I HAVE TO LEAVE MY TENT DOOR OPEN FOR TEMP CONTROL WILL THIS SUBSTANTIVELY AFFECT MY YIELD?

[eugene b]

I have a four by 8 foot tent in this tent i have a twin lid 300w cfl a single lid 300w cfl and a hps 600w red spec hps. my plants are 3 weeks into flower with some clones and seedlings on the go to...i leave a tent door fully open for the full 12 light cycle with all the lights on this is to keep the temps at around 78 to 80 f ...will keeping the door open affect the yeald in a substantial way? i have one inline fan and a 4 inch carbon filter and a 12 inch stand fan that is on the go all day...if i close the tent doors the temp goes up to 90 f any advice and help would be welcome.
Thx-)

 

[warble]

If you're not supplementing co2, then having the tent open will probably increase your yields. More air exchange the better. If you want to keep your plants alive in 90° temps, you might think of supplemental co2. You will have to time your exhaust so it doesn't suck out all of your co2 when its fresh.

 

[Carolina Dream'n]

Only thing to worry about is smell later in flower. That carbon filter most likely isn't large enough to scrub the whole room.

 

[RM3]

Open is good, wide open even better, sealed is flawed, you will see and you will smile

 

[Carolina Dream'n]

Buy a bigger fan and carbon filter and install. Make sure the hot air being extracted from tent is going somewhere other than that room (out the roof or to a lung room)

 

[THE KONASSURE]

so you have 3 x 300w cfl`s running in your tent ?

Dude that`s where all your heat is coming from pull them all out and instead add one 600w MH or hps or even a 400mh them big cfls give off a load of heat and they don`t give much flowering light, the 105w ones are as big as I go with cfl`s as they get real hot

you can put them on metal shades and then suck your extract or blow your fans on the metal to help cool them but you`d be better off dumping the 900w of cfl your using and going with a 600w mh in a cool tube or something ?

 

[eugene b]

Only thing to worry about is smell later in flower. That carbon filter most likely isn't large enough to scrub the whole room.

I agree carolina 4 inch filer for the size of tent is too small i need a 6 inch filter really just the cost prevented me this time round will get one on the next grow-)

 

[Carolina Dream'n]

If it's cold in your area try to use that to your advantage. Cut the heat off to that room. Crack a window if your comfortable with it. Add ducting to your intake to outside. All kinds of ways to help the problem without spending a lot of cash.

 

[eugene b]

so you have 3 x 300w cfl`s running in your tent ?

Dude that`s where all your heat is coming from pull them all out and instead add one 600w MH or hps or even a 400mh them big cfls give off a load of heat and they don`t give much flowering light, the 105w ones are as big as I go with cfl`s as they get real hot

you can put them on metal shades and then suck your extract or blow your fans on the metal to help cool them but you`d be better off dumping the 900w of cfl your using and going with a 600w mh in a cool tube or something ?

im gonna have to run to the enD with the cfl's on this grow and invest in some mh/hps on the next run...ill get some fans on the cfl's though try and cool them they are the biggest you can get and do run real hot!!! i got them because on ebay they said they run really cool like no heat so i thought that was great....they lied...they are a heat problem and will be swapping them out as soon as i got the cash to do so....thx for the help bro appreaciated...-)

 

[eugene b]

If it's cold in your area try to use that to your advantage. Cut the heat off to that room. Crack a window if your comfortable with it. Add ducting to your intake to outside. All kinds of ways to help the problem without spending a lot of cash.

i have cracked the windows really helps with the temps...

 

[eugene b]

Open is good, wide open even better, sealed is flawed, you will see and you will smile

NICE!!!-)

 

[green_machine_two9er]

Keep the air flowing. ! Will increase yields just by avoiding heat related issues alone. 80 is the max I like to get to under my lights.

 

[THE KONASSURE]

if your having big issues with the heat then run the cfl`s one hour on one hour off

unlike hps cfl`s don`t blow much faster if you turn them on and off a lot and honestly you`d need over 1200w of cfl maybe even 2000w to match a 600hps so no real point going to loads of trouble to keep all the cfl`s on

you could also try a heatshield/light spreader for your hps ? will even out the light and heat and get you more yield all round?

 

[kupihea]

Interesting thread, thanks.