Pleas help me A/C sizing.

[oracle3301]

I am trying to figure out how much cooling we need for a grow space that I am building and helping a client design. The grow area is 21'wide 45'long 10' high their will be 16,000 watts of hps and 5,000 watts of LED lighting, the client wants to use digital ballasts with adjust a wings but he is open to aircooled hood, how much would it change the a/c sizing with air cooled hoods? What size carbon filter would be needed for this area? Any help would be much appreciated. Thanks.

 

[joe macclennan]

roughly 3k/cooled hood and 6k for uncooled.

then you have to factor in heat loads from dehumid's

add that on top of the building heat load

how well are walls insulated? what climate are you in?

there are many factors to consider when sizing ac

 

[TheSnake]

Big... a central cooling unit for something around 2000 square foot. which is about double... you may even need more if those hoods are not air cooled.

 

[TheSnake]

get the biggest thing you can afford. it will pay for itself in the long run...

 

[SnapsProvolone]

3 kbtu/hr for a vented 1kW
4 kbtu/hr for an unvented 1kW

 

[joe macclennan]

ime your uncooled sizing is a little low snaps.

 

[SnapsProvolone]

I am going to say get two 5 ton ductless minis, each with multiple zone 1 ton air handlers and spread them evenly. Low ambient rated is best.

 

[oracle3301]

I am going to say get two 5 ton ductless minis, each with multiple zone 1 ton air handlers and spread them evenly. Low ambient rated is best.

This is almost exactly what we had calculated. This grow is in southern Colorado will we need to add a humidifier? Humidity is currently 18%?

 

[fir3dragon]

This is almost exactly what we had calculated. This grow is in southern Colorado will we need to add a humidifier? Humidity is currently 18%?

18% humidity is because of winter. Summer, I'm sure it will rise. My humidity is similar but at 30% because I keep a bucket if water in there. It doesn't do much of shit. Plants look good so far though.

 

[budleydoright]

This is almost exactly what we had calculated. This grow is in southern Colorado will we need to add a humidifier? Humidity is currently 18%?

If you are running sealed (which it sounds like you are) Yes.

 

[SnapsProvolone]

Soco is high desert territory. Dry is the word.

Plants make the best humidifiers imho. Get a good perpetual going.

 

[ScoobyDoobyDoo]

STAY AWAY FROM MINISPLITS in this case. If your client wants adjust a wings and 16,000w you are going to need air handlers. Probably 2 3-4 ton units (depends on ambient temps) that are ducted throughout the room. Putting a bunch of minisplits everywhere is going to create problems in your room. technically you should never have more than 1 minisplit in a room.

besides, why would you but a minisplit for 16,000w? that big of a grow and you need to learn what an air handler is fast. also...just duct the air handler to distribute the air evenly throughout the room.

 

[superstoner1]

I say that if you are planning that big of an area and having to come here to ask that question, you've got bigger problems coming.

 

[SnapsProvolone]

STAY AWAY FROM MINISPLITS in this case. If your client wants adjust a wings and 16,000w you are going to need air handlers. Probably 2 3-4 ton units (depends on ambient temps) that are ducted throughout the room. Putting a bunch of minisplits everywhere is going to create problems in your room. technically you should never have more than 1 minisplit in a room.

besides, why would you but a minisplit for 16,000w? that big of a grow and you need to learn what an air handler is fast. also...just duct the air handler to distribute the air evenly throughout the room.

I have lots of grows with multi mini split air handlers. They rock. Even distribution of cool without bulky ductwork. Remember low ambient too, freeze kits suck, inverter units rock.

 

[Ou8aCracker2]

Calculating The Size of a Air Conditioner

 

[ScoobyDoobyDoo]

I have lots of grows with multi mini split air handlers. They rock. Even distribution of cool without bulky ductwork. Remember low ambient too, freeze kits suck, inverter units rock.

minisplits have a shitload of problems always. I prefer air handlers or for smaller rooms window a/c's. seems like minisplits are always leaking and breaking down. plus, running multiple in the same room is not efficient. they end up working against eachother. if you need to put multiple minisplits or anything above 3tons then just get an air handler and if need be just duct it.