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General => General Discussion and ??? => Topic started by: Sbrem on July 17, 2018, 02:52:23 PM
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I posted a week or so ago about our air moving problem, and it looks like we're going to go with 2 - 24" downblast exhaust fans in the ceilings 24' up. I was checking with a friend who knows of these things, and he suggested that we get some $300.00 portable AC units, and set them up with some venting next to work stations, in our cases, the printers and catchers. I'm trying to wrap my head around it; he swears it worked very well at the old Dennison (Avery now) plant in our town for the older (100 years plus) parts of the buildings.The idea being to just cool that small area around the worker and it made the work bearable, much better than the ambient air. It was 102? yesterday in the shop. Any thoughts? I'm just throwing it out there for some brainstorming if anyone gets a minute... we have no windows, the only air intake is when we open the loading dock doors...
Steve
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if you are drawing air out of your shop you will also need a way to get fresh air in - otherwise you will have negative air pressure inside and your dryers wont exhaust properly (assuming you have gas dryers).
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if you are drawing air out of your shop you will also need a way to get fresh air in - otherwise you will have negative air pressure inside and your dryers wont exhaust properly (assuming you have gas dryers).
though we have no windows, we can open the doors to the loading dock, which would provide the incoming air. Good tip, thanks, was aware already. I almost like the sound of the portables, but I'm having trouble thinking it would work. On the other hand, the guy who told me about it knows his stuff. I do see some very expensive portable industrial air conditioners, so maybe it's not that crazy of an idea...
Steve
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+1 for makeup air. You need way more than you think and the doors aren't always open. Less of an issue if you are in a leaky old building but still I think makeup air deserves more attention than it ever gets.
We don't use ac proper but have a swamp cooler pointed at both ends of the belt to take the edge off.
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I used one of the portable ACs last summer positioned directly behind me so the air would literally blow into the back of my shirt and puff it out. Worked well enough considering my shop was regularly around 118 to 120 degrees...
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Great Conversation about an important employee welfare issue.
How about some pictures of the portable AC and the ducting operators can adjust to meet individual preferences? Anybody got any?
My HVAC guy likes the idea but he wants something as a starting point.
Pics???????
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I don't have any pics from the old mill in town that my friend was speaking of (though my grandfather was a lifer there) but I did see some industrial versions that have tubes on them so the air flow could be directed...
Steve
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...suggested that we get some $300.00 portable AC units...
If you go this route, check the reviews on the model you get. I set up an LG unit in our shop this summer, and found that some of the time it properly blows air @ 70 degrees, but sometimes blows @ 90. Not much more than a fan at that point.
But the principle is good. Our shop is such that we have a window unit a couple of feet behind the loading station. The shop is still hot, but it makes working in the summer heat bearable at the press.
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We have one of these blowing right at the press and looking to add a few more around the shop.
https://www.comfortup.com/mitsubishi-ductless-36k-mr-slim-air-conditioner?id=350940&gclid=CjwKCAjwyrvaBRACEiwAcyuzRM4TQW7sO9nXKqzCpN-aS-SbFRe67UihoYWHFAkgsC7cYpJfb57ThxoCbUkQAvD_BwE (https://www.comfortup.com/mitsubishi-ductless-36k-mr-slim-air-conditioner?id=350940&gclid=CjwKCAjwyrvaBRACEiwAcyuzRM4TQW7sO9nXKqzCpN-aS-SbFRe67UihoYWHFAkgsC7cYpJfb57ThxoCbUkQAvD_BwE)
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These were the best, and then they were discontinued:
https://www.globalindustrial.com/p/hvac/air-conditioning/commercial-portable-ac/portableairconditioners-spotcooler-etl-approved-796000 (https://www.globalindustrial.com/p/hvac/air-conditioning/commercial-portable-ac/portableairconditioners-spotcooler-etl-approved-796000)
We also have a bunch of these at the shop
https://www.globalindustrial.com/p/hvac/air-conditioning/portable/portable-air-conditioner-8-000-btu-115v (https://www.globalindustrial.com/p/hvac/air-conditioning/portable/portable-air-conditioner-8-000-btu-115v)
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While not central or portable AC does anyone have experience with the 12 and 14 foot fans by bigassfan.com ? I know they did serious warehouse installations and assume they work but how well?
