exhaust question

[endofwed]

FV-05VF2

I've decided on choosing this small bathroom fan to be used as my exhaust. Its only capable of 50CMF but its rated at .04 sones which is something that is important to me, stealth.

I am only growing 1 plant in a extremely confined space... would this fan be powerful enough? I plan on using 4 cfls which brings to temperatures up to 110 degrees F. I've seen computer fans seemingly move more air then this? Whats the point of me getting this bathroom fan then?

My grow space is 35 inches x 30 inches x 36 inches

 

[Medi 1]

diff is a bath fan draws air and pc fans blow. no housings and wont handle the heat or humidity very long
that should be enough to do the job. room is about 18 cfm only so lots left for heat and humidity. set fan horizontal in room at top not on its side. they draw better this way

 

[jondamon]

I use some PC fans by akasa called VIPER and also the APACHE PWM BLACK fan

The viper is 84CFM's and is very good at pulling and pushing air has moisture and dust resistant parts.

The Apache is 54CFMs and is very good also at pulling and pushing and again has the same military grade moisture and dust resistant parts.


J

 

[Medi 1]

never seen a pc fan that does what it claims foir drawing air yet. they arent designed toi draw...they do but not the rated cfm. that is for blowing as meant in a pc. with out the pc case to make the housing for it, or a semi sealed environment they dont draw hardly nothing. is why they usualy have 1 blow and 1 draw. needs the help to actulay move air outr of the box instead of just blowing it around in the case. ive trie3d both and feel his works better.
maybe if you built a small housing around the pc fan they do a better job, but buying a bath fan is cheeper than asll that work.

 

[jondamon]

never seen a pc fan that does what it claims foir drawing air yet. they arent designed toi draw...they do but not the rated cfm. that is for blowing as meant in a pc. with out the pc case to make the housing for it, or a semi sealed environment they dont draw hardly nothing. is why they usualy have 1 blow and 1 draw. needs the help to actulay move air outr of the box instead of just blowing it around in the case. ive trie3d both and feel his works better.
maybe if you built a small housing around the pc fan they do a better job, but buying a bath fan is cheeper than asll that work.

ihave built a mother box here https://www.rollitup.org/grow-room-design-setup/368478-mother-box-design-setup.html

and fans are mounted on the outside of the box silicon sealed around them with ducting bracket inside with approx 1ft of ducting and the VIPER fan sucks out very efficiently temps 3inches under my 200w CFL are max 24.9C and inside a propagator 26.2C max.

You might want to check it out.


J

 

[Medi 1]

no use to me as none will cool what i run here. i dont use cfl`s.
put an 84 cfm real fan up against a pc fan of equal cfm and see what pulls more. im not saying they dont work, just not one id recomend is all.

 

[reggaerican]

FV-05VF2

I've decided on choosing this small bathroom fan to be used as my exhaust. Its only capable of 50CMF but its rated at .04 sones which is something that is important to me, stealth.

I am only growing 1 plant in a extremely confined space... would this fan be powerful enough? I plan on using 4 cfls which brings to temperatures up to 110 degrees F. I've seen computer fans seemingly move more air then this? Whats the point of me getting this bathroom fan then?

My grow space is 35 inches x 30 inches x 36 inches

thats cool i just used a cheap $12 bath fan on my friends budget grow room.. they work great..

 

[jondamon]

no use to me as none will cool what i run here. i dont use cfl`s.
put an 84 cfm real fan up against a pc fan of equal cfm and see what pulls more. im not saying they dont work, just not one id recomend is all.

i only run a 200w CFL in my mother box.

they just cant cut it with my 600w hps RVK all the way for that.

but for CFL's they work great IMO.


J

 

[leroy79]

FV-05VF2

I've decided on choosing this small bathroom fan to be used as my exhaust. Its only capable of 50CMF but its rated at .04 sones which is something that is important to me, stealth.

I am only growing 1 plant in a extremely confined space... would this fan be powerful enough? I plan on using 4 cfls which brings to temperatures up to 110 degrees F. I've seen computer fans seemingly move more air then this? Whats the point of me getting this bathroom fan then?

My grow space is 35 inches x 30 inches x 36 inches

What are your ambient temps without the lights on? If the lights cause a 20-30 degree temp climb then you will need an intake blowing the cool ambience in. In order to keep up with the heat emmitting from your lights, the exhaust will need to be higher CFM than the intake. My grow-room has a 600w HPS. Using a light tube, my intake blows cooled air at 50 cfm in through the light fixture. Air moves through tube gets heated at bulb (but not as hot as it would be if I had no intake), then with a smaller diameter ducting(higher cfm) attached to a higher powered inline(120 cfm) is used as exhaust.My entire enclosure is unaffected by the lights heat. When I set the temp in the house, those are the temps I see in my growroom because the hot air blows directly onto my home A.C. temp sensor