Chad Smyth

Glenn,  as we have been talking about using one in a small space I think I will start with your design and go from there.  The one thing I can't seem to find is what is the minimum clearance around the sides including the exhaust. That's using all brick.

Thanks Glenn, that's why I would use a cement board on top, to keep anything from squeezing out.

Satamax, wish I could post a drawing.

OK change of plans.  We are going to build a 14' x 14' A frame cabin (about 15' center height).  So can go with a bit bigger RMH as we have more to heat.

In building the stove could I use 16" x 8" x 8" cement blocks with the holes showing then a one brick high (2 1/4") "wall" around the top filled with perlite then a 1/2" sheet of mason board on top of that as a insulated base against the plywood floor?

Here is what I think the bell area would be:

4" sq raiser made of 1"  thick insulated material with 3" between that and the outside brick. That would make the outside of the bell about 20" sq. (12" sq id).  Would it help to have double brick?  Given this size how long should the burn tunnel be from raiser center to front of batch feed opening?

How hot is the exhaust when it first comes out?  Could ducting rated at 420* F work?

I emailed Lars and he thinks it would be to much for 100sf.  He is going to sent me the plans.  Will use a 4" batch feed. As I will be going vertical with the exhaust (4" pipe inside brick or just brick?) should there be a double wall between it and the bell or can they share a wall?

I really appreciate the help.  

Thanks for the video, that's what I'm thinking of.

Satamax:  A 4" or a 6"?  Would it hold heat  to keep the place at 50* F by the end of 24 hours?  Why a fiber raiser, why not just two pipes with insulation between them?  And would a round metal bell with bricks around it (square) be better than just a brick one?

Due to limited space the longest it can be is 36" and the widest 20".  Doesn't matter if its a j-tube or batch, whichever one puts out the most heat.  I could do a 6" system but in your other post you said a 4" would be better.  Would having 2 bells work better? One about 7' high and the other about 5', both 12" x 12" id?  The temp. doesn't have to stay 65* all night but shouldn't get below 50* if possible.

Thanks again.

Thanks guys.  

Back to the drawing board and this is what I come up with:  12" wide x 36" long, give or take a few depending on brick size.  A 6" square fuel feed, 4" square burner,  4" inside a 6" raiser (both round) with a 8" square (inside) brick bell then a 4" round stovepipe exhaust inside a brick chimney. Two sides could have a 7' brick wall on them the width of one brick.

Now the questions.  Would this work?  How much heat do you think it would hold/give off and for how long?  How long should the burner be (center of feed to center of raiser)?  How high should the bell be (it will have a metal top)? And last should the stovepipe have sand between it and the brick?

I live in Alaska and our winters have been getting warmer as the years go by but we could have -20* F at times.  Would like to keep the place 65-70* F. and not have to keep putting wood in every 30 minutes.