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Exhaust Chimney parallel to wall good idea?  RSS feed

 
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Hi all,

In case my rocket mass heater won't have enough draft I will have to build a vertical piece on the end of the end of the exhaust.

But the roof is very high , and it would be really expensive to make the exhaust stick out about the rooftop.

Would it be a good idea just to have it exit parallel to a wall?


 
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Joey Johnson : No, This is not the place to go cheap, plan your budget from the very beginning to raise a final chimney to a point 4' over the peak of the
roof!

You are giving yourself every advantage if you bring the final vertical chimney up through the center of your home, pass the roof with an insulated pipe/
chimney on the downwind or lee side of the house !

Starting with a well braced floor, insulated from the heat of the combustion core, the taller you make your Heat Riser, the more 'Draft' you are creating,
the insulation wrapped around the outside of the Heat Riser will help create the marked temperature difference between the internal hot rising exhaust
gases, and the external column of rapidly cooling dense/heavy and falling Exhaust gases! This provides the work energy required to push the exhaust
gases 30' horizontally with a 6'' system !

The Transitional area where the falling exhaust gases turn at right angles to flow into the horizontal piping of the Thermal mass must be generous, up to
3Xs the CSAs of the rest of the build! Remember to subtract 5' of distance your hot exhaust gases can flow for every elbow or 'T' !

Do ALL of those things and you should have very few future problems with your Rocket, remember Your hands will create the equivalent of a Custom built
Masonry heater costing tens of thousands of dollars ! Your sweat equity is what makes the difference, bringing an extremely affordable, safe, and highly
efficient Mass Heater into your home, take your time and do it right, soon you too will be on these pages helping other future Rocketeers build their dream
Rockets ! For the Craft ! Big AL
 
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