Help with Air Filtration Unit

  • Advertise with us

« back to Safety in the Woodworking Shop forum

Forum topic by BrandonR posted 09-30-2013 08:16 PM 1047 views 0 times favorited 4 replies Add to Favorites Watch
View BrandonR's profile


64 posts in 2471 days

09-30-2013 08:16 PM

Topic tags/keywords: tools air filter grizzly

I am looking into buying an air filtration system. I don’t know much about the topic, and was hoping for some quick help.

Quick background… I work out of a 20 by 24 two car garage. In the summer the main door is always open, but going into winter I work in there with it closed. I spend about 10 hours on the weekend out there and another 6 during week. I make and sell small stands and use lots of types of wood, walnut and exotic included. I do a lot of cutting on my table saw and lots of sanding. Get lots of particles float around after have table saw running for 20-30 minutes.

I have a DC that pulls the shavings pretty good from both my stationary sander and table saw…. I still get lots of dust in there though! I use a respirator at times, but need to more…

I am going to buy a Grizzly unit…. Here are the two…. One for 199.99 and one for 265. The one with 265 had more power at max 1044 compared to the other at 409 CFM.

Can you help me decide with my shop size if the bigger unit is worth the money, or not worth it….?

Also i have read you should have two to make it more effective, is this needed?


4 replies so far

View Fred Hargis's profile

Fred Hargis

5143 posts in 2671 days

#1 posted 09-30-2013 08:47 PM

They will both clean the air, one will do it about twice as fast as the other. I’m not sure which one you should get, but the G0572 looks like it might be a head banger if you have an 8’ ceiling. I’ll also mention (only for your consideration) that effective dust collection begins with capturing as much as possible at the source. It sounds like your system needs some upgrading. Remember, at least from a health perspective, once the air cleaner can catch the dust it’s already made it to your lungs.

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

View longgone's profile


5688 posts in 3486 days

#2 posted 09-30-2013 08:52 PM

I would definitely get the bigger one. You can never have your air too clean especially when you are quickly replenishing the clean air with fresh sawdust at a fast rate.

View crank49's profile


4032 posts in 3149 days

#3 posted 09-30-2013 09:21 PM

The larger unit on high speed will give you an air change roughly every 4.1 minutes, about 14 1/2 changes per hour. That is not bad too bad. The smaller machine will give you a change about every 10 1/2 minutes, or about 5.7 changes per hour.

I think about 6 changes per hour is the accepted minimum you should shoot for, so the small unit is right on the border.

All my calculations were based on a 9 ft ceiling. If you have a higher or lower ceiling adjust your size accordingly.

I think I would go for the larger machine and run it on a lower speed if not too dusty. That will cut down on the noise.

View brtech's profile


1049 posts in 3100 days

#4 posted 09-30-2013 10:00 PM

As with any of the low cost DCs, you have to take the numbers with a grain of salt. I compared the specs to the Rikon one I got on sale at Woodcraft. I paid $269 + shipping. The Rikon looks to be the size of the smaller Griz.
It claims 950 CFM but has a 1/4 HP motor. The Griz has a bigger impeller (looks like anyway) and claims 1044 CFM with a 1/5 HP motor. I suppose a less powerful motor with a larger impeller could generate more CFM, but I wonder which numbers are real, and which ones only suggest the real truth.

Do think about height. I had to put mine in a relatively out of the way location to not be a problem in my basement shop. With air cleaners, you want to create a circulation pattern in the room to get all the air moving through the unit, it’s less important that it be close to the dust sources.

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics