Temperature problems.

Ok so I have a bit of a problem with my grow room. I can't keep the temperature below 97*F and I can't seem to keep my humidity above 20-30%.

The room is about 11'Lx9.5'Wx7'H. I have the two exterior walls and ceiling lined with IR block. I have plans to do the other two walls as finances allow. I have 15 plants in a DWC system. They are going to grow into 2 8'x4'(spereated into 2'x2' area's) scrogs. They are sitting under 4, 4' parabolic reflectors with two, 600 watt HPS bulbs and 2 600 watt CMH bulbs. For ventilation I installed a 6" vortex fan, 6" carbon filter, and a 6" booster fan through the floor for an intake.

Even running just the 2 CMH bulbs and the fans full speed I hit about 87*F 25-35% humidity. If I run all four lights it hits about 100*F. Having to run the fans 24/7 makes it impossible seemingly to get the humidity above 20%. I had originally intended to run an 8" vortex, but had to settle in the end for a 6"... Is that part of the problem?

I was considering taking down two of the reflectors and putting up a pair of light movers instead(bonus of saving on power). Would that work? If there a more cost effective option? What can I do?

Thank you very much for your time.

Grab yourself some cool tubes they work a treat for heat issues,Id deffo uprate that intake fan tho ,Gl

With that much light I agree cool tube reflectors are in order. And your humidity will go up as your heat goes down.

Getting cool tubes isn't really financially feasible for me. The only reason I would be able to afford the light mover is by selling the two ballasts and reflectors I wouldn't be using.

Cut 6 inch holes and vent the top of parabolics. Attach 6" round duct to your vortex fan. You can buy 6" metal flanges on ebay or wherever and attach those with a "Y" spliter attached to 6" duct and fans pulling air out of the room via the top of the parabolics. This is the only way to do it and it would only cost 30 bucks.

2-1000 watt hps. 70-82 degrees
2 - 4" ducts -> 4"-6" wye -> 6"-8" transition -> 8"-10" transition -> 10" inline fan -> filter in garage.


I tried a 6" fan but wasn't strong enough for 2 lights. Temp never goes above 82 degrees @ 14" above canopy.
Portable air conditioner & 3 oscillating fans in the room.
Oh & in Arizona where it gets 115 in summer.


Damn iPad won't let me add the pics. I'll post them tomorrow from laptop

Either gonna need to get a better fan , like a 8 inch hydrofarm active air 720 cfm like $88 and $12 for shipping , This fan is Awesome I used to run duct fans and had same problem with 95-100 degree heat. Put 1 of these fans in and I had 3400 Watts in flower at that time and dropped to 72-75 ish, or go with cool tubes but I don't like the Idea of 0 reflector or even air cooled reflectors losing 10% through glass. You can get Cool tubes from 1000bulbs for $52 for 6 inch ones. Personally I would not hack your reflectors. I used to own a few light movers also and they didn't seem to do the job like I wanted them to. Waste of $ imo. Maybe someone else has had good luck but speaking from my personal experience they are junk. IMO the best thing to do is fork over a few more $ for a better fan like the one I posted above you will not be dissapointed. I would find some way to come up with the $ for the fan and try not to sell your lights. Cause then you will end up losing $ selling used and then you will have to buy another again. You got this far , whats another $100. Try to sell your other 6 inch fan for part of the $ for the new one....I am just one guy and one opinion maybe someone else will pipe in also...

Btw that fan at 88$ was on amazon. Unfortunatly I paid 180$ for one at our rip off hydro shop. But I needed it right away. I still think it was worth the overinflated price . I should of listened to everyone on here years ago when I first started medical MJ. But I learned like 6 months ago on the fan situation. Don't bother with AC. too expensive . Just stick with good fans and vent em away.....

Heres the pics. Works good.

do the reflectors go horiz and vert? Imo I would run those horizontal

I ended up ordering Some 6" aircooled reflectors and an 8" fan off amazon. I'm going to sell off the parabolic to help recoup some of the cost.... 720 CFM should be more than enough airflow to cool 4 600 watt bulbs. I cut a hole in the floor so it will suck fresh, cold, winter air. Going to route the exhaust into the central air ducting to help heat the house.

ftrfta- I feel your pain. I paid over $300 for a 6" carbon filter and fan. Should have bought everything from amazon from the start.

Split ac asap