to push or pull

[icdude]

i am running a 1000 watt lumatek and a active air 6 inch inline fan with the powerbox flipswitch, which allows 2 reflectors to run in the same room. i was wondering is it more efficient to push or pull the air through the reflectors i have always pulled (air flows this way -> in both cases) ( carbon filter = reflector = reflector = fan = exhaust vent) but recently i have been reading that it is better to push which would be ( carbon filter = fan = reflector = reflector = exhaust vent). thanks for any suggestions and opinions.

 

[gingerale]

it depends on the type of fan you're using, but a centrifugal blower is typically going to be more efficient with an unrestricted inlet, i.e. blowing, then the other way around. but either configuration can work as long as the ducting before the fan is not overly long and complex.

 

[gingerale]

oops i totally read over what you said about the 6" duct fan. thats a simple axial fan, it doesnt really matter where you put it in the duct, it will perform the same (i.e. shitty). i have one of those and it did OK to cool a 1000W bulb, but doubt it would have worked with a carbon filter too. but then again, if you are using enclosed reflectors it might just work fine for ya.

 

[milehimedi]

pull

 

[BudZad7]

Push Or Pull ??

Push Or Pull ??

Hi All!! If can filter is in same area as plants >>> >>>Filter>>fan>>hood>>exhaust>>>>>>>>>this is pulling filtered air out


If can filter is outside grow area (tent etc...)Fan>>>Hood>>Fan>>Filter>>
>>exhaust>>>>> this is pushing filtered air out
I hope this is right!! Correct me if not right!!!

 

[icdude]

Hi All!! If can filter is in same area as plants >>> >>>Filter>>fan>>hood>>exhaust> >>>>>>>>this is pulling filtered air out

yea the question is whether to put the fan right after the filter or right before the exhaust vent?

>>>Filter>>fan>>hood>>exhaust> >>>

or

>>>Filter>>>>hood>>fan>>exhaust> >>>

 

[DankSide]

Have had no problems this way.

Hood=>Ducting=>Fan=>Ducting=>Filter

this is pushing air out of the filter while cooling the hood while bringing in fresh air for the plants as well, eliminating the need for 2 exhaust fans.

 

[AOD2012]

hey i run a closed set up with c02, and this is how i run mine. fan pulling in from intake, pushing through two 600 watters with daystar hoods, and out the exhaust, with a separate fan recirculating the air, pulling through a scrubber. i was pulling it previously,with the fan right next to the exhaust instead of the intake, and i was only cooling one light then. now i have to two lights on, and my ac works a lot less harder, and there is also not the slightest trace of smell, which there was just a little bit when i was pulling through the light. hope that helps.

 

[icdude]

Spot on man..literally. I also run a closed c02 system and also run 1 light (1k) with the fan by the exhaust. Now that I'm gonna have two I'm gonna switch the fan to by the intake. thanks.

 

[AOD2012]

yea bro it really worked out well for me. i have also heard from a few people that not pulling the hot air through your fan dramatically increases the life of the fan. just try and seal up as well as you can(which you probably already have), because if your lights arent sealed up and everything it can push the c02 rich air out of and cracks that might be there. let me know how it works.