Exhaust/Aircooled Hood Question

I plan on growing in a 1m x 1m x 2m tent with a 1000w HPS in an aircooled hood...I was wondering, can I set it up in such a way?

Air in tent --> Carbon Filter --> Aircooled Hood --> InlineFan --> Outside tent.

Arrows indicate direction of airflow and obviously Im planning on using (short as possible) lengths of ducting. Is this a good way to cool light and exhaust "used" air or should I have it:

Air in tent --> Carbon Filter --> InlineFan --> Aircooled Hood --> Outside tent

Any help would be appreciated!

I have mine set up like the second example. This keeps your air cooled hood under pressure, so any air leaks blow out into the tent, not suck stinky air into the ducting. I know the best way is to have dedicated fans for exhaust and light, but my setup works fine for me.

sparkabowl said:

I have mine set up like the second example. This keeps your air cooled hood under pressure, so any air leaks blow out into the tent, not suck stinky air into the ducting. I know the best way is to have dedicated fans for exhaust and light, but my setup works fine for me.

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What sorta wattage lights you running outta interest? Cos ambient temperature isnt a problem here!

Harrekin said:

What sorta wattage lights you running outta interest? Cos ambient temperature isnt a problem here!

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Your not gonna be able to handle the heat from a 1000watt light in that small a space unless you do some other sort of supplemental AC, I'd say biggest you could go is 600 watts, I have a 400 watt light running in a tent with high ambient temps and I have to run a external AC and run a fan config like you mentioned in your second example.

Harrekin said:

I plan on growing in a 1m x 1m x 2m tent with a 1000w HPS in an aircooled hood...I was wondering, can I set it up in such a way?

Air in tent --> Carbon Filter --> Aircooled Hood --> InlineFan --> Outside tent.

Arrows indicate direction of airflow and obviously Im planning on using (short as possible) lengths of ducting. Is this a good way to cool light and exhaust "used" air or should I have it:

Air in tent --> Carbon Filter --> InlineFan --> Aircooled Hood --> Outside tent

Any help would be appreciated!

Click to expand...

First example is what you want to do

Second exapmple suggests you blowing the Air in tent through the air cooled reflector, problem is the air in the tent is already going to be hot.. Sucking hot air out is better for cooling..

Here is a good visual representation, some say drawing hot air through the fan wears it out faster.

My cabinet in 2' x 3' or 60 x 90 cm. I run a 400w HPS cooled by a 6" inline fan and my temps stay right around ambient. My fan is hooked to a controller and only runs 100% when my bedroom is 85 degrees (30 C).

Either way, you are drawing tent air through your fan and hood, and your tent air shouldn't be that hot anyway. In the first example, the only part of your duct work that is under vacuum is the section from the filter to the fan. Then you have your coolish tent air going through your fan before it gets heated by the hood/light, and all of the ductwork after the fan is pressurized and any leaks in your ducting won't be sucking in stink air.

Oh yeah, and don't forget about the passive intake like Bonzi shows, if that air is cool enough, you could run a 1000w, but the air would have to be really cold. I'd say 600 would be good also, anything over 50w per square foot is a waste without CO2 and 1m by 1m is 10.75 sq. feet.

Thing is during summer here it never gets hotter than maybe 68 (20C)...but a 1000w in that space you reckon without CO2 is a waste, that the general consensus?

Harrekin said:

I plan on growing in a 1m x 1m x 2m tent with a 1000w HPS in an aircooled hood...I was wondering, can I set it up in such a way?

Air in tent --> Carbon Filter --> Aircooled Hood --> InlineFan --> Outside tent.

Arrows indicate direction of airflow and obviously Im planning on using (short as possible) lengths of ducting. Is this a good way to cool light and exhaust "used" air or should I have it:

Air in tent --> Carbon Filter --> InlineFan --> Aircooled Hood --> Outside tent

Any help would be appreciated!

Click to expand...

I would just hook the carbon filter to the proper inline fan just after the Aircooled Hood(orwhateva) that way your pulling air properly through the carbon filter (not losing suction going through the light) and the light system. This way you also filter any air that leaks in through the Aircooled Hood.

so it would be something like

Air in tent-->Aircooled Hood---> Carbon Filter ---> Inline Fan ---->>Air out tent

Optimally you would use a smaller fan to pull air in the tent and a strong fan to pull it out.

Just my thought and ideas on the setup lemme know if I'm wrong.

How can you stick the carbon filter in that order? And you know the whole point of the fan is to pull the air over the lamp...right?

I just went carbon filter straight to the fan and out the tent, and attached a small duct booster fan to the hood pulling air across the light not pushin. eliminated all that ducting to the hood when you want to lower and raise you light. It seemed like the fan wouldnt hold with duct tape but it was no problem.

Its an aircooled hood, the point of the ducting is to suck/push the heat off the bulb and out of the tent, Im gonna be using a powerful inline fan tho cos I want it to exhaust the tent too.

Iv decided on using two 600's in seperate tents on seperate Amazons for hopefully a more bountyful yield.