A/C Advice

Help me make up my mind guys, should I go with a mini split or wall unit. Currently using 13500 btu portable unit which is ducted under my building. As we all know these suck for removing humidity. It was fine when I was growing in a basement but no basement now. So let me know what you fellow growers think I’m leaning toward the wall unit do to the cost difference between it and a mini split.

thisbuds4u101 said:

Help me make up my mind guys, should I go with a mini split or wall unit. Currently using 13500 btu portable unit which is ducted under my building. As we all know these suck for removing humidity. It was fine when I was growing in a basement but no basement now. So let me know what you fellow growers think I’m leaning toward the wall unit do to the cost difference between it and a mini split.

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Mini split 24k

Keep in mind the bigger splits need 220v

Thanks power isn’t and issue building I have has 200 amp service when I wired it I planned for future upgrades. Appreciate the advice.

In general, you never regret going first class, whichever way that is for you, go for it!

Question about a 24000 btu mini split 2 zone, would each zone have access to the full 24000 btu ? My building is divided into the growing area and my work shop. Growing area 250 sq foot divided by a insulated 6” wall my work shop is 400 square foot.

thisbuds4u101 said:

Question about a 24000 btu mini split 2 zone, would each zone have access to the full 24000 btu ? My building is divided into the growing area and my work shop. Growing area 250 sq foot divided by a insulated 6” wall my work shop is 400 square foot.

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No the split zones would come with two 12K indoor heads and a 24K condensor.

So would that cool and remove humidity in 650 total square ft? Grow area 250 sq. ft. Shop 400 sq. ft.

thisbuds4u101 said:

So would that cool and remove humidity in 650 total square ft? Grow area 250 sq. ft. Shop 400 sq. ft.

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How much humidity an AC removes depends on how many watts you are spending. The more watts the more the AC will work to cool the room and remove more humidity. 24K is small if you are lighting the whole 250sqft. To light that you want like 8000-11000W on lights LED or HPS to light it. Which would need 11000x3.41btu= 37510BTU.

Running 6 spider Farmer sf 4000’s and 3 hid 600’s

The HID’s are vented underneath my building

thisbuds4u101 said:

Running 6 spider Farmer sf 4000’s and 3 hid 600’s

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6x450x3.41= 9207 Btu
3x600x3.41= 6138 btu

its 4500W total which is a bit low IMO for250sq ft imo. Are you growing in the whole area? Is just a section of the 250?

based on the lighting a 24K would be sufficient for cooling. But if you need dehumidification you should address that separately because on the night cycle you will freeze your girls out drying the place.

thisbuds4u101 said:

So would that cool and remove humidity in 650 total square ft? Grow area 250 sq. ft. Shop 400 sq. ft.

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You’ll need a dehumidifier that would do the amount of plants in the grow you can’t go by square footage in growing. So how many plants and what medium?

MidnightSun72 said:

How much humidity an AC removes depends on how many watts you are spending. The more watts the more the AC will work to cool the room and remove more humidity. 24K is small if you are lighting the whole 250sqft. To light that you want like 8000-11000W on lights LED or HPS to light it. Which would need 11000x3.41btu= 37510BTU.

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Remember though ac units are designed for people comfort not plants they’ll never pull enough to properly dehumidify the area properly. Plus I seen a co2 burner in the background so that’s more heat coupled with his fans and everything else he’s going to need bigger. @thisbuds4u101 you need more cooling honestly man. You want it to run but not too long and not run enough. Both are bad on ac units. What are you using total equipment wise?

So help me understand this I’m a retired social worker with great handyman skills. I’m running 6 sf 4000 spider farmer’s which the best I can figure out is a total of 2700 total watts. My 3 HID’s are 600 watts each totaling 1800 watts that’s like a total of 4500 watts I believe I’m running. Help me out with size of dual zone mini splits. My shop is 400 square ft not much heat produced in there. I truly am clueless to the calculations needed to cool and remove the humidity from the building thanks so much

Mini split. Size it right get a heat load calc done if your serious. Dont oversize the unit it wont dehumidify.

Pro mix hp and 30 plants also using co2 gen. 4 burner 2 16” oscillating fans 2 12’ light rails ventilation is infinity 8” running a closed system HID’s are air cooled with 8” AC infinity inline

Who does heat load calc?

thisbuds4u101 said:

Who does heat load calc?

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You. It's your grow. I did most of it for you. Just take all the watts in your room including fans pump, dehumidifiers etc. Multiply it by 3.41BTU/watt. And that's how much btu each device will produce. Then you want to size your AC to be a bit bigger so it can manage the heat load reliably while not working too hard or too little.

Gotcha I’m thankful someone knows what they’re doing. You all have been a great help much appreciated!