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HEPA dust collection in train room

Ed WalshEd WalshOGR Forum Member

I have a 20'x20'  building that now serves as my train room.  It used to be my woodworking shop. When I used it for woodworking I make a ambient dust collector using a furnace fan/motor unit.  I made it with 2 intake filters and 1 outtake filter ( from plans I saw years ago ).   Worked pretty well clearing dust in the air.  When I redid the room I took it down with the intention of improving some things on it.  Never put it back up.

Now that it is a train room, dust collection is an issue that I need to get a handle on.    I was thinking about modifying the unit I made to accept A HEPA filter.  What I don't know is what filters would I actually need.  As I understand I would put the HEPA filter on the outtake side of the blower and also put a filter on the intake side to collect the bigger particles.  My question is what type of intake filter should I use.  Also, would it be necessary to put in a carbon type filter.  

I would appreciate any help or suggestions anyone might have.  The furnace blower unit is a good one and is powerful enough to handle pushing enough air thru a pre- filter and then a HEPA.   

I am hoping that I can just modify the "box" housing the blower unit to use a HEPA and a pre-filter.

Thanks,

Ed

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rtr12rtr12OGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I think something like a MERV 8 to 13 or so pleated filter would be adequate for a train room. You could use similar setups of those as you did with your woodworking filter setup and they would most likely be available in the same sizes. I think a MERV 13 filters out some pretty small particles, like down into the tenths of microns. Probably a chart somewhere on the internet showing the actual ratings. Not sure the big box stores have them with as high as a 13 rating though?

Ed WalshEd WalshOGR Forum Member

I did as you suggested and looked up the MERV numbers and a 13 captures 98% of .30 - 1 sized particles.  I think that would be plenty sufficient for the train room. Could probably even go a tad lower MERV.    And they do come in the size the slots were made for in the box I built.   So with just a little modification I should be in good shape.  

Considering how bad the dust is now even a slight improvement would seem huge.

Thank you for the suggestion.

Ed

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