Help! high temps!

[Sweet Inc.]

Yup, the heat's been on many of us lately. Ambient temps being 27C and cab at 32C, 5C higher then normal..,Nutrient evaporation caused nute buildup and other cool things follow...My passive intakes are about 4X the size of the exhaust, today I accidentaly blocked half of them. Temps didn't rise, underpressure in the cab just got stronger. my heavy-ish doors are sucked shut automatically. I'm kinda glad the summer waeather is turning rainy and cold Cooler temps to u all.

 

[Power13]

LISTEN TO FREEZERBOY!

Your intake area is too small. Read that again: YOUR INTAKE AREA IS TOO SMALL.
You also don't need active intake, it's not really going to do much for you in this case except raising your power bill and costing you for the fans themself.

You want between 150% to 200% intake area compared to output area. A 6" circle is
about 28.3 sq-in, a 4" circle is only 12.6 sq-in. So with 2 4" intakes your setup is only about 90% of output area. Add at least one more 4" hole, preferably 2 more. Your fan will move alot more air and it will have to work less than with a choked off intake. (

Also note that for area of circles 2 x 6" circles does not have the same area as 1 x 12" circle...so if you need to add a 4" hole but don't have room for one big one and intend to use several smaller ones, do the math to find out how many you need. To match a 4" dia hole with several 2" holes you'd need:

Area of circle = Pi x radius^2.
Pi = 3.1415

Area of 4" dia = 3.1415 x 2^2= 3.1415 x 4 = 12.6 sq-in.
Area of 2" dia = 3.1415 x 1^2= 3.1415 x 1 = 3.1415 sq-in

12.6 / 3.14 = ~ 4 holes.

I've run many rounds with a 400w air cooled hood in a 20"x30"x70" cabinet with a 6" vortex, and I can stay within 3 deg of ambient, no problem.

DITTO DITTO DITTO

If you don't know enough about air flow physics, let the brainiacs here help you. Biggest thing to high temps, is not enough air flow. Therefore, first I try whenever my temps are too high, would be adding airflow.

 

[punx777]

http://cgi.ebay.com/Frigidaire-5000...QQptZLHQ5fDefaultDomainQ5f0QQsalenotsupported

Heres a nice small cheap A/c for anyone interested!

 

[wavedash]

hey punx im pretty sure you can get a window unit with twice the btu's for not much more.. worth it imo