Grow tent

Discussion in 'Indoor Growing' started by TheReaper, May 28, 2010.

  1. TheReaper

    TheReaper Registered+

    Hello everyone,. I am starting my very first ever grow. Here is what I have so for.

    One Secret Jardin rd300 grow tent. Measure just under 10x10 with a roof space of 6'7.

    I have two air cooled 1000w lights and two 1000 w Lumatek Ballast. Also one 6 inch can-fan for the lights, and number fans for moving air inside the tent, one 6 inch can fan for push air into the tent,. Last stage buckets will be 5 gallon size. Soil with be foxfarm, nut will be from advance.

    PH etc at home has been tested and is good to go.

    Any thought or suggestion on set up would be a great help
    Last edited: May 28, 2010
  2. bigsby

    bigsby Banned

    You won't need to push air into the tent. Those things seal up pretty tight so you will achieve negative pressure pretty easily. Plus, you can run into problems pretty quickly both pushing and pulling air. Is oder a concern here? If not, then I would either return one of the fans or run one fan per light.
  3. cowgirl1

    cowgirl1 Registered+

    if you are sucking the air through your light you are going to want to add air into your tent. This serves two purposes. 1. it helps with the pressure in your tent since you are using one fans to suck air out. 2. You will want to be putting fresh air in your tent.

    not sure why someone would tell you not to use the 2nd fan. As the above post stated "they are air tight" so, if they are air tight and you are sucking with the one fan to take the heat off the lights, and the tent is air tight you are taken away all the air from your plants.
  4. GetThisOrDie

    GetThisOrDie Registered+

    Listen to Bigsby... All you need is fans EXTRACTING air. This creates what is called negative pressure inside your tent. This means that the force of the air being EXTRACTED will draw fresh air in. Having fans that push air into your tent is much less effective. Just open a couple of the flaps on the bottom of the tent and the fresh air will rush right in.

    By doing this it removes the hot air inside the tent and also replaces the air for the plants. Negative pressure... look it up.
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  5. bigsby

    bigsby Banned

    Think about it. A well made tent is nearly air tight. Your fan is pulling air out of the tent at a good clip. If the above statement were true then as the fan sucked out all of the air, your tent would crumple up into a ball! Sort of like sticking a vacuum tube into a plastic baggie. Cut a hole in the baggie (open a few passive vents) and the air pressure is equalized. No need for an intake fan. Note that this is true even in situations where the grow room is not very well sealed in which case the CFM rating of the fan will be the determining factor. Only the largest grow rooms need to push air into a room. Balancing negative and positive air flow with two fans can be very tricky, especially if odor is a concern. Create negative pressure with the out flow and you will be good to go.

    If you can not return the second fan here is an idea. Use fan 1 to vent the lights in a closed loop whereby the fan intakes fresh air from an external vent, passes through the lights, and exits. This assumes that you have glass in front of your lights. Use the fan 2 to vent the tent either with or without a carbon scrubber as per your requirements. As GToD spelled out, you will need to open vents for passive intake - the rule of thumb is 1.5x the external vent so if your external vent is 6" then your passive intake would be 9" or better. It's up to you. Hope this helps!

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