16,000 watt hps flower room questions

My buddy just finished building a barn 30 by 40 with 11.5 ft cielings. The location has 4 seasons, everything will be insulated nice with vented hoods. My questions for some bigger growers out there. Theirs a storage.area above the room that will be sealed off seprately with ventilation. Now ive done that math with the dude and he's thinking a 36,000 btu ac/heater mini split will be nice with a backup heater on propane for a emergency. They plan to max out at 48 flowering big plants, If anyone has knowledge on this type of growing any info on affordable mini splits or others that u know are good for it please let me know. The system I checked last was 6,500 dollars. The floor will be a layer of insulation and then a special grid of osb with underneath venting so the pad won't be ice cold in winter. Also some info on a winching system for lifting 4 lights at once would be great for diffrent strains.

May the force be with you.......and a really good lawyer on retainer!!!!!!!!!!

36k btu should do it.
http://www.ebay.com/itm/36-000-Btu-14-50-Seer-Mitsubishi-Single-Zone-Mini-Split-Heat-Pump-AC-System-/250938869721?pt=Air_Conditioner&hash=item3a6d1f47d9
just hang all the lights individually and adjust as necessary. is it really a must that you be able to move 4 lights simultaneously? just go and adjust each one individually save some $.
are u burning for co2? is the room vented? how many cfms are u pulling thru the lights? how many lights on each fan? 11.5ft ceilings are pretty decent. i can tell u with 15ft ceilings w/o a/c hoods and 10+ lights w/ no a/c and outdoor temps of 50deg we have no heat problems. idk how hot the summers are but same room during 100deg summer needed a 5ton dedicated a/c to keep cool.

Rule of thumb: 4000 btu of cooling per 1000W of light. So your looking for at least 64000 btu of cooling. That's means a 5.5 ton unit (12k btu = 1 ton) and that still may not be enough during very hot summers. Air cooled lights will help somewhat, but they only remove heat off the bulb, not radiant heat which can be very high with 16k of lights.Two of the split units you describe may do it but be advised, their rating is at max capacity. You always want to oversize ac units, so I would suggest seven tons of cooling as a minimum.
Hope this helps,
Fred

The unit I'm thinking of is http://www.goductless.com/Mitsubishi-Mr-Slim-mitsubishi-air-conditioner-p/11093.htm. The 1k watt hps will be in 8 inch vented hoods blowing into the second floor a bit far from stuff so were gonna add a water heater/ furnace out there. Going from grow to a bit bigger each time gets.a.bit challenging. Thanks for the info. I myself deal with 0 degree ferenhit temps and my buds house isn't south or anything so I'm adding the furnace as a back up incase the ac heater. Yes co2 hydro still working on the floor insulation atm so we don't have rot occuring. Rock out Tamo

Instead of moving lights, you can have diff areas with diff height settings and just move the plants accordingly as they reach a certain height. That way you can sort out ones that are growing faster and put em together. Good luck and be safe

bowlfullofbliss said:

May the force be with you.......and a really good lawyer on retainer!!!!!!!!!!

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your a hater. idiot.