If the DC is in a closed room then it needs some type of venting whether it
be back to the shop or to the outside. It's nice to be able to do both as
it sometimes gets into the lower temps here in Phoenix and if venting the DC
outside the make up air comes from outside as well. Pulling in
sub-freezing(1) air into the shop is not always a good thing!
(1) I think one day this season has it been sub-freezing but several days
where the low was in the upper 30'sF
I recently upgraded the service in my shop to100 amp. The cost
difference between 60 and 100 amp wire (which was an 85 ft run in my case)
was about $15, so definitely go 100 amp.
Putting the AC and DC in a seprate room is the way to go. I'd just
frame a few walls and insulate them. May not be sound proof, but i'll
deaden the sound considerably. You'll also need to put a vent in somewhere.
I'd recommend putting one about the same size as the return air vent in your
home. Put it in the door, wall, or wherever is convienient, just as long as
you have one. You'll never completely deaden the sound of those machines,
but just enclosing them will make a HUGE difference, so don't worry to much
about the vent negating the sound barrier. If my shop was three car and not
two, the third bay would definitely house a finishing room.
Have a good one! --dave
Another thought, Brian - I live in SO Calif where it does get a bit hot on
occasion. My shop is my two car garage. Was going to put in a ceiling fan
just to keep the air moving and cool things down a bit but I wound up buying
a Delta Air Purifier instead. I was surprised that the movement of air from
that filter was comparable to a very good ceiling fan, AND I get the filter
factor also. Just a thought.
BTW, did you check with your tract rulers about noise from your shop - also,
if it's a commercial venture - any restrictions on that? Just some other
tract sxxt to worry about.
I HATE homeowner's associations!
I did not know that.
Even in the last neighborhood which was orwellian, no one ever
complained about that noise, even with the garage door open. I doubt
it will be an issue. I like to play music sometimes though so I
usually keep the door closed for that.
100 Amp is probably OK since you are just 1 person and the most you will
probably have on at the same time is a DC, air filter, lights, fan or
AC, plus the machine you are using. A multi-person shop with multiple
machines running at the same time might need more.
An idea I've mulled over myself, but haven't executed on save for
installing a couple of 220 outside outlets when I originally wired up
If you aren't heating or airconditioning the shop, venting to the
outside would be an option, depending on how much dust you generate and
where it is venting to.
A return through the wall between them with filtration would also work.
Here's a thought, how about mounting an air filtration unit in the wall
between the 2? That way the filtration unit would definitely get the
fine dust, right at the source.
6", at least for the main lines. Also on branches that have a big
machine that's set up for, and needs, a bigger duct (eg 20" planer).
I hate drywalling too, as well as trying to mount anything to it. I used
1/2" OSB on walls and ceiling. After hanging the 1/2" on the ceiling
though (heavy), I wonder if 3/8" wouldn't have been a better choice for
I did mount a 4' x 8' sheet of pegboard horizontally on 2 walls in place
of the OSB. Since my walls are insulated, I put a heavy sheet of black
plastic (can't spell vis-queen?) behind it to keep the insulation dust
in the wall.
I have a window unit for heat and AC. I just stuck it in a window
because it was quick. I plan on remounting it through the wall to get
back the light eventually.
Ceiling fan works great in my shop, but make sure you put it somewhere
where you won't be swingung a board into it.
Put the compressor and the duct collector/cyclone
in a little room. Ply both the inside and outside
of the walls - after filling the space between the
studs with old rugs, sheet rock pieces or whatever.
Mass stops sound. And go with a solid core door -
with weather stripping. The resulting semi-
sound proof room will also be fairly air tight
so you'll need to get air in AND out from some
where other than the inside of the shop. Run
an air intake into the space from outside - low
on the wall, and another into the attic with
a a flapper valve Put hardware cloth over
the air intake - keeps critters out of the shop.
Oh - and BEFORE you fill the space between
the studs - cut the holes for your DC piping
and at least two holes for compressor lines.
Will save yourself a lot of grief - DAMHIKT.
That may not be the best bet if there are air gaps between the filler
bits. You might consider insulating the walls themselves, then using
mass-loading on the panels. You can buy prefab panels, or adhesive
mats, or other stuff. Just google on soundproofing walls.
Thanks for the input. I guess it would be better to put something
other than plain old insulation in the walls around the DC and
compressor. I'm not sure where I could get old rugs from though.
Gravel might be a good idea. I wonder how much of this is overkill
though. If I can get 90% of the way there with just osb on both sides
of the studs, I have to wonder whether that would be enough. It looks
like I'm going to have to have an air return in the wall or something.
Maybe the air return back into the shop could be a muffler from a large
deisel truck. I think it would have to be tuned for whatever noise the
two machines made though. It would be interesting to cook up some sort
of muffler type device out of plywood that would cancel the sound
waves, but still let enough air through.
Intakes or venting to the outside is probably out of the question since
heating is a major concern.
The only thing I can think of is if one of my kids got majorly into
woodworking. All three of the girls (oldest kids) expressed an
interest but I won't let them use any of the machines yet. I'm having
a belt/disk sander delivered tomorrow with plans for two other sanding
machines. I think I'd let them use those in addition to the scroll
saw. In those cases, I could see two machines running at once. I
think a bigger liklihood is a rotary phase converter with a 24"
northfield 3-phase jointer I plan on getting at auction for $100. :-)
Like what? I was thinking my only real practical option was an A/C
furnace filter over an opening near the ceiling. Maybe with a plywood
board covering the filter, but on stand-offs maybe 3" from the filter.
It would let the air out, but hopefully reflect sound back into the DC
room. Were you talking about some sort of electrostatic device or
Based on the design of the house, and considering I'm currently living
in a different model from the same builder, I'd be surprised if there
wasn't drywall already on the ceiling and on the walls facing the
It's a 10' ceiling in the garage, and the lights will probably hang
lower than the fan anyway so that the fan blades don't case shadows.
I've been talking with swmbo about the situation. She's agreed to put
the compressor in the basement when it eventually arrives. She seems
ok with the framed opening for the window A/C also. Maybe an A/C with
a built in heater solves that problem also.
I was actually thinking about something like the Jet AFS 1000 air
filtration unit I have mounted on the ceiling to filter the shop air.
But, it would have to match or beat the airflow of the DC. However, I
just did a little more investigation and my DC is 1550 CFM and the Jet
is 1000, so no dice, for me anyway. I'd need a bigger filtration unit or
2 of them. Maybe though, go with your idea and just use the same filters
the Jet uses (they are a 5 micron followed by a 1 micron). Should work
better than AC filters.
If you orient it the right way, you may not need the motor at all,
right? If the DC is running, the air will want to leave the sealed
room. And if you give it a convenient path through the air cleaner, it
should go that way.
I'd cook something up with filters that you can wash out. Or, they
make electrostatic air cleaners for furnaces. I wonder if they'd be up
to the task. Furnaces move a lot of air.
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