Venting and Grow Room efficiency ( get your Ducts in a row) - Page 2

subcool · #11 02-15-2008, 02:56 PM

Quote:

Originally Posted by LoudBlunts

i have a hepa air filter on my intake. source of air? um air? it comes from the outside, but not like you would think. it still lingers in the room...... but i put a window fan in the window to create air exhanges in the room. that is independant from the cab's ventilation as i dont want to be exhausting and intaking the same air...so i thought the window fan would work

i grow in a cab. about 71.5" h 59" w and 20" d

the cab is broken down into different areas. i have supreme ventilation (so i think) but i want to increase the airflow to make sure there wont be any possibility of mold due to the fact that im sog'n and place anywhere from 8-16 small single cola plants in a 40" x 20" space (flower chamber).

i have a 6" exhaust fan in the flowering room. the exhaust and the scrubber also hooks to the mother and daughter chamber.

i want to get a bigger fan (my intake is currently a 4") and possibly route more air under the canopy.... will my bigger intake create smell problems and other problems for my exhaust fan?

I dig it and I think you will be ok but I am not a cab expert by no means.

LoudBlunts · #12 02-15-2008, 02:58 PM

lol....okay well let me get your hvac expertise...lol picture it outside the cab

http://www.rollitup.org/539343-post3.html

this is something like what im talking about.

would the fan on the intake being bigger have a bad effect on the exhaust?

or you do think i should ALWAYS have a bigger, more powerful exhaust than my intake?

CALIGROWN · #13 02-15-2008, 03:05 PM

I hate to ask you questions since so many people blow you up....But just wanted to see what you think about using an inline fan to draw air from the room, through the hood and out of the room? In stead of running air from outside of the room, through the hood, and then back outside the room.....I have 1 fan pulling air through the hood from the other end of the hood...Im adding a second light and Im going to run both lights off the same fan using a y splitter and hooking up a 6 inch booster fan at the exit of the y splitter.....so 2 lights, 2 pieces of 6 inch ducting, 1 for each light, a y splitter that connects the 2 6 inch to 1 6 inch, a 6 inch booster fan hooked to the y splitter, then hooked to my fan...do you recommend sucking the air out of the room through the hoods?

subcool · #14 02-15-2008, 03:25 PM

Quote:

Originally Posted by CALIGROWN

I hate to ask you questions since so many people blow you up....But just wanted to see what you think about using an inline fan to draw air from the room, through the hood and out of the room? In stead of running air from outside of the room, through the hood, and then back outside the room.....I have 1 fan pulling air through the hood from the other end of the hood...Im adding a second light and Im going to run both lights off the same fan using a y splitter and hooking up a 6 inch booster fan at the exit of the y splitter.....so 2 lights, 2 pieces of 6 inch ducting, 1 for each light, a y splitter that connects the 2 6 inch to 1 6 inch, a 6 inch booster fan hooked to the y splitter, then hooked to my fan...do you recommend sucking the air out of the room through the hoods?

If you do not pull cool outside air the temps will rise dramatically and you will have lots of problems UNLESS you have a huge A/C and that would cost more than doing it properly.

So fresh air into the hoods and hot air out through fan into a filter.

Sub

LoudBlunts · #15 02-15-2008, 03:26 PM

Quote:

Originally Posted by LoudBlunts

lol....okay well let me get your hvac expertise...lol picture it outside the cab

http://www.rollitup.org/539343-post3.html

this is something like what im talking about.

would the fan on the intake being bigger have a bad effect on the exhaust?

or you do think i should ALWAYS have a bigger, more powerful exhaust than my intake?

i wonder how big his fan is on the pvc pipes...

Lacy · #16 03-08-2008, 08:43 AM

Yes I have to agree that this is awesome and thank you so very much.
I don't understand it all but hubby is good with this kinda stuff.

Thanks so much for this thread.

Repeated rep forever!!!!!!!!!

Quote:

Originally Posted by squishdoggydog

I have a decent intake and venting scheme, but damn. You need to get your ass to my house and get to fuckin' work!!!

I take it your in the HVAC trade?

UserFriendly · #17 04-15-2008, 11:31 PM

Great thread Subcool. Very practical knowledge you're laying down. RIU is lucky to have you. On that note................

Do you ever have issues with all the heat going through that one fan? Also, is there any way to make sure that the air flows evenly through all the hoods. I am wondering if the hoods on the shortest circuit would get most of the air, leaving the hood in the farthest reaches (the veg room in Jills case) to heat up.

Is it a bad idea to run 2k+ in series? I would just hate to have 1 side of a y-splitter get more air than the other; would pushing vs. pulling affect the ability of the splitter to evenly vent both hoods? Hmmmm, that last one seems oddly worded; you know what i mean?

subcool · #18 04-16-2008, 06:03 AM

You cant run the heat of one bulb across another one and yes its important to do this correctly so static or back pressure is the same. This is done my using ducts the same size and legth so back pressure remains constant.

Sub

UserFriendly · #19 04-16-2008, 11:43 AM

Quote:

Originally Posted by subcool

You cant run the heat of one bulb across another one and yes its important to do this correctly so static or back pressure is the same. This is done my using ducts the same size and legth so back pressure remains constant.

Sub

Ah...hell yeah!

Thanks Subcool. Big ups to you my friend. K+
I have to spread some rep around before giving you more.

UserFriendly · #20 04-24-2008, 09:51 AM

Yo Sub. I need a source for 8" flanges, vents, and ducts to keep my system tight. Lowes, Home Depot, and Google searches are all crapping out. Do you know where I can source these without a business number?