120 or 240 Dust Collector?

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Forum topic by BigMig posted 12-27-2012 02:44 PM 2394 views 0 times favorited 8 replies Add to Favorites Watch
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546 posts in 3581 days

12-27-2012 02:44 PM

Topic tags/keywords: dust dust collection cfm awg shop vac

Here’s the scenario:

I have a 240 circuit that is only used by my tablesaw – but the curcuit is 20 Amp. I ran the wire and added the circuit for the saw myself. The saw draws 13A running.

I am currently using a shop vac for dust collection and it’s not adequate. So I’m considering two different new dust collectors – A 1.5HP unit (120 V) – rated at 1250 CFM that draws 9 Amp running – and a 2 HP (240) unit that draws 1500 CFM. Both dust collectors have 1 micron pleated filters, and are similar otherwise – similar height, footprint, etc.

The 240 unit costs about $50 more and I’d have the added cost of 50 feet of 10 gauge wire and a new breaker. Is this added cost worth the gain of 250 CFM?

I’m in a basement (hobbyist) shop and I’ll be attaching the dust collector to each machine as I work – NOT running hard dustwork for dust collection. Mostly will be used for tablesaw, router table saw, chop saw (rarely).

Which option seems best? Are there considerations I haven’t thought of?

-- Mike from Lansdowne, PA

8 replies so far

View knotscott's profile


8406 posts in 4344 days

#1 posted 12-27-2012 02:53 PM

It kinda of depends on if the 250 CFM is real. You didn’t mention brands or model numbers, but not all DC’s are created equal, and not all CFM ratings are measured in the same way you’ll use them (that’s a polite way of saying some exaggerate the numbers). Impeller size is a huge factor in the actual CFM. If the impeller sizes are much different, the larger impeller will usually have more CFM. If the 1250 and the 1500 CFM ratings are accurate, I’m not sure if you’ll notice much, but if the 1250 is really a smaller number that’s not adequate for the task, and the 1500 is really a smaller number that is still adequate, then you’ll notice.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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110 posts in 3659 days

#2 posted 12-27-2012 02:59 PM

I just picked up a used Powermatic Model 75, which is a 3hp DC. I always prefer going larger or buying as much as I can, but have to say that a 3HP DC is much louder than I was expecting it to be. It sure does suck, but it’s loud enough that ear protection is a must.

-- It is better to keep your mouth shut and appear stupid than to open it and remove all doubt.

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546 posts in 3581 days

#3 posted 12-27-2012 03:12 PM

Thanks for the follow up question.

Both units are from Penn State Industries – 240 unit DC2000B (12” impeller) and the 120 unit is model # DC2V3CF – has an 11” impeller

-- Mike from Lansdowne, PA

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8406 posts in 4344 days

#4 posted 12-27-2012 04:06 PM

PSI has a reputation for using honest CFM ratings, so they’re likely close to real. Even 1250 is sufficient for most tasks, so I’d guess that you wouldn’t notice a huge difference. They may tell you otherwise, and it’s worth asking their opinion. Never hurts to have a little extra oomph though.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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Fred Hargis

6727 posts in 3461 days

#5 posted 12-27-2012 04:35 PM

I’d go for the PSI 2000 unit, the extra cost is insignificant. I built my first cyclone and powered it with a PSI DC250 (forerunner to the 2000). Used it for over seven years before I changed to a commercially made one.

-- Our village hasn't lost it's idiot, he was elected to congress.

View toolie's profile


2200 posts in 3596 days

#6 posted 12-28-2012 01:21 AM

bigmig…..FTR, it appears the 120V DC2V3CF draws 11A. the 220V DC2000B draws 9A.

i’d look for something else. my delta 50-850 provides 1200 CFM and draws only 6A in it’s 220V configuration. i can run a 3hp unisaw and the 50-850 on the same single 20A 220V circuit.

-- there's a solution to every just have to be willing to find it.

View GT350's profile


382 posts in 2949 days

#7 posted 12-28-2012 01:30 AM

Sometimes bigger is not always better. Several years ago I built the cyclone dust collector in Wood Magazine and it works great. I did a little creative work with the hose that goes to the filter and it is pretty quiet. I can still hear my tv or music over it. My neighbor saw it and stepped up 1/2 horsepower more, hers is so loud that she really needs ear protection so I don’t think she uses it near as much.

View History's profile


399 posts in 2949 days

#8 posted 12-28-2012 01:39 AM

In a portable 1 1/2 hp dust collector, the Delta 50-760 is hard to beat. It’s design allows you to add an onboard separator to it. It can be run on 120 v or 240 v. The only downside is that if you want to run it on 240 v you’
ll have to change the switch which Delta wants a whopping $35 for. When I bought a 50-760 I complained to Delta that a machine that has a 120 v / 240 v motor should come with a 120 v / 240 v switch, and with no arguement they sent me the switch. I now run it on 240 V.

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