Paint Spray Booth
been planning on building this for several years now, and I'm finally
getting around to doing it. I drew up the plans about a year ago and
spent quite some time trying to locate a suitable Dayton squirrel
cage blower fan for quite some time. I wanted to save money, so I
searched eBay for a long time. Eventually I won an auction for the
one I wanted; model 4C444 (350
CFM). Trying to mount the blower to the box proved a challenge, but
with the help of some of the members of my train club I was able to
get it going. Here's some photos from the construction process.
The box is constructed from 3/8" & 1/2" plywood screwed
to 3/4"x 1.5" cleats. The blower hangs from the top piece.
construction almost completed, here I'm test fitting the back. Nice
of the box.
the Dayton blower.
fitting the blower into the slot in the top.
carefully measuring, I cut the vent hole in the back of the box. Luckily
it matched up perfectly.
the wiring for the blower. The blower has 2 black wires in the wiring
box on the blower motor. There is a green Ground screw which mounts
to the blower housing and a small hole in the box on the blower motor
to feed the ground wire through. I arbitrarily hooked up the wires
to the two black wires and the fan worked fine.
for a long time online trying to find out how to mount these Dayton
blowers and could find very little info. Eventually I took the blower
to my train club and a member helped me with this design. The blower
is designed to "hang" from the exhaust flange. It's the
most robustly designed piece of the unit. There are 4 1/4" holes
for bolting the blower to the mount. I chose to hang the blower off
the back of the box flush up against the back wall. This way, the
intake is as close as possible to the spray booth area.
completed. Some have inquired as to how loud the blower is when turned
on. The blower is actually very very quiet. It's about as loud as
a kitchen stove hood fan. Most of the noise is the "woosh"
of the air passing through the unit. I was pleasantly surprised.
view of the blower installed.
I finished the exhaust adapter for the blower. From a 1/4" piece
of plywood I cut out a hole slightly larger than the square exhaust
of the blower. I put strips of vinyl insulation around the blower
exhaust port. Drilled the holes for the 1/4" mounting bolts and
threaded the plate on. Everything was tightened down. Then I used
some scrap metal L brackets (for the drop ceiling) which I cut and
drilled to mount the 6" to 4" reducer to the top plate.
Everything was screwed together and now I'm going to seal it with
some silicone caulk.
is the plate which will go in the window when I'm using the spray
booth. This is the inside side. The 4" 90° piece will mount
to the exhaust port here. It's constructed of 3/8" plywood.
side with louvered vent.
it is mounted in the window.
is the nearly completed booth in place in the workshop. I still
need to buy/install the lights and all the electric wiring which
will be mounted on the right side.
vent in place.
Filter is held in place with dowels which are threaded through the
showing dowels. A rubber band holds them from moving.