Room ventilation question

[Backwoodsman]

What's up people. I've got a 8x5x6 room. Dual 1kw bulbs in cooltubes. Have air being pulled from outside room straight through both cooltubes in line with a 240cfm fan. Ventilation of room itself is done by a 440cfm 6" in line fan. I would have thought this was more than sufficient.

So that's 240cubic feet for the room. So air is being exchanged twice a minute.

Ambient room temp 64. Flower room temp 78F one thermometer other is 85. Not sure which is accurate. Kinda trust the lower reading one more but not positive either way. So what gives? I was expecting 73-75 max?

Passive intake. Not sure exact dimensions but definitely 2x the 6" exhaust.

Do I need a larger fan for the cooltubes to get Temps closer to those numbers? I know I'm safe but would like it lower. Entire duct run for cooltubes plus ducting is 8'.

Actual vent is roughly 12-14' max.

No carbon filter yet which will make things even worse. Any and all help appreciated!

Peace

 

[Backwoodsman]

I guess I'll just order a second 6" in line and see if that takes care of the problem. It can only be the cool tube fan that's inadequate

 

[Granger2]

2nd fan should help. Hard to say how much, temp wise. For a pretty accurate measure of canopy level temp, spend about $30 on a laser temp gun.
http://www.harborfreight.com/catalogsearch/result?q=laser+temp

 

[Backwoodsman]

2nd fan should help. Hard to say how much, temp wise. For a pretty accurate measure of canopy level temp, spend about $30 on a laser temp gun.
http://www.harborfreight.com/catalogsearch/result?q=laser+temp

Already have 2 fans. But apparently the 240cfm is now sufficient to cool dual 1kw bulbs in cool tubes. I'm ordering the second 440cfm fan tomorrow. That HAS to be sufficient to cool the room.

I have access to an ir gun. I'll check tomorrow with one

 

[Drop That Sound]

Seems like you should just swap the fans, 440 on the cooltubes, and the 24 for the room. better yet ditch the 240 and just use the 1 fan and Y it off so each light is the exhaust and the old hole is the intake.. I'm running the same exact dimensions and lights with just the 440 and no problems

 

[Trich_Tyson]

try insulated ducting.. game changer for sound.. and I'm sure it will help with heat (as intended)

I upgraded to an 8inch fan dialed back.. and it blew my 6 inch out of the water..
I am planning my next build, and biggest decision (and allocation of $) will be ventilated vs. a/c in a lung.

Ill be watching.

 

[dansbuds]

instead of drawing in outside air which can cause temp fluctuations with weather changes , put a 6 x 24" canlite filter & a 440cfm fan on the one end of your lights blowing the air through the lights & exhaust the 2 lights outside or into another room like basement or attic . then use the 240cfm on your intake blowing air into the room .

my set up is a little bigger than yours , but you get the basic idea .

10" fan for the lights & an 8" intake down the middle blowing towards the other end away from the filters .

 

[Trich_Tyson]

how many watts were you cooling there? 4k - no a/c? Pulling air from the house for intake and pushing exhaust thru lights to prevent odor from getting pulled into hoods?
Sound about right?

 

[dansbuds]

how many watts were you cooling there? 4k - no a/c? Pulling air from the house for intake and pushing exhaust thru lights to prevent odor from getting pulled into hoods?
Sound about right?

4k watts , run at night for the coolest temps , intake is pulling cool air from another room in the basement w/(ambient temps of 65 to 70 ) & exhausting out behind my house . filtered air pushing through the lights & out so as to cut down on the stink going through the lights & exhaust . . also have 2 more 8" x 24" filters & 8" max fans recirculating & scrubbing the air in the room . yeah overkill i know , but better safe than sorry .

& yes i'm trying to do it without hooking up my 12kbtu portable AC .... the other 2 lights wont be fired up till the first week in august , i may have to hook it up then . time & temps will tell .