Post by Ralf on Jan 12, 2016 21:11:17 GMT -8
A hearty hello,
after becoming a RMH addict and absorbing tons of information I found here and at permies.com, I started to build.
My plan was to avoid asking a lot of questions and use all the good advice, but I have to make one exception:
My build is a standard 6-inch J-tube system according to „the book“, P-channel and trip wire included, only high quality and insulative refractory material in the flame path, metal (all stainless) beginning only on the outside of the heat riser.
I´ts located in a one-story brick shack with two rooms, each 12 sqm / 130 sqft, combustion unit will be in one and thermal battery in the other room.
For the thermal battery I plan a straight low bench which could be up to approx 4 m / 13 ft long or shorter, depending on calculated flue run or max. ISA of a bell. Connection to a 3.5 m / 11 ft chimney will be on the same end as the input.
I like the idea of a low friction but almost complete heat extraction, hence the questions:
* For the setting described, would you recommend
a) traditional flue in system size, running back and forth with a u-turn,
b) an analogue but shorter run with an increased pipe diameter (8 inch, Matt Walkers bench comes to mind)
c) a half barrel bench (inspired by Kirk Moberts recent retrofit, I can get stainless barrels of 60 cm /23 in diameter) ?
* Is the recommended maxium bell ISA the same for batch boxes and J-tubes ?
* If a half barrel bench is an option, how to seal it securely from gas leakage, is it enough to cob it in ?
* Best spot and method for installing inspection access(es) ?
* How to drain eventual condensation from a long half barrel bell if it sits on a floor slab ? I was thinking of a sealed and angled internal floor with a drip line at the lowest spot. I´ve got plenty of big concrete paving slabs for construction.
* Best positions for feed and exhaust when they have to be located at the same side of this dead end - low ceiling bell ?
I could also try and put in the half barrels in with the cut face up to ease condensation collection and drainage, build the bench so that the load is not on the half barrels and rest them in perlite insulation underneath. Good idea ?
Thanks for your valuable time answering these questions. I´m documenting my build with a lot of filming and photographing, when it will be up and running I will return some of the brilliant input I got here !
Cheers
Ralf
after becoming a RMH addict and absorbing tons of information I found here and at permies.com, I started to build.
My plan was to avoid asking a lot of questions and use all the good advice, but I have to make one exception:
My build is a standard 6-inch J-tube system according to „the book“, P-channel and trip wire included, only high quality and insulative refractory material in the flame path, metal (all stainless) beginning only on the outside of the heat riser.
I´ts located in a one-story brick shack with two rooms, each 12 sqm / 130 sqft, combustion unit will be in one and thermal battery in the other room.
For the thermal battery I plan a straight low bench which could be up to approx 4 m / 13 ft long or shorter, depending on calculated flue run or max. ISA of a bell. Connection to a 3.5 m / 11 ft chimney will be on the same end as the input.
I like the idea of a low friction but almost complete heat extraction, hence the questions:
* For the setting described, would you recommend
a) traditional flue in system size, running back and forth with a u-turn,
b) an analogue but shorter run with an increased pipe diameter (8 inch, Matt Walkers bench comes to mind)
c) a half barrel bench (inspired by Kirk Moberts recent retrofit, I can get stainless barrels of 60 cm /23 in diameter) ?
* Is the recommended maxium bell ISA the same for batch boxes and J-tubes ?
* If a half barrel bench is an option, how to seal it securely from gas leakage, is it enough to cob it in ?
* Best spot and method for installing inspection access(es) ?
* How to drain eventual condensation from a long half barrel bell if it sits on a floor slab ? I was thinking of a sealed and angled internal floor with a drip line at the lowest spot. I´ve got plenty of big concrete paving slabs for construction.
* Best positions for feed and exhaust when they have to be located at the same side of this dead end - low ceiling bell ?
I could also try and put in the half barrels in with the cut face up to ease condensation collection and drainage, build the bench so that the load is not on the half barrels and rest them in perlite insulation underneath. Good idea ?
Thanks for your valuable time answering these questions. I´m documenting my build with a lot of filming and photographing, when it will be up and running I will return some of the brilliant input I got here !
Cheers
Ralf