[manitu]

How do you people ventilate your LED grows?

I guess the usual way , to extract the air from above the lamps doesn't cut it..

I'm thinking of putting the outlet at the coldest point , like on the floor , and the intake above the lamps. With decent air circulation in the box , this should work fine

What do you think?

.manitu

[LEDGirl]

If you run into issues with heat (say 90 degrees or above) then the method you mentioned would likely be the best to cool your area.

[manitu]

To clarify , I meant to extract the coldest possible air out of the box , to prevent the heat to escape. And maybe put the fresh air intake above the lamps to heat it up a bit.
kind of the oposite of a HPS grow.

.manitu

[unclefishstick]

maybe a small intake fan and passive exhaust to keep fresh air coming in,but letting the air pressure push the old air out through a carbon filter passively.

[manitu]

Originally Posted by unclefishstick

maybe a small intake fan and passive exhaust to keep fresh air coming in,but letting the air pressure push the old air out through a carbon filter passively.

Would only work in a completely sealed room.
If odor is an issue , allways keep your growspace under negative pressure , evacuating trough a carbon scrubber.

.manitu

[unclefishstick]

ah,but thats for an old style system,it would have to be well sealed,but since the plants grow more efficiently at a higher temp than a standard garden,maybe reversing the typical filter config is a good strategy.really just sealing it and adding co2 is the best route,just need a fan to keep the air moving in a basic tent set up then.

just my two cents anyway...

[HHHG]

Originally Posted by manitu

How do you people ventilate your LED grows?

I guess the usual way , to extract the air from above the lamps doesn't cut it..

I'm thinking of putting the outlet at the coldest point , like on the floor , and the intake above the lamps. With decent air circulation in the box , this should work fine

What do you think?

.manitu

I think you have it backwards - the intake goes at the bottom (cold) and exhaust goes at the top (hot).

[manitu]

Originally Posted by HHHG

I think you have it backwards - the intake goes at the bottom (cold) and exhaust goes at the top (hot).

I know..
My question was if ventilating the oposite way will provide decent ventilation , or if the fresh air will drop to the floor , and go right out again.. But I see that retaining heat while supplying fresh air is a difficult task..

But here's another idea , how about a heat exchanger?? Those rotating heat-exchangers made of aluminum would recycle 80% of the heat.

.manitu

[MeanBean]

Just flip your design, vent it in the proper direction. Fresh air is important, it will flow easier this way. If you need some heat Slap some UV Ray CFL's in there.

[unclefishstick]

Originally Posted by MeanBean

Just flip your design, vent it in the proper direction. Fresh air is important, it will flow easier this way. If you need some heat Slap some UV Ray CFL's in there.

That was what I was trying to get across.In a typical HID lit room you would exhaust the hot air from the upper area of the garden and bring fresh air from the cooler lower area in a passive fashion to create a negative pressure inside the garden.So with the LEDs,perhaps creating a positive pressure in the grow area would allow the "stale" air to be pushed through a filter passively while allowing the air inside to remain at a high enough temp to take advantage of the increased plant growth.Just my speculation,MeanBean has actual experience with the lights.