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Filters that will remove down to 1 or 0.5 microns while capable of meeting the flow requirements generated by a HVAC blower are also very expensive.

I suggest starting here to understand the dangers of fine particles and what it takes to remove them for the work shop SAFELY.

The last thing you want to do is blow the small particles back into the air, over and over again.
 

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I remember when you could pick up a blower for free or maybe $5. I think scrap prices having increased over time may have put an end to that. The comment about the filter is very true, on the plus side, most furnace blowers are three speed and the lowest speed should move close to the air that a manufactured unit would move on high.
 

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I was curious and just searched Craigslist in my area (Cincinnati) for "blower motor" and there are a few choices for $30-$50. Have you tried Craigslist? I'm not sure if that qualifies as a reasonable cost for you.
 

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Discussion Starter · #7 ·
Thanks for all the replies, I have checked craigslist in my area . I have found one on Amazon which normally is $90.00 , there is a slightly used one for $53.87. My problem is, is it good enough and will it actually pull most of the dust out of the air , using 3 filters. When it is nice out I work outside, but when it is cold or raining I close the garage door. Last winter everything was coated with dust created while doing woodworking. I only occasionally work on any project depending on how I feel. Right now I am in the midst of making 8 sets of outdoor shutters, which is going to create a whole lot of dust with the door closed. The air cleaners they sell are far to pricey for my budget. I had thought of the box fan type, but I much rather have something with more power, which I hope would clean the air from the dust particles more efficiently
 

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So what is the flow of the filters you are planning on using and what percentage of material are they capable of removing? How far down do they filter to? How much surface area is being provided by the filter? How long can you use it before it clogs or needs to cleaned\replaced?

I am amazed at how many "great ideas" I see slapped together on this forum with absolutely NO research done on what is required to accomplish the task, even when presented with the material required to comprehend the dangers of fine particles.

Lots of experimentation going on with little or no appreciation for the danger it poses to ones long term health.
 
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