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heat from rocket chimney

 
Posts: 70
Location: New Jersey
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I have a one story house with a large open basement. I was thinking about building a large rocket mass heater in the center of the basment. However, the conventional heating ducts hang from the rafters right over the place that I want to put the rocket mass heater. So, I was thinking....can I just connect the exhaust from the rocket heater to the heating ducts and have that excess hot air travel through the ducts into the upstairs for additional heat up there? Or is that not wise? Does the exhaust absolutely have to travel out of the house? I attached a photo...the mass heater will go right where the ping pong table is. You can see the heating ducts hanging from the rafters just above it.
image.jpg
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gardener
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Adam Buchler wrote:... So, I was thinking....can I just connect the exhaust from the rocket heater to the heating ducts and have that excess hot air travel through the ducts into the upstairs for additional heat up there? Or is that not wise? Does the exhaust absolutely have to travel out of the house?



That is "exhaust" from combustion, not "hot air." Exhaust from combustion includes much more CO2 than clean air, at times CO (the infamous carbon monoxide that suicides sit and breathe in their garages until they pass out and die rather quickly), and despite the rocket stove's efficiency, some other products of combustion like smoke etc. Especially during start up and odd events, when there may be additional more carbon monoxide and/or smoke-type stuff.

(!)
 
pollinator
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Adam Bucher : Please Don't even consider trying to run your Rockets exhaust though the Heating/cooling ductwork of your House !

A rocket stove burns at very freaky high temperatures, and ideally should produce only that heat, CO2, and Water vapor !

Unfortunately as each rocket built is a One- of-a-Kind -NO ONE- can promise that your rocket will not produce Carbon Monoxide which
is a clear and Odorless Gas that will kill you !

You may remember the movie Apollo 13 - The movie that gave us the MEME - " Houston we have a Problem"! After the mid-flight Accident
The Astronauts had to create a Carbon Dioxide Scrubber to reduce High levels of Carbon Dioxide before That gas reached fatal amounts !

For the Good of the Crafts ! Big AL

 
Adam Buchler
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Location: New Jersey
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Ok so no exhaust into the house. What if I ran the exhaust duct up through the floor, into the bedroom, through the bedroom ceiling , and out through the roof? The bedroom is the coldest room in the house. Would that section of exhaust running through the room give off any significant heat? It would mean having about 50 ft of exhaust duct. Not sure if thats a problem. Maybe I could even cob the section of exhaust in the bedroom to act as a small thermal mass? So basically the duct would run from the ping pong table up to the ceiling and over the the far corner of the basemwnt(where the wine barrel is proped up on cinder block) then through the basement ceiling, into the bedroom corner(pic attached) and out through the bedroom ceiling, then out the roof. Possible??? Will that much exhaust duct mess with the convention of the heater?
image.jpg
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The vertical run counts as chimney, not duct, for length capacity purposes. Having the chimney uninsulated and wrapped in thermal mass would have to be factored into the total heat extraction, though, so as not to leave the exhaust so cool it won't draft. It would be better for both draft and heating value to have the chimney run up near the center of the house, not at an outside corner.

A double bell like the one Max linked to (or simpler for a frst-time builder) might be better at controlling the heat extraction and storage.
 
Montana has cold dark nights. Perfect for the heat from incandescent light. Tiny ad:
Perennial Vegetables: How to Use Them to Save Time and Energy
https://permies.com/t/96921/Planting-Perennial-Vegetables-Homestead
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