For all your Montana Masonry Heater parts (also known as) Rocket Mass heater parts.
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Eric Hammond wrote:How long did the fire burn before taking the measurements? The initial observations of mine, seems like it takes forever for the firebricks to warm up, and then once they are hot, the ducting temps start to climb. Those IR temp guns don't work well on shiny surfaces like HVAC ducting. For about the first twenty minutes I can hold my hand on any section of my ducting. After that, most sections are too hot to touch. The pipe that leads up and out the roof, I can hold my hand on that one for almost an hour, after about an hour of a rip roaring fire, then the chimney pipe gets too hot to touch. I attribute it to the fire bricks reaching temperature. I lit a fire yesterday and when I went to start a fire today almost 18 hours later, the bricks at the roof of the burn tunnel had just a touch a noticeable heat to them.
I bet after a longer burn, your temps will come up a quite a bit.....and the smaller the diameter the wood, the greater the surface area, and the hotter it will burn.
!
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
thomas rubino wrote:Hi Stacie;
IF you really have to much draft... and i'm not so sure of that yet. Then Max's idea is a good one. Here's how a bell and plunger would work
Where your current exhaust pipe leaves the mass, instead of it connecting directly to your outside chimney you would build a brick box . your mass woulds vent into that box(bell). Meanwhile your chimney is then plumbed into the same box but with a section or two of stove pipe would extend (the plunger)towards the bottom of the bell. Your rocket vents into the bell, the hottest air rises and the cooling air sinks where it gets drawn into the outgoing chimney. When he mentioned an adjustable plunger ,that is a sliding pipe (won't work with your set up) that starts out high in the bell to get the draw going and then is lowered down to maximize how much heat is staying inside.
I think you need a bunch more fires to decide that you have too much draft.
Your firewood needs to be much smaller to start with. When I mentioned free Pallets I was very serious, a lot are hardwood ,all are free and they are very dry thin wood. Rounds of any dia are just going to start harder. Save them for now or split them down.
Your stove did super awesome for a first burning !!! Way better than I warned you about ! Way better than my first rocket did! We are Proud of you and your accomplishment ! Don't stress this draft thing. Learn how your stove lights. Dry that mass out. Get smaller wood , take temp readings . You GOT THIS !
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
Satamax Antone wrote:Is your's pulsating like this,
If yes, that's bad.
regards, Peter
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
Satamax Antone wrote:Hey Peter, no worries.
I must not have been awake yet! Have you heard this one? I'm pretty sure i know how it can be replicated. Well, kindof.
regards, Peter
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
Staci Kopcha wrote: Oh lordy, though, do we have pallet wood- my husband has a fine collection! Some are broken down, but those I am not sure of Heat treated or chemical treated- is that okay?
For all your Montana Masonry Heater parts (also known as) Rocket Mass heater parts.
Visit me at
dragontechrmh.com
For all your Montana Masonry Heater parts (also known as) Rocket Mass heater parts.
Visit me at
dragontechrmh.com
I am all ears how it could be replicated....
Stacy, here are examples of a plunger tube.
https://permies.com/t/69146/Bell-questions
Those IR temp guns don't work well on shiny surfaces like HVAC ducting.
Silence is Golden
For all your RMH needs:
dragontechrmh.com
Daniel Hatfield II wrote:
"I too started with pipes then migrated to pipes leading to a bell, then just got rid of the pipes all together and made it one bell. I am certainly not regretful of doing any of these modifications as they all have taught me so much of how hot gasses flow and am still learning."
Gerry. I'm trying to decide whether to build off the same plan as Staci or to use the bell. Given the issues, folk have with controlling the draw using pipes (and mitigating through adding or removing bends) how is the draw controlled using a bell? I have a lot of rubble and clay I was planning to use for the flue heat exchange but I can also get my hands on a thousand bricks if need be very easily. I'm in Australia and the flue is quite expensive compared to colder countries and Tees are a $100 a pop. How does a bell bench hold on to heat compared to a pipe heat bench, please?
Thanks
Dan
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
Daniel Hatfield II wrote:how is the draw controlled using a bell?
How does a bell bench hold on to heat compared to a pipe heat bench, please?
Thanks
Dan
Daniel Hatfield II wrote: I'm in Australia and the flue is quite expensive compared to colder countries and Tees are a $100 a pop.
Staci Kopcha wrote:2) In pictures, you can see the cob drying nicely on areas around the barrel and on the manifold (light grey), in contrast to the dark grey of the bench.
Silence is Golden
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Staci Kopcha wrote:
Some things of note:
1) a HUGE win: I turned off our house heater today (forced air, gas) as it was warm in the day and forgot to turn it back on in the evening, and YET the house temperature at 8 pm was 66 F ( I usually keep it set at 64 anyways, cheap) AND then IT WENT UP to 67- ALL because of this charming heater in our playroom!!! Speaks much for what it will do for our normally cold and drafty house this winter!! I am thrilled!!
Daniel Hatfield II wrote:
"Daniel Hatfield: I think I jumped to conclusions and it is turning out to be a good system for our little house. What type of space are you needing to heat?"
430 square feet. it will be straight on a wall (not L shaped) because of the layout.
This is in my studio/office. if I make it look nice I get to build one in our living room.
I'm worried about the draft now as it will effectively be shorter without all those turns.
I want to keep it as simple as possible for my first indoor build.
Staci Kopcha wrote:
Daniel Hatfield II wrote:
"Daniel Hatfield: I think I jumped to conclusions and it is turning out to be a good system for our little house. What type of space are you needing to heat?"
430 square feet. it will be straight on a wall (not L shaped) because of the layout.
This is in my studio/office. if I make it look nice I get to build one in our living room.
I'm worried about the draft now as it will effectively be shorter without all those turns.
I want to keep it as simple as possible for my first indoor build.
Ernie and Erica have a nice little one, no "L" . (link below) I haven't seen the plans, but it is a single short bench on an 8" system. Curious about the layout. Anyways, it may be another option and save you the cost of some of the ducting that was $$/hard to get in your area.
AND it looks "nice:, so it may pave way to the living room.
https://permies.com/t/40984/Rocket-Mass-Heater-Plans-Cabin#319710
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
regards, Peter
Staci Kopcha wrote:
Satamax Antone wrote:Stacy, a bit of history.
Peter van den Berg wrote:Specifically for how bell systems are done, see http://batchrocket.eu/en/building#belltheory
Dan Hatfield Ii wrote:Do you have any resources (sizing or maths) in bell bench building (stratification chambers).
I’m considering going that route to save money and time on flue fittings.
regards, Peter
Staci Kopcha wrote:Hi,
Still firing and working on cob here. Endless cob.
Start ups are going much better! Burning cleaner!
Question on thickness of cob:
I know top of manifold is about 5 and 6" above pipes, but:
1: the rest of the manifold?
2: fuel feed?
3: res of pipes: is it 6" all the way?
Thank you!
Well, a pipe system will heat the area right above it faster than along its edges making hot spots or hot lines along the mass. The further you get towards the exhaust the cooler these lines will become.
Silence is Golden
For all your RMH needs:
dragontechrmh.com
God of procrastination https://www.youtube.com/watch?v=q1EoT9sedqY
Yeah, but how did the squirrel get in there? Was it because of the tiny ad?
A rocket mass heater heats your home with one tenth the wood of a conventional wood stove
http://woodheat.net
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