tube design with a long burn tunnel would work better for you?