quick ac question

Will 36000 btu's be enough for a 12x30 insulated shed with 4000ish watts ?

oilfield bud said:

Will 36000 btu's be enough for a 12x30 insulated shed with 4000ish watts ?

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depends
where are u (what is the normal temp range)....deep south middle of the country upper northern section
what kind of hood ............... open or air cooled
what kind of ballast...............attached to the light or hung on wall with 15 foot cord to hood

Texas, 1 gavita pro 1000, 2 solistek matrix running 1000w DE with kingwing reflectors and then t5s and probably 1000w on a light mover for vegg. All open hoods

oilfield bud said:

Texas, 1 gavita pro 1000, 2 solistek matrix running 1000w DE with kingwing reflectors and then t5s and probably 1000w on a light mover for vegg. All open hoods

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You can squeeze more in that space, surely?! I put x4 Gavita 750's in a 12 X 9ft flower room, 400w cobs in 8 x 9ft veg next door with a pair of 4ft T5's for a nursery.

30ft is much room man. I'd cram some more.

And I'd give the 3-ton over to flower and get another something for veg. And insulate real good. If you got $$$ you can't beat a quality spray foam job.

Lol oh I definitely want more. But that's all I can afford right now. Lol but I definitely planon upgrading with a ccouple harvests

I wanna split it down the middle and put 4k on each side with a flip schedule. But that will come later

Pink batt insulation for you then!

Kidding. Stuff works just fine when you do a good job of it. I ran R13 in my shed walls and R19 in the ceiling. Summer days can peak 110F but i've not seen the room ambient jump over 80F, and is mostly steady at 76F.

Tree shade helps too.

oilfield bud said:

Texas, 1 gavita pro 1000, 2 solistek matrix running 1000w DE with kingwing reflectors and then t5s and probably 1000w on a light mover for vegg. All open hoods

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no it will not be enough in the hottest days

the honest truth ......your going to need 2 2ton minimal

those working together one in the front one in the back will be enough if u combine it with a good air movement plan

when u break it down into 2 areas one for each and u will be fine ....i think u might want a 3 ton in the section with the gavita

what i know about this is simple

1000w u are looking at 8000 btus standard
open reflectors tack on 4000 btus more for each (air cooled ones drop it to 1000)
connected ballast (it is next to the light bulb) that is another 3000 4000 btus


8 times 4 is 32
4 times 4 is 16
4 times 1 is 4
that is 52,000 btus for a controlled area

hence why i said the 2 2 tons and a good air movement and when u seal it off the need for a 3 ton

Well that blows. Back to the drawing board

Don't blow just yet. It's rarely that simple and shouldn't put you off. Many folks aim for 4k BTU per 1k of lighting as a baseline, but even with DE you're not looking at double that.

A lot of these basic calculations assume so much along the way.

Besides, its really only a ballpark and there are other things to consider such as insulation, build quality, ventilation/circulation, available building shade (trees), and decisions such as running lights at night only etc.

I will say my Gravitas add 7-10F each to the room and thats without any girls in there, and all that needs cooling, plus the dehu adding a little.

All that being said it is better to oversize your AC than to regret it later. You don't want it chugging. If you find a solid wholesaler the price isn't completely off-putting.

ruwtz said:

Don't blow just yet. It's rarely that simple and shouldn't put you off. Many folks aim for 4k BTU per 1k of lighting as a baseline, but even with DE you're not looking at double that.

A lot of these basic calculations assume so much along the way.

Besides, its really only a ballpark and there are other things to consider such as insulation, build quality, ventilation/circulation, available building shade (trees), and decisions such as running lights at night only etc.

I will say my Gravitas add 7-10F each to the room and thats without any girls in there, and all that needs cooling, plus the dehu adding a little.

All that being said it is better to oversize your AC than to regret it later. You don't want it chugging. If you find a solid wholesaler the price isn't completely off-putting.

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i try to account for alot of that

i think the 2 2 tons will do it he just needs 2 fans going to make a little inside vortex that will move the hot air to them and pull the cool air to the center to spread out

it should actually kick off from time to time it gets to temp

OK I can drop all the double ended lights for now and run se 1000s with hortilux bulbs and bump my ac up to 46000 btu's. 28 in flower and 18 for veg.

oilfield bud said:

OK I can drop all the double ended lights for now and run se 1000s with hortilux bulbs and bump my ac up to 46000 btu's. 28 in flower and 18 for veg.

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rem to do a vortex
that is why i said set it up on different ends of your area .....they have started a mini vortex/vacuum near them already u are just going to make it larger and combine the 2 into one at the center of the room ......there is a suction at the top of the mini splits ......if u do it right u will increase the effectiveness of them

think about mixing a glass of chocolate milk .....how u make that vortex in the milk stirring it ......u are going to do the same thing in the air .....for this just rem u want to flip it so the end of the vortex is up instead of down
now u are going to need 2 static powerful fans .......mixing the milk the way u set up the AC will tell u how to set up these

this will complete replace the need for fans moving over the leaves ....it will remove the IR heat for u

now if u add CO2 burner u just need to make sure placed right or they could blow out .....but if u do u will love it ......this system u made will keep the gas falling on them mixing with oxygen getting u the most acu reading u can get .......this is the design i plan to use myself in the venture in oregon


there is a 2nd choice i been playing with it works great in a sealed room with a tent system adding Co2 ........but it could be applied here with better results
u take a carbon filter like 170 cfm ones and use a 4 inch fan and u run ducting over top of the lights ....run to end of the room and cap the ends off .....then in the ducting u just run u cut slits in set spots (depends on what u want dump on the light dump on light and plants dump on plants)

the carbon filter is directly under the mini split pulling in the cool air (and co2 gas) then it is getting dumped out over the plants or lights cooling them even faster (the ducting if u do none insulted will heat transfer and cool the upper air too ) ....the side benny of this is u are cleaning the air of smell and mold and pollen and all kinds of stuff

Sounds good man, I can definitely get the a vortex going. But no co2 yet. But I definitely plan on getting it

You can run 9 1k Gavita with a 36k BTU mini split acwith temp around 74-80degrees.
https://sunlightsupply.com/shop/bycategory/ac-dehumidification-humidification/samsung-mini-split-air-conditioner-systems