Any Ventilation Experts On?

[dudewithaquestion]

hi everyone. i just got my air cooled hoods and set them up 2 days ago. but i noticed that really nothing much has changed with my room temp. so here are my room specs

1. 9 feet wide by 15 feet long by 9 feet high
2. 3x air cooled hoods with 3x 1000 watt hps lights
3. i have a 8 inch vivosun inline fan with 8 inch duct. the duct itself is 6 inch and i used a 8-6 inch reducer from fan to duct to accommodate the 6inch size of duct ports on the air cooled hoods.
4. the 6 inch duct from fan to 1st hood is around 3 feet long with 1 small bend
5. the duct in between each of the 3 hoods is around 1 foot long
6. and finally the duct from the last hood is around 6 feet long and it goes straight to a window that is sealed off and vented to outside

please note that these are not cool tube hoods they are just regular air cooled hoods and i was having some air leaks around the glass so i put all tin foil tape to cover the gaps and prevent leaks.

- now before i did this i had all my lights just with basic wing reflectors and i used my fan and filter just to get the stale air and heat and smell out and it was extremely powerful... i could hold a piece of paper 5-6 inches away and it would suck it out of my hand and stick to the filter...(just to test the power and suction)
- right now with the fan on max speed setting it barely holds a piece of tissue but only when i lay it up on it. so i lose alot of power and i dont know how to remedy this. i just placed an order for one of those 6 inch metal duct booster that i will add to the end of the duct near the window vent and hopefully that will help. but as it stands my room temp didnt change and i am getting little to no suction. i need to fix this especially when i start flowering for the smell.

any help will be greatly appreciated. and as for if anything is plugged... its not i checked and double checked everything i even went outside and i can see grass it melted all the snow so i am getting some exhaustion lol.

maybe the 6 inch duct booster will fix my issue? or is there any hints tricks tips that can help me?


i edit to add some pics so you all can see for a better visual.

 

[dudewithaquestion]

i feel like having my fan behind all 3 of the air cooled hoods is my problem because all of the power the fan has is being lost in the 1st hood and baffling around. but then it has to go through 2 more hoods and that seems like the problem to me. where if i put the fan on the opposite end it would suck and not lose any power?

 

[dudewithaquestion]

well after a bit of reading i think im just gonna pony up the cash and grab a 2nd inline fan and filter to do the job specific to exhausting the lights. (example - i will buy a 6 inch fan / filter for the air cooled hoods which has 6 inch ports) then i can get my big 8 inch inline fan and filter to just exhaust the room like i had before i had the air cooled hoods. and then just duct both to a ( Y ) duct fitting out the window.

 

[Alienpus]

What about intake, how much air are you letting into the room?

 

[improvise]

I was going to ask about intake too. regards

 

[twnewell]

I guess your running from light to light to light. Don't get me wrong, it will work, but its better to setup like the pic to the right.

The setup on the left will make the last light in the chain very hot. By setting it up like the pic to the right it will evenly cool all lights.

 

[Chris Scorpio]

Ya, WAYYYYYYYYY to much vent pipe
Do like he showed in the last post, or at least 2 fans minimum, 1 fan for 2 lights

 

[twnewell]

Ya, WAYYYYYYYYY to much vent pipe
Do like he showed in the last post, or at least 2 fans minimum, 1 fan for 2 lights

Your absolutely right. A lot of piping. It is very effective at equality removing heat without the worry of heating the last light up more than cooling it down.

 

[dudewithaquestion]

thanks for the responses everyone. i twisted and put straighter a few things and raised the lights a little so that things would be a little straighter but mostly ever since i put the foil tape all around the edges of the glass where the air was escaping from i noticed a huge difference. the room is excellent now and my exhaust fan is running at about 40% power. i was losing all my power in the hoods from the gaps in the glass and hood metal.

as for my intake i have a giant household venmar air exchange unit with 6 inch ducting as seen in pics. this i always keep at a lower power than the exhaust for better exhaustion suction.

also i placed an order for a 6 inch duct booster fan that i will add near the window to help with exhaust and i also ordered a 6 inch inline fan and filter than i will use exclusively for the light / hood exhaust. and the 8 inch inline fan and filter i will dedicate for the room and smell exhaust.

i added some pics of the hood temperature since i sealed off all the air leaks in the hoods and they are all holding pretty steady similar temps. even the last hood (3rd hood) temp right inside the hood next to the bulb is only 105.3 F so the fan seems to be overpowering the job for me.

- the 1st photo is my intake air exchanger and the 2nd pic is of the vent for my intake inside the grow room.
- the 3rd photo is a temp reading of the 1st hood 87 F
- the 4th photo is a temp reading of the 2nd hood 88.5 F
- the 5th photo is a temp reading of the 3rd hood 89.8
and the last photo is a temp reading of the 3rd hood but of the inside of the hood right next to the bulb which is only reading 105.3 F so the air flow for exhaust seems to be doing really good.

and i guess once the 6 inch duct booster fan comes and i add it to the end of the exhaust ducting it will only get better.