Quick question

Ok I've upgraded from a 400w to. 600w cooltube
So question is do I go carbon filter cooltube inline then out of tent?

i'd put the fan on the filter, and have it exit through your tube, but to each his own.

Scrubber up to ceiling, straight to air cooled hood, straight to fan and out. Also recommend a small input fan (lower corner)

If you care at all about costs/efficiency don't oversize much if exhausting outdoors. It will cost you greatly on your heating/cooling bill. You will want to run at minimum speed required for keeping your temp and RH.

Filter, fan, cooltube, exhaust

Pushing air with fans is not efficient. Go filter, cool tube, fan, out... Pulling air better, if you can.

Always attach the filter to the input of the fan. That way you only have to worry about one joint being air-tight, the flange connecting the filter and fan. If you do it differently you run the real risk of venting the grow room smell out your ehaust.

I have been told you can cook the fans over time if your pulling air through them. Ive always gone Filter - fan - cooltube - exhaust

Hugo Phurst said:

Always attach the filter to the input of the fan. That way you only have to worry about one joint being air-tight, the flange connecting the filter and fan. If you do it differently you run the real risk of venting the grow room smell out your ehaust.

Click to expand...

That's a bloody good point

kiwipaulie said:

I have been told you can cook the fans over time if your pulling air through them. Ive always gone Filter - fan - cooltube - exhaust

Click to expand...

Extra heat, bloddy good point there too.

Hugo Phurst said:

Extra heat, bloddy good point there too.

Click to expand...

or another way I used to do it, was to have a completely different fan that's ducted from outside the tent, drawing cold air over the bulb and then duct it out the side and out of the grow room area.

my 2 cents - loose the cool tube, go bare bulb, fan blowing on bulb, suction out the tent to filter, cool air intake in front of tent. I like to keep anything that doesn't like heat and humidity outside of my tent. MD

hey moon, wouldn't that really heat things up?

For efficiency, its better to pull air, and never had a fan go out from exhausting lights. Did have to replace one that a rat chewed his way into, needless to say it was a lil off balance after that.

BuzzD2Kill said:

For efficiency, its better to pull air, and never had a fan go out from exhausting lights.

Click to expand...

i had a shop owner tell me something once about fans. said, "think of it as a chain. you pull the chain, it follows, no problem. you push the chain, things are a bit different." i have a fan for my filter, and a diff. one for my hood.

I run at 79 18hrs strong right now cause I'm growing up homemade ladders. I pull air from the top of my bulb out the tent through the fan out a 6' run to the filter where it exhausts cooled air over the top of my veg area.

Cheers everyone I've gone filter to fan to cool tube then out temps about 27 degrees in tent and there's plenty of air coming out

moondance said:

my 2 cents - loose the cool tube, go bare bulb, fan blowing on bulb, suction out the tent to filter, cool air intake in front of tent. I like to keep anything that doesn't like heat and humidity outside of my tent. MD

Click to expand...

I don't like this idea I had trouble keeping a 400w bulb cool with a wing setup bare bulb
Second I live in australia and the climate is hot there in no cool air to bring in unless I make it aircon
Electricity in aus is about 22 cents a kW

Gquebed said:

Pushing air with fans is not efficient. Go filter, cool tube, fan, out... Pulling air better, if you can.

Click to expand...

Iam pulling through filter then into tube and out side or should I go filter onto tube then duct from tube to fan then out?

my buddy had a hot bedroom in his upstairs. we had the fan pulling air from the room to the outside. it stayed pretty hot up there. we turned the fan so the cool air blew in and it made a huge differance. this leads me to believe blowing air threw the hood rather than pulling it threw is the way to go.