Help with fans

My room is about 6ft x 15ft, i am looking at two hurricane fans the two 8inch with 745cfm, will this be enough? any other suggestions, i really dont need to filter do i?
http://www.plantlightinghydroponics.com/advanced_search_result.php?keywords=fan&sort=2a&page=2
hears the sit what you think?

Need to know how much lighting you're putting in the room. Then I can answer.

also need height

You know I never thought of that because I'm so used to dealing with basements but you're right. Height is definitely a determining factor when sizing an air handler.

7ft may be, and i am looking to expand my room in the near future.

No one? Thanks, any one please help and thank you

well there isnt enough info tell us lights ambient temp.

jeffblack said:

well there isnt enough info tell us lights ambient temp.

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we would be more then happy to help if you could provide a little more info

how many lights...

with a room that big its hit or miss

This should cover everything you need to know.


http://urbangardenmagazine.com/2010/07/planning-your-grow



J

2 600 watt lights know. may be a third in the future or a light hanger. i am looking to have this on a timer. TYhis looks like it will be suitable, what you think? 8inch fan 745cfm.

what you mean by hit or miss?

scovedog said:

2 600 watt lights know. may be a third in the future or a light hanger. i am looking to have this on a timer. TYhis looks like it will be suitable, what you think? 8inch fan 745cfm.

what you mean by hit or miss?

Click to expand...

if you run cool tubes in series 1 might even do it just to get the air out and away from your girls

i mean hit or mass thats a big grow room either you have a heat problem or you don't

Here's the math.

6x15x7= 630 cubic feet of space. 630CFM fan for once a minute air exchange.

2x600w open reflectors we now need to add 15% of 630CFM for each of your lights. 819CFM so far.

We also need to add 20% of 630 for the restrictive force a carbon filter places on a fan. 948CFM.

So 948CFM fan to exchange air and remove enough of the heat within your area.

If you choose air cooled hoods instead of open reflectors then you only have to add 5% for each light. Now back to 819CFM.


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If you decided to run an air cooled lighting rig I would recommend running 2 fans.

Connect your air cooled hoods in a line and give the system its own intake at one end of the room and an exhaust at the other.

Connect a 500-700CFM fan to this system with ducting. This way no grow room air passes through the lighting rig.

Then you will only need a fan capable of exchanging the air in your room once every two minutes.

So a 400CFM fan and filter to exhaust the room.



Hope this made sense.



J