What size fan do i need?

[twistone23]

The dimensions of my closet are:

L- 55.25" (4.6 ft)
H- 96" (8 ft)
W- 26.75"(2.23 ft)

I'll be using either a 400 or 600 watt light, and i need to know what size fan to buy for each. Any ideas?

 

[TommyHobby]

LOL.... same dimensions as the closet I got to grow in... it's not set up yet, but will be soon !

Your closet is roughly 96 cubic feet... you have to find a fan that sucks out that air at least 15-20 times per hour.

If you get a fan rated at 100 CFM (cubic feet per MINUTE) you'll be exchanging the air in your closet over 60 times per hour. Hope that helps.

 

[sixstring2112]

are you trying to cool the light or just move some air? if you want to cool the air and the light, and you plan on using a filter and a 600 go with a good 6" fan rated for 400 cfm or more and get a speed control for a few bucks more and you will be good to go. i cooled a 4x2x4.5 high cab with a 400hps and 120 watts of cfl with a 6 " duct fan from home depot but that was before it got hot out . had to get a better fan (425 cfm) once the temps got to 75f outside,thats why i say go with the 400cfm or better.

 

[twistone23]

over 60 times per hour sounds great, right? isn't the minimum once every 5 minutes?

 

[twistone23]

are you trying to cool the light or just move some air? if you want to cool the air and you plan on using a filter and a 600 go with a good 6" fan rated for 400 cfm or more and get a speed control for a few bucks more and you will be good to go. i cooled a 4x2x4.5 high cab with a 400hps and 120 watts of cfl with a 6 " duct fan from home depot but that was before it got hot out . had to get a better fan (425 cfm) once the temps got to 75f outside,thats why i say go with the 400cfm or better.

to cool the light. you're probably right. i should go with the 600 and the 6". 400 would be less than 50 watts per sq foot anyway.

 

[TommyHobby]

over 60 times per hour sounds great, right? isn't the minimum once every 5 minutes?

That number is for ventilation/circulation of the stale air inside the closet. If you're looking to COOL the room, then what SixString said is right. The more CFM's the better....

 

[whietiger88101]

Im useing a 18 inch recirlation fan with a 4 inch exhaust fan exit to the roof viva 4 inch dryer vent house i got my exhaust fan from lowes harware its the same type that goes into you bathroom ! im useing a 400 watt MH 18/6 18" fan going 24/7 , exhaust fan going 19 hours a day 18 while the lights are on and once in the middle of the night my temps stay at 78 to 82 * perfect ! thats even with the weather outside being over 100 * !

 

[TommyHobby]

Im useing a 18 inch recirlation fan with a 4 inch exhaust fan exit to the roof viva 4 inch dryer vent house i got my exhaust fan from lowes harware its the same type that goes into you bathroom ! im useing a 400 watt MH 18/6 18" fan going 24/7 , exhaust fan going 19 hours a day 18 while the lights are on and once in the middle of the night my temps stay at 78 to 82 * perfect ! thats even with the weather outside being over 100 * !

how big is your grow room/tent for this setup ? also, do you have a cool tube setup ?

 

[hightimes95]

Hi all.Quick question...

Will a 245 m3/h inline fan with a 1 foot DIY Carbon Filter attached be sufficient to clear the air every 5mins
in a 4x2x4 closet.My head is wrecked trying to figure it out!

Thanks