? on cfm amount for 6k

[Mr Celsius]

Im wondering if 1000cfm inline-fan will be able to cool an 8'x16'x8' room with 6 1000's in non-ac hoods. My intake temps are around 60 degrees F.

Related question: What are the cheapest hoods out there that will still do a good job? Are batwings decent? I normally don't skimp on materials, but this grow has to be extremely economical.

Thanks in advance

 

[yamaha_1fan]

Hers some info from the OG FAQS. According to this you need a fan 3-5 times bigger or 3-5 fans. Your room is 1024 cubic feet and it suggest changing the air over 3-5 times a MINUTE.

Remember to make an intake that is twice the size of your exhasut.


For that much lighting, and to be more efficient in the future, I would try to aircool them.


Added by: MedMan Last edited by: MedMan Viewed: 45 times Rated by 14 users: 8.71/10
Each fan has a rating that tells you how many cubic feet of air per minute (CFM) it will move. When dealing with above average temperatures you will want your fan to exchange the grow room air 3-5 times in one minute, so for a room that is 40 cubic feet, a fan that is capable of moving 120-200 cfm (cubic feet per minute) is recommended. If you only want to replace depleted levels of co2 and are growing in a closet using fluorescents, one room change per five minutes (divide room size by 5) will be adequate.

To calculate your room size, multiply Width by Length by Height, this will give you the CFM rating required for one room change per minute.

Air that’s exhausted will be replaced by fresh air, which is drawn from
Passive Intakes-

located opposite the exhaust at the floor of your grow room (Recommended for closet grows) or forced in using another blower (recommended for larger grow rooms).

For internal circulation oscillating fans are In my opinion the most efficient devices for circulating air in a room. The gentle back and forth sway of the fan is very beneficial for the developing plants. These fans tend to keep anaerobic moulds down by constantly freshening any potentially stagnant air. Home improvement centres carry a large array of various types and styles of air-moving fans, there are wall-mounted styles available and most are relatively inexpensive.

NOTE: To convert CFM to CMH use the folowing formula CFM X 0.03 X 60 = CMH

 

[Mr Celsius]

Thank you but that this formula does not take into account other variables; such as, how many btu's you are producing from heat sources. If I had a room the same size with only 1 - 1000w lamp, would I still need to exchange the air 3-5 times every minute? Also, conversely, if I had 12 - 1000w lamps, would I still need to exchange the air every 3-5 times a minute?

I appreciate your help. Unfortunately it doesn't quite answer the question at hand.

 

[Albert Hofmann]

With 60 degree DRY intake air and that fan pulling non stop and assuming the dehumidifier isn't running all the time...you might be ok, but you're pushin it. Given your space size and wattage you really need to look at Northern Farmers stadium setup...those rooms are easier to cool.

http://www.icmag.com/ic/showthread.php?t=57927&highlight=northern+farmer

peace

 

[Mr Celsius]

Thanks for the reply.

How is Northern Farmers setup different? The size of room?

 

[Albert Hofmann]

The room being long and narrow and the plants going up both sides creates a wind tunnel effect...plus with the lights hanging down they are easier to cool.

 

[Mr Celsius]

Thanks, I'll consider that design. I've been following it for a while now and am quite familiar with how it works. I have considered it in the past... but maybe it will work with what I'm doing. Regardless, thank you for your time Albert & yamaha. K+ for both