Grow facility

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iwire said:
Just worked in one, I might call it very humid I would not have called it wet.
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Can be soil or hydroponic or aeroponic. If properly designed there will be large capacity dehumidifiers in place. The Growing spaces will be maintained at 68 degF and about 30% RH. Big refrig load. Very little heat ever needed except on very coldest days.
 
dionysius said:
Can be soil or hydroponic or aeroponic. If properly designed there will be large capacity dehumidifiers in place. The Growing spaces will be maintained at 68 degF and about 30% RH. Big refrig load. Very little heat ever needed except on very coldest days.
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30% RH seems a little low. Are you sure about that?
 
gadfly56 said:
30% RH seems a little low. Are you sure about that?
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I know it was higher than that where I was. We have been installing paddle fans over the crop to help move the humid air away from the plants to get pulled away by the HVAC.

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allansparky said:
I am inspecting a grow facility and was wondering if the green house areas are considered damp locations?
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I would say it all depends on the normal procedures of the facility in question. Should they use sprinklers to water the crop - it very well could be a wet location, or at least wet location within the sprinkler zone(s).

A hydroponic operation may be considered dry location - dry can still have occasional spills and other mishaps and still be considered normally dry.
 
According to article 100, a damp location is somewhere between a dry and a wet location. Damp ones are protected from weather not subjected to saturation with water, or other liquids but subject to moderate degrees of moisture.
 
allansparky said:
I am inspecting a grow facility and was wondering if the green house areas are considered damp locations?
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If there is a chance that the humidity level might lead to surface condensation I'd have to say "yes". Basements, IIRC are always considered damp locations at least and usually wet (see NEC definitions for Location, Dry/Damp/Wet), but the worst you could get in some basements I've seen is condensation on the walls during the summertime.
 
ActionDave said:
Wow, it didn't take long for you guys to get into full production.
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:D


It is a legal medical grow facility that built in the past year.

I did notice they have a ton of land available to increase the size of the building and I am sure the private investors where very happy with the results of the recent election.

3,000 amp 480 volt service, with half the lighting on its pulling over 1,600 for lighting and HVAC.
 
gadfly56 said:
If there is a chance that the humidity level might lead to surface condensation I'd have to say "yes". Basements, IIRC are always considered damp locations at least and usually wet (see NEC definitions for Location, Dry/Damp/Wet), but the worst you could get in some basements I've seen is condensation on the walls during the summertime.
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I don't like to classify all "basements" the same way. How much moisture may occur there depends on design factors when the "basement" was constructed. We have many houses built here in the last 30 years or so that the basement isn't any more or less dry then any other floor. If they were indeed "damp" locations we wouldn't have so many with finished off living spaces in them. Occasionally there is a failure of drainage systems and they temporarily become wet or damp but that is considered abnormal conditions.
 
ActionDave said:
Oh, I didn't know MA was legal for medical, I just knew about the recreational vote. I'll be curious how it works out for you guys since you have more population density than we do.
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It is funny, I support the legalization but I was against the BS medical pot dispensaries only because I hate BS. It was such a thinly discussed way of getting pot out to the heads as much, or more than getting it to real medical patients. It turned out just how I thought, all you needed to do was go to the right doctor and you would be given a card.


Can't sleep? Here smoke some weed. Stressed out with life? Here have a joint. You are having trouble sinking up Dark Side of the Moon with Wizard of Oz? Here have a double strength prescription.
 
kwired said:
I don't like to classify all "basements" the same way. How much moisture may occur there depends on design factors when the "basement" was constructed. We have many houses built here in the last 30 years or so that the basement isn't any more or less dry then any other floor. If they were indeed "damp" locations we wouldn't have so many with finished off living spaces in them. Occasionally there is a failure of drainage systems and they temporarily become wet or damp but that is considered abnormal conditions.
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I don't dismiss your experience, but if the basement slab or masonry wall(s) are in contact with the earth it's a wet location by definition.
 
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