QUOTE (heyboy @ Aug 19 2009, 08:18 PM)

Hi soso
Thats some lighting set up
Im worried you wont be able to lower the lights with fan inline hanging in middle
also all those twists and turns in ducting will cause drag and noise
cool tibes were designed to have a seperate cool air supply running thru them
In the UK its common for us to extract thru them
So - you could have one fan extracting straight up and out
the other fan just cooling the 2 cool tubes -
hb

Hey heyboy, thanks for the heads up... the cooltubes are connected with ducting to an rvk inline fan inbetween. It sucks air out from one light and pushes air through the other. There is only ducting in the middle to connect the fan to the cooltubes. I allowed more ducting on each side of the rvk to allow the cooltubes to be lowered and raised on the eazi-rolls there hung off. i learned from other peoples mistakes

thanks for the tip thou!
I dont think the pic is clear enough but there is only one U bend on each side of the rvk fan that connects the ducting. I have tested the flow and the rvk pushes more than enough power to move that hot air away. Also the cooltube>rvk>cooltube is NOT connected to the cf or exhaust. Surprisingly the rvk is close to silent when running..
QUOTE (heyboy @ Aug 19 2009, 08:36 PM)

OK Just noticed
Your not supposed to extract and intake in same room
CO2 wil become depleted!
Just another thought - plants need to be 20c lights off - It will be near freezing in winter
make a hole in wall house side and draw fresh temperature stable air in from cavity ( assuming there is one)
filtered hot air can then go straight out into the garage ( stealthy )
cavity air is warm in winter and cool in summer - (less bugs and pests) and noise
hb

Can you please explain about the co2 depletion?
I have two 8" phat filters on 8" rhino fans. The fans are directly mounted onto the cf's. I then have (acoustic) ducting in a L bend shape for each one to shoot up and out the roof ports on the tent.
As before, the inline fan is independant to the exhaust ones.
The exhaust fans are rigged to my ecotechnics controller along with a floor standing fan heater.
The ecotechnics controllers got a humidity/temp sensor and adjusts the speed/heat of things to stay in tune (while also keeping my neg pressure active).
I didnt think co2 rich air would be much of a problem since i am running neg pressure? I will be buying an airstone for each table to allow oxygen rich air into the root-zones. Will that help?
Ill get better pics up for you guys soon, thanks for looking out peeps and for all the positive vibes! Cheers!