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Posted by Ecnerwal on April 21, 2006, 11:58 am
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> Ya, but I'm not sure what kind of insulation would hold up to a full time
> machine shop. The insulation that is there, is a 4' wide roll with a green
> sort of plastic facing the inside of the shop. The plastic is starting to
> get holes and stuff in it from the years of abuse.
>
> I've seen shops where they have sprayed insulation on the inside of the
> walls. After a year or two, the walls are black with carbon dust and chips
> that can't be effectively cleaned.
I guess I have seen exposed fire-retardant cellulose sprayed on things,
but would consider it a poor choice for a shop. Generally there needs to
be an inside wall covering (often more sheet steel in steel buildings,
or drywall) to keep the insulation from direct fire exposure, reduce
physical abuse, and make cleaning possible. Some types of ceiling
insulation (generally not foams) are OK to leave the inside face
exposed, but it's never a good idea on walls, as you have seen.
> I'm just looking for a quick and easy solution
Cheap, fast, good pick (no more than) two? One product which can work,
but is not cheap, is a spray-on exterior polyurethane foam roof -
especially good if your present roof leaks, as it gets you insulation
and a new weather surface. I don't recall seeing that suggested for
walls, and doubt it would be. White steel panels spaced in 4-6 inches
from your present walls and fill behind with insulation of choice
(whatever's cheap) would be the best wall solution I can think of that's
durable and cleanable.
--
Cats, coffee, chocolate...vices to live by
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Posted by on April 21, 2006, 4:38 pm
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wrote:
>
>> Have you considered that more insulation would cost _nothing_ to run,
>> and enough of it could even get you down to running one A/C unit?
>>
>> --
>> Cats, coffee, chocolate...vices to live by
>
>Ya, but I'm not sure what kind of insulation would hold up to a full time
>machine shop. The insulation that is there, is a 4' wide roll with a green
>sort of plastic facing the inside of the shop. The plastic is starting to
>get holes and stuff in it from the years of abuse.
>
>I've seen shops where they have sprayed insulation on the inside of the
>walls. After a year or two, the walls are black with carbon dust and chips
>that can't be effectively cleaned.
>
>I'm just looking for a quick and easy solution, cause in the next few years
>I'll probably be building a larger shop at a different location. Or, selling
>the whole business and starting a different one.
>
>Anybody looking for a small owner financed machine shop with a reasonable
>customer base? :)
>
Spray urethane and cover with sheet steel siding (or sheet aluminum,
or wallboard, or what-have-you)on the inside to make it easy to clean
and fire-proof.
*** Posted via a free Usenet account from http://www.teranews.com ***
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Posted by RoyJ on April 21, 2006, 11:24 am
Please log in for more thread options Short answer: no, a swamp cooler won't work for you.
An evaporative cooler works by evaportaing water into the air OF THE
ROOM. The evaporation cools the air and raises the humidity. It works
fine in the desert where the dew point is in the single digits. It also
works ok in more moist areas where you want to cool down a really hot
area like a furnace room or warehouse. Where it doesn't work is where
you want to keep the temp fairly comfortable AND the humidity down.
In your case, your current AC units are spending a fair amount of time
and energy ($$) pulling water OUT of the air. Using an evaporative
cooler will just be at cross purposes. Not to mention dumping a lot of
moisture into the air to rust your tools.......
You should investigate ceiling fans, floor fans, sealing up the walls,
or even a sprinkler for the roof. You might also check on the
efficiency on your exisiting units. The small 5k btu units are really
bad, going to a heavy duty 12k btu might be a better option and get your
efficiency rating up in the 12 or 13 range. A central AC unit is
expensive but it would allow you to direct cool air to your work area,
let the other parts of the shop get hotter.
Dave Lyon wrote:
> While we're on the subject...
>
>
> My shop is a 4000 square foot metal building with just a little insulation.
> I've got 2 residential air conditioning units that keeps it bearable, but
> not comfortable in our Missouri summers. I've heard that our humidity is too
> high to use an evaporitve cooler in this area effectively, but I've always
> wondered how one of those would do in a shop that has two central air units
> running non stop. Would it actually add any cooling? Would it cause my
> equipment to rust? It would sure be cheaper to operate than a 3rd AC unit.
>
>
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Posted by Dave Lyon on April 21, 2006, 11:40 am
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> In your case, your current AC units are spending a fair amount of time
> and energy ($$) pulling water OUT of the air.
Are you saying that the act of drawing the moisture out of the air uses more
energy? I was under the assumption that dehumidifying the air was just a
nice byproduct of running your AC unit.
If I understand what you are saying, a room at 90 deg will be cooled quicker
and easier by an AC unit if the humidity in that room is low than it would
if the humidity was high?
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Posted by Proctologically Violated©® on April 21, 2006, 12:00 pm
Please log in for more thread options That is correct--likely substantially more, depending depending. Water
vapor has substantially more mass than dry air, plus the heat of fusion,
ekc.
And the suggestion sprinklering the roof is good also--at least a tar flat
roof.
--
Mr. P.V.'d
formerly Droll Troll
>
>> In your case, your current AC units are spending a fair amount of time
>> and energy ($$) pulling water OUT of the air.
>
> Are you saying that the act of drawing the moisture out of the air uses
> more
> energy? I was under the assumption that dehumidifying the air was just a
> nice byproduct of running your AC unit.
>
> If I understand what you are saying, a room at 90 deg will be cooled
> quicker
> and easier by an AC unit if the humidity in that room is low than it would
> if the humidity was high?
>
>
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> machine shop. The insulation that is there, is a 4' wide roll with a green
> sort of plastic facing the inside of the shop. The plastic is starting to
> get holes and stuff in it from the years of abuse.
>
> I've seen shops where they have sprayed insulation on the inside of the
> walls. After a year or two, the walls are black with carbon dust and chips
> that can't be effectively cleaned.