Air Cleaner

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Project by tmiller posted 05-14-2009 09:16 AM 6753 views 17 times favorited 14 comments Add to Favorites Watch

It is about a 12”x16”x20”. The on/off switch is a 1 hour timer. Not only can I set the timer and then close up the shop but when the timer clicks off it is a good reminder of how long I have been in my shop. Seems like I burn through a couple of hours in no time.

Unintentionally I mounted it right by the light and it keeps down the bugs at night by blowing them right out the shop doors. The motor on this is pretty powerful. I used 2 filters on fine one course (blue/washable). The filters are in need of cleaning. I usually just blow them out with my compressor.


14 comments so far

View bowyer's profile


340 posts in 4895 days

#1 posted 05-14-2009 01:56 PM

What type of blower did you use?

-- If at first you don't succeed...Don't try skydiving

View lew's profile


13547 posts in 5255 days

#2 posted 05-14-2009 02:42 PM

Nice Idea!

Excellent location, wish I had your high ceilings.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View McLeanVA's profile


493 posts in 4933 days

#3 posted 05-14-2009 03:18 PM

Would a fan work for something like this or is it not powerful enough? Like bowyer I’d love to know what sort of blower you used? Any fear of it getting too hot inside that box?

Thanks, and great idea/execution.

-- Measure, cut, curse, repeat.

View SST's profile


790 posts in 5694 days

#4 posted 05-14-2009 03:32 PM

Great idea with the timer. I think I’ll add that to the one I built a while back. I like the 2 filter idea, too.

For the guys asking what type fan, an old furnace motor & squirrel cage fan combination works well for these units, and they are often free for the asking from heating & cooling contractors who pull them out to install new units. -SST

-- Accuracy is not in your power tool, it's in you

View dusty2's profile


323 posts in 4928 days

#5 posted 05-14-2009 04:00 PM

I thought I had a free one to use for this project. It came from my own air exchanger. How disappointed I was when I got ready to start the project. It is 220vac. I don’t have 220 in the shop.

Neat project and a good idea. We should probably all do this sort of thing in our shops rather than breathe that dusty air.

-- Making Sawdust Safely

View a1Jim's profile


118334 posts in 5076 days

#6 posted 05-14-2009 05:22 PM

good Job T
Hey Guys when I built one I had two old bath room fans that I mounted side by side, It worked but not as well as my grizzly that I bought latter.


View tmiller's profile


103 posts in 4812 days

#7 posted 05-14-2009 05:40 PM

I used one of those squirrel cage fans.

Totally agree with Shopsmithtom about where to get one of these or if you search craigslist long enough you will find someone tossing one. You could also try searching craigs for a heating & cooling contractor and them shoot then an email asking if they have any. I’m kind of a craigs addict.

I did see an interesting article online as I was researching this project. It was about how fast air is recycled in a room based on the dimensions of the squirrel cage. They come in many sizes and the bigger fan the faster it recycles the air. I want to say that with my size shop and my size fan the air is supposed to recycle 5-7 times an hour. I can’t quite remember but it was something like that.

McLeanVA- I have never thought about the heat issue and I have never noticed it getting hot. I guess since it turns off every hour it probably wouldn’t have the time to cause a problem


View stefang's profile


17040 posts in 4833 days

#8 posted 05-14-2009 07:34 PM

Thanks for the post TMiller. Maybe it will inspire me to build one too, I love sawdust, but not in my lungs. Dusty, you can just send me your air exchanger as I don’t have one, but I do have the 220v.

-- Mike, an American living in Norway.

View noknot's profile


548 posts in 4941 days

#9 posted 05-15-2009 02:06 AM

It wont get hot I has air movement and great idea


View Don K.'s profile

Don K.

1075 posts in 4826 days

#10 posted 05-19-2009 06:21 AM

agree with the heat and air shop for the fans. I went to my local heat and air place aftre seeing another shop made filter here. asked if they had any. He asked how many I wanted and how big…told him two…(Made one for the ceiling…planning on a down draft table or another filter on wheels to move around) he walked in his shop…and in two min. brought me two that looked almost new…no charge.

Said they throw dozens of them a month away and wished more people wanted them.

-- Don S.E. OK

View woodspar's profile


710 posts in 5599 days

#11 posted 05-19-2009 06:36 AM

Thanks for the pics.

-- John

View TheLandYacht's profile


32 posts in 4736 days

#12 posted 07-15-2009 10:43 PM

Wouldn’t it be better to turn it around so it sucks the bugs into the filter & blows filtered air in your face? (assuming it gets as hot there as it does here…it’s 102 already & barely halfway through the afternoon)

View Gene47's profile


74 posts in 4826 days

#13 posted 10-13-2009 09:05 PM

Greetings & Salutations,

I made mine with a blower squirrel cage and used some plans that I found in Shop Notes.

It has a sliding door on the bottome to change the filters which have 2 on the intake side of the blower and one on the exhaust side.

When its time to change filters I throw the first one on the intake side away and move the other 2 forward and put the new one on the exhaust side.

I have it posted on in my projects if you care to look.

-- Gene Miller - it only took me 3 days 9 hours and 28 minutes to get that top flat!

View Beanboy1's profile


5 posts in 4386 days

#14 posted 04-14-2011 07:05 PM

Neat idea! I like the timer too!

-- Mark (Beanboy1)

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