My new shop made air filter!

  • Advertise with us
Project by RetiredCoastie posted 1734 days ago 8721 views 57 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 (online now)


2008 posts in 2164 days

#1 posted 1734 days ago

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

-- the last of Barret's Privateers...

View Joe Weaver's profile

Joe Weaver

401 posts in 2318 days

#2 posted 1734 days ago

looks great

-- Joe, Ga

View OhValleyWoodandWool's profile


969 posts in 1752 days

#3 posted 1734 days ago

very nice

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

View TopamaxSurvivor's profile


14725 posts in 2308 days

#4 posted 1734 days ago

great build:-))

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

View BTKS's profile


1967 posts in 2096 days

#5 posted 1734 days ago

A Cadillac of cleaners. Good job. BTKS

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

View ChesapeakeBob's profile


341 posts in 2115 days

#6 posted 1734 days ago

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 gjd's profile


18326 posts in 2284 days

#7 posted 1733 days ago

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

-- gjd Southcentral Wisconsin

View RetiredCoastie's profile


999 posts in 1815 days

#8 posted 1733 days ago

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 1801 days

#9 posted 1733 days ago

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


112015 posts in 2209 days

#10 posted 1733 days ago

great job

-- Custom furniture

View drfixit's profile


318 posts in 1776 days

#11 posted 1733 days ago

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


4031 posts in 1920 days

#12 posted 1733 days ago

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 1760 days

#13 posted 1732 days ago

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 1753 days

#14 posted 1731 days ago

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 1543 days

#15 posted 1345 days ago

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.

showing 1 through 15 of 16 comments

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

Latest Projects | Latest Blog Entries | Latest Forum Topics :: gardening showcase