My new shop made air filter!

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Project by RetiredCoastie posted 11-28-2009 03:49 AM 15311 views 61 times favorited 16 comments Add to Favorites Watch

The air filter was made from a set of plans from Woodsmith magazine Vol. 16 No. 95. The carcass is made from birch plywood and scrap hardwood rails to support the filters. The heart of the filter is an 850 CFM furnace blower that I got for free from an HVAC company. It’s a 4 speed blower but I could only find a 3 speed switch.

In the event I need to service or clean the blower I mounted it to a plywood plate that’s attached to an internal frame with machine screws. The filters are 16”X20”X1”, two inlet and one outlet HEPA filter. This thing really moves a lot of air. On high it does make a fair amount of noise but not to an annoying level. The two lower speeds work very well.

The changes to the Woodsmith plan was the dimension I chose is bigger, the switch is a pull chain multi speed switch that’s rated at 6 AMP, and the mounting of the blower is with two .040 thick stainless brackets that I fabricated, and the plywood adapter plate is held in with machine screws and “T” nuts.

Total cost $48.55

After I’m done with Christmas presents I’ll add some edge banding to the plywood and probably paint or stain the outside of the case, and I’ll replace the switch with a 4 speed switch with a timer and remote that a friend is supplying.

Thanks for viewing!

-- Proud Supporter of Homes For Our Troops

16 comments so far

View hairy's profile


2204 posts in 2571 days

#1 posted 11-28-2009 03:56 AM

Nice work! There’s no such thing as too much dust control.

-- on Wednesday's I go shopping, and have buttered scones for tea...

View Joe Weaver's profile

Joe Weaver

461 posts in 2725 days

#2 posted 11-28-2009 04:04 AM

looks great

-- Joe, Ga

View OhValleyWoodandWool's profile


969 posts in 2159 days

#3 posted 11-28-2009 04:19 AM

very nice

-- "All you need in this life is ignorance and confidence, and then Success is sure." Mark Twain

View TopamaxSurvivor's profile


16449 posts in 2715 days

#4 posted 11-28-2009 06:06 AM

great build:-))

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View BTKS's profile


1983 posts in 2503 days

#5 posted 11-28-2009 07:17 AM

A Cadillac of cleaners. Good job. BTKS

-- "Man's ingenuity has outrun his intelligence" (Joseph Wood Krutch)

View ChesapeakeBob's profile


361 posts in 2522 days

#6 posted 11-28-2009 01:35 PM

Great job! I have saved it as a favorite and it has also been added to my “add to shop list.”

Thanks for posting!


-- Chesapeake Bob, Southern Maryland

View Bureaucrat's profile


18336 posts in 2691 days

#7 posted 11-28-2009 07:05 PM

thanks for the post and all the pics. I’ve saved it as “air scrubber” in my favorites. Looks to be really effective.

-- Gary D. Stoughton, WI

View RetiredCoastie's profile


999 posts in 2222 days

#8 posted 11-28-2009 07:53 PM

Thanks for viewing and for the comments. It works really well when you remove the plastic from the filter before turning it on.

-- Proud Supporter of Homes For Our Troops

View woodenships's profile


33 posts in 2208 days

#9 posted 11-28-2009 08:16 PM

Great work… should actually fire proof the inside wood area….I think you can get brush on clear or black from HD or any good paint supplier.

-- "Safety is habit you start and always keep!"

View a1Jim's profile


113725 posts in 2616 days

#10 posted 11-29-2009 04:12 AM

great job

-- Custom furniture

View drfixit's profile


318 posts in 2183 days

#11 posted 11-29-2009 04:18 AM

ok, now I am going to have to build one, even though I have one hanging. Very nice workmanship!

-- I GIVE UP!!!! I've cut this @!&*!% board 3 times.... its still too short!

View bigike's profile


4042 posts in 2327 days

#12 posted 11-29-2009 04:34 AM

sweet deal much better than paying $200-$400 for a name brand one.

-- Ike, Big Daddies Woodshop,

View Mitch Neal's profile

Mitch Neal

19 posts in 2167 days

#13 posted 11-30-2009 04:19 AM

Nice clean wiring job. Thanks for the pics.

-- Its not your goal, its the path you take to achieve that goal that matters.

View MikeOB's profile


89 posts in 2160 days

#14 posted 11-30-2009 10:26 PM

Very nice….I need to make one of those as soon as my workshop is ready to go…

-- Mike, Portage, WI

View mathom7's profile


69 posts in 1950 days

#15 posted 12-22-2010 06:41 AM

Retired, looks great. Can you post the info on the timer and remote unit you end up getting?

That is what is pushing me toward a commercial version, the ease of the remote and the ability to run it on high right after I leave the shop.

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