So one of my most anticipated projects has finally come to fruition. I built a rocket stove in my garage. My goal was to build it to code in Ontario Canada even though I'm pretty sure no inspector would ever give it a pass. It's worked very well right from the start but it's always a cold start and can take a while before it heats up.
I can only get the top of the barrel to 370 degrees celsius (700F) and that's using pretty small pieces of ashwood. My normal running temperature at top of barrel is about 250 degrees celsius, which is not bad in a well insulated garage, but I was hoping to get more radiant heat from it so I can have the garage door open in the winter and still get some nice heat while standing close.
Maybe someone here has some ideas about how to get it hotter, should I insulate around the feed chamber and the portion of the fire box outside of the barrel? different type of wood?
It burns really nice though, there's no smoke at all out the chimney once it reaches temperature. I still have a few cosmetic things to do to finalize it. If you're wondering why it's on a stand it's because in a garage the bottom of the firebox has to be 18" off the floor. Oh and if you notice something that's not to code let me know.
Hi Richard; Welcome to Permies! And Welcome to the world of Rocket science!
Nice clean build you made there Rich looks good!
Is that a 6"or 8" rocket?
I think that wrapping ceramic blanket (if you have it) or other insulation (?rock wool maybe) around the entire lower unit. Including the lower barrel will help.
Your firebricks will still need to come up to temperature. But you wont be losing heat before the riser.
What is your riser made of? Heavy firebrick? Or ceramic blanket?
If the answer is heavy brick then you should insulate around the outside of the riser.
You want your heat maximized inside the riser creating the super hot temps that you are hoping for.
You might, if you have the head room. Add a second barrel. I added a second barrel on my shop build and it makes a huge difference in how fast it feels warmer in the room.
My brick bell takes hours to fully heat up but the barrels make the shop workable in no time.
Welcome Richard! Its great to see people striving to integrate RMHs into current code restrictions - I think it really helps with their adoption and acceptability.
Do try some different wood - notably different widths of wood. Its generally the case that the closer the wood is to kindling (the more surface area it has) the faster/hotter it burns. There are also significant differences in the quality (density) of the wood and how well dried it is. For instance although I love burning dropped sticks, its still hard to beat a kiln dried 2x4 end that is split into about 20 pieces!
You may also find that some small tweaks ( a "trip wire" and/or P-Channel if not already installed) will help it burn better - although it seems that burning is already working well.
Aim High. Fail Small.
It's never done THAT before. Explain it to me tiny ad: