Air cleaner based on Bill Pentz design

This is my air cleaner based on a Bill Pentz design

http://billpentz.com/woodworking/cyc...ir_cleaner.cfm


I have modified the design for stability by adding the four threaded rods which have acorns on their top ends and placed the unit on castors

I have placed a mesh above the fan for added safety and the purpose of the orange ribbon is to provide a visible indicator when the fan is running

The mesh is held in place with red cable ties and the perimeter of the mesh is a metal seal off a plastic drum

The two wooden shelves are braced for added strength


The fan is 230 watts and moves 11 cubic feet per second perhaps a little overkill but I was given the fan

If you decide to build a similar air cleaner based on the images below it is easier to assemble the unit by placing the acorn washer on the threaded rods first then tighening the nuts below the base

To clean the flter I turn the fan upside down reassmble the unit and run it outside

I apolozise for the images not being the correct way up I was unable to rotate them

regards Brian



Attachment 373573Attachment 373572Attachment 373571Attachment 373570Attachment 373569

It certainly looks like it can clean som air. What kind of filter are you using ?

I live in the United Kingdom I was given the Ventaxi fan which came out of a Rolss Royce factory in the Uk

The filter I purchaced off e bay for $30

This is the link for the filter



http://www2.donaldson.com/torit/en-u...ebbrochure.pdf


regards Brian

Nice looking machine. An 11 ft^3/second blower is not overkill. That is 660cfm. Lots of the factory made suspended woodworking dust filters will do 1000cfm or more. I would say you have it about right.

If I understand it right, the filter can only take particles down to 10 micron ? Im no expert, but I think I read somewhere that the filter needs to be able to filtrate down to 1-5 micron

Lasse

Please see chart on page 3

http://www2.donaldson.com/torit/en-u...ebbrochure.pdf

regards Brian

Hi Art
The reason why I think it is over kill is I have single car garage with a total volume of 1600 cubic feet

( the house was built in the 1957 the garage is 8ft by 8ft and 25ft deep)

Therefore the fan filters the air the garage every 145 seconds or almost 25 times per hour

Other

I did find the air cleaner very useful when decorating, I had to sand flat the plaster on a large hole I had filled

regards Brian

Just keep in mind that a filter like that is extracting fine dust at the same time you lungs are if you are in the room. You need all the dust filtration power you can get. Any system that captures dust anywhere besides the source is capturing it too late for best results. Also, I think your assumption about how often the air is recirculated is optimistic. It is more likely some of the air is being filtered at much more than 25 times an hour and some much less so. That is another reason to have a powerful fan to stir up the stale and dust laden air. In my shop, the heater and filtration systems are placed so as to move the air in a circular fashion and maximize circulation.

Quote:

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Originally Posted by Brian Deakin

This is my air cleaner based on a Bill Pentz design

http://billpentz.com/woodworking/cyc...ir_cleaner.cfm

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His eventual solution involved removing carpets and replacing them with tile. Anyone who has pulled up old carpets will understand why.