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Forum topic by daveries posted 10-02-2009 11:57 PM 3449 views 0 times favorited 6 replies Add to Favorites Watch
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daveries

6 posts in 1881 days


10-02-2009 11:57 PM

I’m going to need a inexpensive dust collection system. I’m thinking PVC, my question is how many CFM should I be looking at for a fan to filter the air. and is there a way to build an inexpensive filtration system? If so, could you shoot me a few ideas.

The basement I’ll be working in is 8000 feet, big. I will have a router, shopsmith, table saw, miter saw and misc tools. Used one at a time.


6 replies so far

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pommy

1697 posts in 2414 days


#1 posted 10-03-2009 12:29 AM

firstly Welcome to LJ’s

and i do hope that you use them one at a time LOL im in the UK but most of the guys here talk about Home depot so try there firt but i.m sure you will get alot beter ideas than i can give you but good luck and look forward to seeing some of your work

-- cut it saw it scrap it SKPE: ANDREW.CARTER69

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hairy

2098 posts in 2255 days


#2 posted 10-03-2009 12:31 AM

That’s a whopper of a basement shop. Don’t go cheap on dust collection inside the house. If I was in your shoes, I would build partition walls around the wood shop area, to help contain the dust. Dust collection is like bank accounts, no such thing as too much.

I built this for not much money.
http://lumberjocks.com/projects/15760

It helps get the airborne dust, but you really need dust collection at the source.

-- in the confusion, I mighta grabbed the gold ...

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ondablade

105 posts in 1921 days


#3 posted 10-03-2009 02:03 AM

Bill Pentz’s dust collection pages are a goldmine of information: http://billpentz.com//woodworking/cyclone/index.cfm He’s prominent on the US Felder Owner’s Group, has put so much into the topic but is not commercially oriented at all – his motivation seems to be to help others. He spent lots of money on a high spec commercial system only to suffer a life threatening reaction to wood dust – with the result he’s done years of research on the topic, and development of his system.

Bill’s basic position (all explained on his site) is that most commercial systems don’t work very well – the filtration is not good enough to catch the less than 1 micron particles that cause the health problems (your lungs can’t cope), they don’t shift either as much air as they claim or nearly enough to give effective at the machine dust collection (motors are undersized, but test conditions are manipulated to give unrealistically high numbers), and anyway you need (an effective) cyclone to prevent filters blocking in no time.

You might feel he was bullshitting except that the web is full of people who have built systems to his design and are extremely happy – one guy who installed a system in a basement in Tokyo who has no problems whatsoever. The feedback is that his cyclone design is so effective that the filters are close to being unnecessary – very little of even the fines gets through to them.

He’s associated with these guys that can sell you a very reasonably priced version of his designs: http://www.clearvuecyclones.com/ Ed Morgano is the owner, and again they are not playing it to maximise the payback.

They make the system specs, drawings and information available FOC, and will sell you specific parts like e.g. the fan impeller on its own.

I’m about to build a DIY system to his design for my shop, i’m planning to buy the metal fan impeller from Clear Vue at about $245 plus shipping, to source equivalent spec filters locally in Ireland (while not expensive to buy they are bulky and shipping trans Atlantic is too expensive), and to source a new 5hp single phase (pump type high load starting) motor for a bit over €200 to €300 over here depending on whether i go for a Chinese, or a Euro made motor. The rest is sheet metal and MDF.

Bill also has a lot to say about duct sizing and system design on his pages.

Point is it seems like a very low cost way into a very high specification system. You could be put off by the decidedly low profile of the web pages, but as far as i can tell it’s pretty sound (and more to the point honest) stuff.

Well worth a read. I found him when i smelt a rat reading the specs provided by commercial system manufacturers and started investigating the topic – i’ve some background in HVAC engineering, and they just weren’t adding up.

He’s got me sold anyway, but time will tell.

ian

-- Late awakener....

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juniorjock

1930 posts in 2488 days


#4 posted 10-03-2009 02:33 AM

8,000 square feet…..........???

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Dudley

742 posts in 1983 days


#5 posted 10-03-2009 03:31 AM

He must mean 800.

-- Dudley Young USN Retired. Sebastian, Fl.

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TopamaxSurvivor

15024 posts in 2398 days


#6 posted 10-03-2009 05:28 AM

If he’s lucky, he meant 80,000 :-))

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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