If you need to pull air in and out id just get a couple cheap 4 in inline fans and then a booster for the outtake shouldn't run you that much.
Actually until I turned off one of the 8" fans, as I was keeping the tent 2-degrees cooler than the outside air.
Got cocky. Yep!
I think these
two, 0.23 amp pulling marvels will do the job in tandem, Jswett. The thing about blowers, even 4" ones, is that they
make noise and use gobs of
e-lect-tricity! Now I'm a Scot, and yes,
a thrifty Scott, but not a
denying Scott. I will
cave-in to common sense.
I'm going to try to use my two 8" fans until crop devastation beats me down to change. That'll be fun!
•••
Kevin Vicario, a designer and principal at
nextlight gave me these pointers for LED panel positioning in Veg and Bloom states:
"Whether you're doing
16/18 or
24-sunlight vegging, keep the light panel
24-36" above the canopy. For
bloom-stage, keep the light panel
8 - 12" above the canopy."
••••
In another of my
failed experiments, last night, after the (7) clones had been in the GH semi-direct sunlight all day, and
did well - I decided that I could save
5¢ off our electricity bill and only use (
1) one
8" fan blowing tent air out the top, and turn the
bottom 8" vent fan off. Bad idea. This morning, the
tent was 4-degrees higher than the outside air.
Warning: Don't let your tent air get hotter than the outside air.
One young
Pez had collapsed from the stress. Unconscious, he was removed with the others from the tent and placed into the GH where a fan will move air over him until he revives.
••••
Poor little (probably over-watered, not heat stroked) Pez. According to grower/dispensary owner, now long-haul truck driver Ron Chang: "
Pez is a sativa with
no ceiling".
So, rise and shine...you little creep.
Go thrive!
•••••
The two 10" intake and exhaust ports are above each other. In the pic above of the tent. See where that blue towel is covering that deep cardboard box? That's the inlet vent where the 8" fan is shown blowing air in.
(I turned that fan off last night, wrong!)
But, with both fans going, you've got air blowing across the bottom of the tent, putting the plants in
slightly less than the normal wind conditions on a mountain valley in Afghanistan.
With both 8" fans going, the tent sides pull-inward slightly. There's air a'movin in there! Look at the tent! You can see it's ribs!
Of note: You can see that the yardstick reads 28" above the
floor. That's suppose to be from the top of the
canopy! I
need to move the LED panel up about another 5". Will do so today.