noob alert, first grow

Looking at an inline duct fan pushing 80cfm for ventilation. Temps are pushing 82. Want it lowered a bit. At the moment only have a fan pushing in fresh air with passive outtake

I have a 400w my/hps. But it's not cool tubed. It's in the open so temps are quite on the up side. What's the best ventilation for this type

Any fan/exhaust set-up that causes negative pressure. Move your fan to suck air out instead of pushing it in. Use the passive on the intake and the active on the exhaust.

That'd be where I'd start.

420 carson said:

Looking at an inline duct fan pushing 80cfm for ventilation. Temps are pushing 82. Want it lowered a bit. At the moment only have a fan pushing in fresh air with passive outtake

Click to expand...

Not a big enough fan to vent anything more than a couple cfls ..................and ffof kicks ass.....

420 carson said:

Looking at an inline duct fan pushing 80cfm for ventilation. Temps are pushing 82. Want it lowered a bit. At the moment only have a fan pushing in fresh air with passive outtake

Click to expand...

Earlier in your thread a mech e gave you fan advice, go back and take a look. I would not waste my time on any inline, get a larger exhaust fan. I've been very happy with Max Can Fans http://www.canfilters.com/max_fan_home.html

hth

Got 4 in inline fan pushing 170 cfm. Feels like nothing is coming out. There a piece of card board on one side

Just got sn 4in inline. But it doesn't make a difference in temp. Wtf. I have a opened hood reflector

Is the cardboard blocking it? May not be moving enough air? How big is your intake?

auto white widow from pyramid seeds
Shown first pistil at day 28 and growing healthy and big but no real bloom or flowering almost day 70 reaching but looks like day 70 healthy plant many branches and one thick stalk. Help appreciated