I have 9 1000w hps let’s say and 2500 cubic feet room size with two 8" vortex running exhaust 24/7 how many BTU do I need to cool ?
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Let me tag some members that may know for you 
@tdubwilly @covertgrower @myfriendis410 @Bogleg @macgyver_stoner
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Ur awesome tks once again;) I couldn’t figure out how to lol
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Not a problem at all! I got you
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I gave all my air conditioners away I can’t control smell with them lol. Wish I had kept a couple tonnes worth lol
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Well hopefully you can come up with a different way and not have to buy another one
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I definitely need the heat pump I can buy a new one for 80% off this week only tho so scrambling to figure it out tn so I can order it b4 they sell out
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I’m gonna roll one while u type
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Awe I wasn’t funny enough?
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A BTU is a British Thermal Unit.
I think you want to find the BTUs that 9 x 1000w hps put out.
Then you need to find out if your fans can ventilate enough air per minute or hour or what have you to be able to remove so much heat.
The hard way would be to find and figure out those numbers. And then that isn’t entire story.
How cold it is outside will contribute to over all heat build up and if you are running at night or during the day.
Basic BTU info might not be of much help.
But the BTU output of the lights themselves is a good place to start.
The easy way might be to turn everything on and see how hard you need to run your fans to keep temps down. Adding A/c or a heat pump would certainly change things.
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Running both fans 100% ATM w two lights on during day high it’s 78.5 f .still have 7 more lights to turn on tho . So I suppose I need to cool 100% of 7 lights;)
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Sound thought?
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I like running negative air so there’s no chance of smell issues
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Maybe these can help:
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18000 will do;)
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Tks now I can do cooling calculations 
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The general hydroponic chart was easy to find
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I can get a heat pump that size for 1100$
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Zone for climate are you in? We need to calculate heat loss properly. Colder climates obviously are the largest challenge.
Insulation?
Is this structure connected to a living area?
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Yes it’s in my home and it averages about 80 f right now
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