Hi GC I want to start a small closet grow on a 48x24x60" tent with a 600W MH/HPS cool tube reflector. Is 190 CFM enough ventilation for this space? Will that inline fan + filter be enough to pull air into the system from the bottom holes and out the top or do I need an additional fans there? Any additional advice or tips will be appreciated. Thanks
Add a tower fan in the corner of tent and and exaust air out of the room either through ceiling or wall. Then with fans filters running close the closet door and light a incencse stick and hold it by the bottom of closed closet door and watch to see if the smoke sucks under the closed door into the closet hold the stick a couple inches from the bottom of the closed door. If the smoke all gets sucked under the gap at the bottom of the door then your good! Just watch your temps and dont let them get above high 80s
I think you will be pushing the limits there. A good quality fan will pull through all that easier than a low quality fan even if their cfm rating is the same. Once you add filters, ducting and other restrictions that cfm figure goes out the window. If you want one fan to draw air in to the tent, then through a filter, then blow through ducting, then cool tube, then more ducting and finally out, I would go with a 6" or 8" fan of proper quality. I only use Systemair fans myself, they are top quality I have a 600w HPS in a cool hood in a 3'x4' tent and I use a 5" fan to cool the light, and a 4" fan to exhaust the tent through a filter. This works well for me
That's what I think I'm going to end up doing, I got a 4: ventech fan attached to the filter and it will vent back into the room, then I have a 6" fan on the cool tube that pulls air from and out the ceiling again. The only problem I have is that my tent has 2 x 6" opening on the sides and 2 x 4" on the back which is against a wall so I don't have where to exhaust unless I cut a hole in one of the side vents, do you keep these vents open in your tent? does light from the room that leaks in there cause any problems?
my tents have a port at the back that I use for cables, and a port on the ceiling that I use for an exhaust. I cut holes in the sides of the tent and bolted a flange and faceplate together sandwiching the side of the tent in between. The ducting is then attached to the flange. I'll see if I can find a photo. I have vents at the bottom but the light is mostly blocked by flaps. I also leave the bottoms of the doors unzipped and I never have any light leak issues
Thanks for all the info Gold I wish mine had a port on the top, I'm going to have cut one out. How tall is your tent?
how does the LED work for you? I have one that I wanted to use that looks exactly the same as yours, its 1000W, but i was told by the manufacturer to keep it at least 30 inches from the canopy which is half my space in this tent.
Your led will burn plants when too close! Ive done it trying to get minimum distance away before finding exact distance! It will spot the leaves darker then those spots will quickly turn telltale light brown and crisp up in a couple of days. Leds if running 5 watt and higher chips burn when 12 inches or so from top canopy! Fans moving your foliage around alot can help if you need to get them closer due to stretching hope this helped on the led question
I'm keeping mine 30 inches away, I have the 5w LED, how much closer should I get, my room i also a little bit hot, about 82 when lights are on.
While it's in with the 600w HPS is doesn't really make any noticeable difference. It's a MarsHydro 100x3w. Rated at 300watts and draws 170watts. I have used it without the HPS and its pretty good but it's best kept a couple of feet away because it does burn leaves. It creates hot spots possibly due to several lenses focusing on the same spot
I would get my led about 14 inches away from top and use a strong ventilation fan moving plants around a bit ... Bit then changed to california lightworks 220 ful cycle led with one super quite fan lower heat issues and way way way more stuff my plants crave! Like no joke out performa any 600 watt hps or mh with like 132 watt pull and only a 9x9 x4 little red square box! I did not think that this light would be much better but it has been!
Ended up getting a gorilla 8 foot tent just because my plants grew so much better and larger than mars led could do
have you actually tried this comparison yourself? Or did the person selling the LEDs tell you this? What yield do you get from that 132w light?
Actual testing done by me! Not some sales person! Cali lightworks light kills it! No shit! No comparing of the two they arent even on same planet! I didnt think there would have been a real big difference but there is! I dont regret using the mars hydro 300 for first grows but i dont recomend it if you got extra bones get a smaller, quieter, much more powerful light
you have a strange attitude in your post, I'm not sure what that is all about. Maybe it's from all the exclamation marks you keep using. What yields are you getting with your 132w LED? And what yields were you getting with the 600w HPS ? I would like to know the actual difference. "not on the same planet", doesn't really mean anything, I'd like to know the figures
I did a test side by side with 3 x 1000W HPS and 3x1200W Mars and the results were pretty much the same, got a little bit more from the HPS, but not enough for all the heat they produce. Is there something "new" on these LEDs you have now? How much did you pay for that LED?
I am sorry for the confusion... I was simply comparing mars hydro 300 watt against the cali lightworks 220 full cycle led. And my results using the same plants and nutes were three times more using the cali lightworks led vs the mars hydro led on photoperiod plants. Just under two times as much on autos. Again sorry for confusion