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Rocket or waste oil?

 
                                      
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Hi all,
I've been researching and considering different (better) options for a shop heater. I'm new here and thought I'd ask "those in the know".
I like waste oil because the fuel is free, it's hot, no smoke or smell and it's cheap and quick to build. On the flip-side, they're very noisy, dirty oil can clog, and there is potential to use more oil than I can find.
The rocket is also cheap to build and cheap to operate (I have plenty of surplus wood, now). I think it would make enough heat for my 30x40 shop and would probably take less space. I like the idea of burning scrap wood without having to cut it down to "wood-stove size". I have several potential "tanks" (water heater, 250 gal oil tank, 55 gal drum, etc). The down-side: I think the rocket would be a pain to light and building may take more trial and error. Also, I have some large chunks I'd have to split the snot out of, to make it fit.
Now, what does everyone else have to say. Am I way off base? Is there more I should know about either heater?
 
                    
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By waste oil do you mean motor oil?  Does burning the waste oil, with the additives have any potential harmful effects?

I have no idea, just wonder.
 
pollinator
Posts: 2103
Location: Oakland, CA
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Waste oil might potentially be recycled, or (if it's vegetable oil) up-cycled into motor fuel.

Liquid fuels can, in some circumstances, be more of a fire hazard.
 
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Do both.  I've retro-fitted drip burners into conventional wood stoves and it worked great. You start the fire with wood and then open a needle valve to start the oil drip. I used veggie oil that was too hydrogenated to easily make biodiesel from. The drip burner is gravity fed and designed after a ceramic kiln burner with stepped plates.
 
steward
Posts: 3490
Location: woodland, washington
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Ernie has mentioned that he used an oil drip in a rocket stove.  haven't heard any more detail than that.
 
no wonder he is so sad, he hasn't seen this tiny ad:
Dave Burton's Boot Adventures at Wheaton Labs and Basecamp
https://permies.com/t/119676/permaculture-projects/Dave-Burton-Boot-Adventures-Wheaton
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