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While not central or portable AC does anyone have experience with the 12 and 14 foot fans by bigassfan.com ? I know they did serious warehouse installations and assume they work but how well?
I've heard really great things about them.
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Same. They have them all over central Texas and seem to work well.
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While not central or portable AC does anyone have experience with the 12 and 14 foot fans by bigassfan.com ? I know they did serious warehouse installations and assume they work but how well?
I checked them out in Hot Shop part 1, wouldn't work for us, we'd just be pushing the heat downward, but they seem nice...
Steve
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These were the best, and then they were discontinued:
https://www.globalindustrial.com/p/hvac/air-conditioning/commercial-portable-ac/portableairconditioners-spotcooler-etl-approved-796000 (https://www.globalindustrial.com/p/hvac/air-conditioning/commercial-portable-ac/portableairconditioners-spotcooler-etl-approved-796000)
We also have a bunch of these at the shop
https://www.globalindustrial.com/p/hvac/air-conditioning/portable/portable-air-conditioner-8-000-btu-115v (https://www.globalindustrial.com/p/hvac/air-conditioning/portable/portable-air-conditioner-8-000-btu-115v)
This last one is what my friend was telling me. Our shop is in the 90's plus, would they work in this situation do you think?
Steve
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These were the best, and then they were discontinued:
https://www.globalindustrial.com/p/hvac/air-conditioning/commercial-portable-ac/portableairconditioners-spotcooler-etl-approved-796000 (https://www.globalindustrial.com/p/hvac/air-conditioning/commercial-portable-ac/portableairconditioners-spotcooler-etl-approved-796000)
We also have a bunch of these at the shop
https://www.globalindustrial.com/p/hvac/air-conditioning/portable/portable-air-conditioner-8-000-btu-115v (https://www.globalindustrial.com/p/hvac/air-conditioning/portable/portable-air-conditioner-8-000-btu-115v)
This last one is what my friend was telling me. Our shop is in the 90's plus, would they work in this situation do you think?
Steve
yeah they do. our shop, is currently like 115 (even worse, we have 3 acs in the warehouse, and 2 of them are broken due to a poser issue from our provider !!!), and those are huge big buckets of win.
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I would also try and vent the air close to the ceiling, either with an exhaust fan cut high into the wall or through the roof. the more hot air you remove, the better.
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I would also try and vent the air close to the ceiling, either with an exhaust fan cut high into the wall or through the roof. the more hot air you remove, the better.
Yes, with absolutely no other escape, that will be part of it. But, do we need one or two of those roof ventilators if the portable AC works out...
Steve
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We did one in the ceiling. It helps.
I would suggest two. I want two.
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We're also thinking two exhaust fans in the roof, 24".
Steve
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I'm thankful to have central heat and AC in our shop. We keep it 70-73 all year.
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I'm thankful to have central heat and AC in our shop. We keep it 70-73 all year.
Lots of great tips in this thread that will benefit shops even if they have air conditioning already. Efficiency beats power.
Are you doing anything in addition to ?having a/c??
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We have 3,000 sq. ft. with 10' ceiling with a annual heating and cooling cost of $1,200.00.
Also we don't have a huge drier just a 40 amp drier, 2 flash units and some hot presses.
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We have 3,000 sq. ft. with 10' ceiling with a annual heating and cooling cost of $1,200.00.
Also we don't have a huge drier just a 40 amp drier, 2 flash units and some hot presses.
Around these parts, that would have been dirt cheap 30 years ago!
Steve