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Safe operation in a workshop?  RSS feed

 
Posts: 26
Location: Vermont, USA
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Anyone know if it is safe to operate a rocket mass heater in a workshop where power tools will be creating sawdust?  At normal levels of sawdust created by table saws, skill saws, etc, is there risk of an explosion?  Other safety concerns?  Thanks.
 
Posts: 144
Location: Sacramento, CA
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I done have the math answer of the density of sawdust that will ignite but I can tell you if it is dense enough to ignite, you are going to have one hell of a lung problem when you get older.

In other words, you shouldn't be letting your woodshop get that dusty as that is a killer, wooddust at that level definitely can cause health problems even if you are just using pine and domestic hardwoods.
 
Posts: 64
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Seems as though it should be ok, lots of shops are heated with plain woodstoves that have an open flame and significant surface temps.  Spray would be a out of the question on a concurrent basis, but then an advantage of an RMH is you can get a lot heat out of the unit when the fire has burned out.  I would like an RMH for my shop, and the biggest issue I have is that my shop doesn't need a sofa, so a design that is more workbench shaped would be more to my liking.
 
gardener
Posts: 2713
Location: Southern alps, on the French side of the french /italian border 5000ft high Southern alpine climate.
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Well well well. Here i come.

My workshop heater is here http://donkey32.proboards.com/thread/1817/starting-build-220mm-rocket-double

No problem so far. As michael said, if it gets dusty enough to be explosive. Your lungs will be caked!

So in my workshop, i use a cyclone loosely based on Bill Pentz plans. http://billpentz.com/woodworking/cyclone/cyclone_plan.cfm

It is worth reading the whole site thoroughly.

My cyclone is a push through. As it's the easiest to use with sawdust bags. The latest addition is two nanoweb filters. With a filtering surface of 60m² .

Future plan is to make also a high volume workshop air cleaner. You know like those little ceiling mounted units.

But something proper with hepa filters or something along the lines. 

And for the whole workshop air cleaner, i will follow the solution of Mario Proulx.

http://www.mimf.com/phpbb/viewtopic.php?f=12&t=2764

You might have to register to view the aulde discussion on his workshop filtering.

Here's a few pic of the cyclone in it's curent state.
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gardener
Posts: 601
Location: +52° 1' 47.40", +4° 22' 57.80"
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forest garden trees wofati woodworking
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My three barrel tower was operated in my old workshop while running a stationary circular saw, bandsaw or planer. I used a dust extractor though like Max is doing. No explosions occured, only scorching of dust on top when the thing was run for the first time in autumn. Oh, by the way, I started my career as an apprentice in a carpentry shop with no dust extractor and small cast iron stoves for heating only, never experienced a dust explosion. Darn cold in winter I have to add...
 
Jean-Paul Calderone
Posts: 26
Location: Vermont, USA
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Thanks!  Guess I'll go ahead with this project then.
 
Watchya got in that poodle gun? Anything for me? Or this tiny ad?
Do you prefer white or black rocket ovens?
https://permies.com/t/90003/prefer-white-black-rocket-ovens
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