Is 400 CFM enough for evap cooling?

[saltycrab]

I found a good deal on a 120mm fan from directron.com:
Masscool 120mm, .13A, 25dBa, 52 CFM, Wire coating, $4.99 each.
My new tank is going to be setup in the garage so Im going to try using 8 of these over the sump. The current draw is so low that it should be a great deal if it can cool the tank 10-20 degrees. Im going to run it off a Ranco dual stage that I just ordered for $75. I will let everyone know how it works in a week.

 

[coraljunky]

400 cfm is overkill. That's equivalent to 1 ton of cooling from an air conditioner. More than the air blowing out of the a/c vent in your bedroom.

 

[coraljunky]

What's the max temperature in your garage? Is it air cond?

 

[saltycrab]

My garage doesnt get that hot actually maybe 95 degrees (guess). I realize that 400 CFM is total overkill so Im going to test out the system with freshwater and the 8 fans and find out how fast the 8 fans can drop the temp on 300 gallons and how much evaporation occurs to keep the tank at 80 degrees. More than likely I will end up taking off fans. I might just put half on a toggle switch. The garage doesn't have ac or circulation, just flood vents on the garage door. I want to hook up a small blower to evacuate the air so humidity doesn't build.

 

[coraljunky]

Are you going to do the test run with the lights on it? Fans won't change the level of humidity, unless you are exchanging fresh air with a less humid source. I'm not trying to be a know all-it's my business

 

[saltycrab]

Hey what do you know about your business anyways

. Im going to be testing out the temp of the tank before I run the lights but they will heat the tank a few degree so Ill just have to keep that in mind until I can come up with the 400 that my lights will cost

. Do you think a blower set in my attic sucking air through the garage sealing (I will have to install a vent) and blowing out the eave will work for ventilation? Like I said it would be able to pull fresh air from the bottom of the garage door.
hmm I was just thinking, what if their is 90 or 100% humidity. err I might need a back up chiller.

 

[coraljunky]

It should help. My only concern is this time of year with high humidity. I closed in part of my garage for a frag system last year. The room is around 70 sq/ft. I use a 9000btu widow shaker(a/c) and set it for 84 degrees. This keeps my system cool and the room dry. The a/c unit cost around $110. I know your going to say "it costs more money to run than fans" but now I don't sweat when I frag

 

[saltycrab]

Can I rent some space, say 15 square feet?

Ya if it was my house I would AC the entire garage and fill it with frag tanks. I think a 1/3 HP chiller may be in my future.