Remove Intake Filter Yes or No?

[cannabuzz]

Hey Guys,

I noticed some of my seedlings (1 week old tomorrow) slightly "cupping" at the tips. I've been reading around and it seems like it could be heat stress on the plants and/or low humidity. The temperature inside my grow tent did hit 93F-95F with 15% RH yesterday so I put two and two together.

I've put a humidifier in there to raise the humidity to about 35% but of course temps are still high.

I have a 5x9 grow tent with 6" exhaust fan, and oscillating fan inside to move air and a bottom flap with an intake filter to clean the air coming in when my exhaust is on (negative pressure). I have a feeling that the attached intake filter is somehow restricting the air coming in and not allowing to cool inside the tent.

Does having an intake filter restrict or make any difference as far as the amount of air coming in? Should I remove it to lower temp?

 

[Mikell]

Yes and yes.

Elbows, Wye's, long pipe runs, reducers, pleated ducting, etc all reduce air flow.

What type of filtre? Pleated?

I wouldn't bother unless the tent is in a room where you're actively creating airborne dust re: mixing soil, a garage, etc.

 

[cannabuzz]

Yes and yes.

Elbows, Wye's, long pipe runs, reducers, pleated ducting, etc all reduce air flow.

What type of filtre? Pleated?

First, Thank you for the feedback.

I have a 'Phresh Intake Filter'

My tent is in a spare bedroom and the house is pretty much always clean. I do have the windows open but always keep clean around the tent.

 

[AvidLerner]

filter air going out of the tent. let air flow into tent freely. peace

 

[cannabuzz]

filter air going out of the tent. let air flow into tent freely. peace

Got it. Thanks!

 

[queequeg152]

no... putting the filter on either side will seriously hamper the airflow.

all filters hamper airflow. you are trading static pressure for cleaner air.

problems occur when your fan does not have enough static pressure to trade in the first place... sounds like your fan is in this category. if you wanted to post some pics, i could igve you some advice to lower the static pressure losses, but in all likelihood it will not matter a whole lot considering that 95% of the static pressure losses will occur at your carbon filte.

best thing you could do is get a far larger carbon fiilter(more surface area, less static pressure loss) or a larger fan.

 

[Backwoodsman]

filter air going out of the tent. let air flow into tent freely. peace

I would assume he is referring to a carbon filter for odor which shouldn't be an issue for you at this point. I would remove filters and upgrade to a larger fan at soon point or an air cooled hood/cool tube. What are you using for lighting that is getting the temp that high?

 

[fortphoenix]

I would assume he is referring to a carbon filter for odor which shouldn't be an issue for you at this point. I would remove filters and upgrade to a larger fan at soon point or an air cooled hood/cool tube. What are you using for lighting that is getting the temp that high?

i think having a filter (non carbon) on intake is a great idea depending on where the air is coming from, my cold air comes from my attic then goes through my light and into my tent so i def need a filter, i just use one of those blue HEPA filters, works and fits perfectly. then a again, thats just for my small veg tent so i don't need to worry about smell