Tent seems unseasonably hot even with 22,000 BTU. Am I doing something wrong?

Discussion in 'Grow Room Design/Setup' started by Bobsmith339, Jun 25, 2017.

  1. Ok so basically I have decided to upgrade by grow this time to an 8x4 tent from a 4x4 tent. I've read online that you need roughly 4000-5000 BTU per 1000w light. Anyways, I have a 14,000 BTU Whynter portable A/C and I thought that would be enough, long story short, it wasn't (Temperature reached 81+ degrees) and I had to go to Home Depot to get a second 8000 BTU portable A/C. I just hooked it up tonight and while the temperature is in an acceptable range of roughly 75 degrees with a few hot spots I need to fix, it still seems that it's hotter than it should be. Maybe I'm wrong, but I feel that with roughly 22,000 BTU's of cooling power, the tent should be in the 60s since I'm only using two 1000 watt lights. I am going to optimize the second 8000 BTU AC tomorrow by putting it on a table so the ducting to the top of the tent will be shorter, but still it seems like to me at least that the temperature should be much lower. I am wondering, if anyone has any suggestions on what I might be doing wrong? Here's what I have in the tent:

    - Two 6" cool tube's (Just basic run of the mill cool tubes. I haven't put the add on wings on though I doubt that matters.)
    - A Nanolux 1000 watt digital ballast and some shitty ballast I got from a local hydro store. They are inside the room, though it seems unlikely that that would cause the temperature to rise more than 1-2 degrees, if even that.
    - One IPower 6inch inline fan (442 CFM)
    - 4 clip on fans
    - 1 Lasko 16" oscillating fan
    - 1 Whynter 14,000 BTU Portable A/C
    - 1 LG 8,000 BTU Portable A/C

    I'll take some pictures of my setup tomorrow, (I'm not currently at the house.) though I've done grows before and know how to set them up. I'm thinking either there's an air leak somewhere that I haven't found or that my 14,000 BTU A/C is finally giving in. I have had it for over a year now, so I guess it's possible that it's starting to go. Any suggestions?
  2. portable ac units suck just buy a window one ,are you venting outside? sounds like you could use a second inline fan one just for the lights the other for the tent

    is the ac your air intake?
  3. AC is also expensive to run. Are u running ur lights at night?
  4. Yes the AC's are being used as the air intake. I haven't considered a window A/C I guess I could try that, though wouldn't that leak a bunch of smelly air outside? If that's the case then it's a no go. I do have a Big Blue Ozone Generator for the portable A/C exhausts, but surprisingly it doesn't really smell outside with them, and I have yet to use it. I also was surprised that I didn't have to turn on my Can 150 filter last grow too. Guess cheap carbon filters are getting better in quality. If I did use a second inline fan, it'd only be for the vegetative stage. I actually use CO2 during flowering (Yes I know everyone says it's sacrilegious inside a tent, but I've actually had good results with it.).

    I'm still in the testing phase since I hope to get the temperature down a little bit more, but yes I plan on running lights at night. I performed the test roughly around midnight. And no kidding, they sure are expensive! I only ran one last time and my power bill was around $400 a month. Not too happy about having to run a second one, after this grow I plan on either getting a mini-split system or a server rack cooler. Unfortunately, I don't have the money for them now and I'll also have to get an electrician to do some work too.
  5. nope no smell issues (you still use a charcoal filter in tent ) in fact many new ones have a air cleaner built in (ion neg)

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