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Homemade Air Cleaner

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Project by HickoryHill posted 01-19-2007 03:36 PM 41511 views 140 times favorited 36 comments Add to Favorites Watch

Here is my homemade air cleaner that I built for my shop. I used 3 High Volume Comair Rotron fans rated at 340cfm each. I have them wired to a 60 min dial style timer which is then fed into a 2 switch unit that allows me to turn 1, 2 or all 3 fans on. I have no idea how to tell how many times an hour it recycles the air in the shop, but I know it moves a lot of air and traps a lot (A LOT) of particles in the air.

The size was determined by looking at the 3 fans side-by-side and what filters were available. To keep the height of the case to a minimum, I ended up ordering filters from Filters Now. The unit has locations for 2 pre-fan filters and a post fan filter. In hind sight, I should of made it a little taller to use more readily available filters.

-- Jim, Michigan





36 comments so far

View Obi's profile

Obi

2213 posts in 2988 days


#1 posted 01-19-2007 04:03 PM

Nice job, thanks for the pictures

View MsDebbieP's profile

MsDebbieP

18615 posts in 2911 days


#2 posted 01-19-2007 04:10 PM

pretty ingenious. Where there’s a will, there’s a way!

-- ~ Debbie, Canada (https://www.facebook.com/DebbiePribeleENJOConsultant)

View rookster's profile

rookster

67 posts in 2901 days


#3 posted 01-19-2007 10:11 PM

Love it. I need to make one of these for my shop. What was the total damage for that unit?

-- Rookster, (http://www.robertkarl.org/woodworkingblog/)

View HickoryHill's profile

HickoryHill

177 posts in 2897 days


#4 posted 01-19-2007 11:22 PM

How much? Hmmm…...

Wood I had left over, but the ply wood would be less than a 4×8 sheet. I think the fans were around $20 each. I had to purchase the plug adapters with wires for the fans, so I would guess $25-$30 for those total. Maybe $10-$15 for the switch and timer.

So, without accounting for the filters, probably by the time I bought the plywood new and the misc. fasteners to boot, somewhere around $150+/-.

I’ll have to see if I have the link to the fans in my computer at home.

-- Jim, Michigan

View HickoryHill's profile

HickoryHill

177 posts in 2897 days


#5 posted 01-19-2007 11:41 PM

Ok, here is a link to where I bought the fans. Good guys to deal with. One of the 3 fans they sent me was loud, like something was hitting inside the fan. They sent me a new one free and didn’t ask for the old one.

About the 4 item down… TN3A2ROTRON TARZAN FAN, 6.8” square X 4” D plastic frame fan moves 340 CFM of air from 115 V 50-60 Hz 85 watt input; 5 lbs shipping. used-clean,
$19.95 each
http://www.fairradio.com/catalog.php?mode=view&categoryid=200

-- Jim, Michigan

View Don's profile

Don

2603 posts in 2928 days


#6 posted 01-20-2007 12:18 AM

Looks like a well made Air Cleaner.

Is there any possibility that the motors will clog up with wood dust and die? And is there any possibility of the electicl components igniting the wood dust, i.e. fire hazard?

I guess both questions relate to how much of the dust is filtered out of the air, or how much gets through.

-- CanuckDon "I just love small wooden boxes!" http://www.dpb-photos.com/

View HickoryHill's profile

HickoryHill

177 posts in 2897 days


#7 posted 01-20-2007 02:40 AM

I think the filter catches a lot, but only time will tell on the clogging. I don’t think I need to worry about the explosion hazard. They are axial fans which are brushless, and I’ve been using smaller versions in my airbrush booth for years (using lacquer paints)

-- Jim, Michigan

View Don's profile

Don

2603 posts in 2928 days


#8 posted 01-20-2007 03:02 AM

Of course, I would probably make sense to bow out the motor area when changing the filters. If you spray finish you have a compressor. Thanks for the idea.

-- CanuckDon "I just love small wooden boxes!" http://www.dpb-photos.com/

View Obi's profile

Obi

2213 posts in 2988 days


#9 posted 01-20-2007 08:24 AM

O.K. I was thinking about installing a filter before the fans, and when it gets dirty, you can replace them of clean them or whatever it is you do. That way the fans stay free of paint and sawdust.

View Dick, & Barb Cain's profile

Dick, & Barb Cain

8693 posts in 3050 days


#10 posted 01-22-2007 11:19 PM

I was wondering how many microns your pleated filter stops. I have a Jet air cleaner that filters down to 1 Micron. I’m not sure if your pleated filter is that affective. mine has a pleated filter plus a bag to catch what the pleated filter misses, & the bag catches an awful lot of dust. They say the dust below 5 microns causes the most danger to the lungs.
I like your fan system though. It should be much quieter than mine. I have a composting toilet that has similar fans, & they’re real quiet. I don’t think you should have any clogging problems either.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN. http://www.woodcarvingillustrated.com/gallery/member.php?uid=3627&protype=1

View HickoryHill's profile

HickoryHill

177 posts in 2897 days


#11 posted 01-23-2007 12:46 AM

I’m not sure the micron rating on the filters, but there are 2 filters running, both rated at 11 merv. Whatever that merv translates into?

EDIT: Looks like with Merv 11, the efficiency rating on particles 1 to 3 microns is probably 65%-80%. Would have to get something that was rated at 16 merv.

EDIT: Looks like I should of built the unit to 12” high, then I could of got some bag filters from Penn State. Anyone know where to look for some bag filters, besides Penn State?

-- Jim, Michigan

View Crab's profile

Crab

1 post in 2510 days


#12 posted 02-10-2008 03:14 AM

I am just curious about the ease of changing the filters?

View FrankA's profile

FrankA

139 posts in 2530 days


#13 posted 02-10-2008 03:31 AM

I glad this post came back around. Looks like a great project, I see it’s about a year old and I was wondering how this unit has been woeking out for you. It looks like something I will have to put on the project list.

-- Frank Auge---Nichols NY----"My opinion is neither copyrighted nor trademarked, but it is price competitive."

View HickoryHill's profile

HickoryHill

177 posts in 2897 days


#14 posted 02-10-2008 03:50 AM

Crab…

It’s really easy to change. Just lift up the door and swap out the filters. I’m 6’3” so it’s easy to reach for me…....other than that.

FrankA…

I haven’t used to much in my new space, haven’t built a lot since the big “D”. But from what I used it, it trapped a ton of particles. I remember once cutting some MDF (a small amount) and forgot to have it running while cutting. It didn’t take long to clear the room, granted it wasn’t a big room, but still didn’t take long. You can watch the dust just pile up. I was running it one of those cheap fiberglass filters first, then a pleated filter second. Even the cheap blue filter was catching a ton.

-- Jim, Michigan

View rikkor's profile

rikkor

11295 posts in 2625 days


#15 posted 02-10-2008 11:46 AM

I am glad this came out of the archives, too. This is a good project.

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