DIY chiller using CPU Fans

adamc1303

Active Member
It's that time of the year and I keep seeing threads started about lower temperatures in tanks and different ways to get it done. I used the "fan methods" basically fans blow air across the water which causes evaporation and in term causes the temp to drop. I purchased these fans off a famous site for $25.00 for a set of 2 including shipping I actually bought 2 sets. I just used a wire hanger because it is what I had lying around to hang them. I untwisted the hanger and then basically put is through the holes that are found at the corners of the fans. I bent it into a shape that has it hang on my canopy at a 90 degree angle so it blows across the water surface. Last year I drilled my canopy to mount them they were always in my way since they were mounted to the canopy. Every time I wanted to remove my canopy I would have to disconnect the wires so this year I used a better system. I didn't need to drill my canopy and the fans are on a better angle and can easily be removed because they are just hanging on the canopy. Anyway here are the best pics I could take to show what I did, you can probably go to staples or to a radio shack and buy the CPU fans and wire them yourself for cheaper than $25.00. My temp hit 88 degrees on Saturday I put these in on Sunday and by the end of the day the temp went down to 81 then eventually lower. I set my heater at 79 so it basically stays around there give or take .5 degrees. It was cheaper than a chiller and it works great. I hope I can help someone out with this thread. Here are the pics!



 

thegrog

Active Member
nice work!

The only feedback I would have is to watch the wire hangers as the salt mist could corrode them. Make sure the plastic coating is intact on them.
 

tat2d

Member
If those aren't enough, you can always do what I did and put a bathroom exhaust fan behind the canopy, and duct it through the wall
Two 4 1/2 inch cpu fans(blowing into the canopy) and the bath fan, and I'm always at 80 or below, depending on how warm the house is.
Bobby
 

indymatt

Member
I bet that bathroom exhaust fan moves some air!
Hopefully, I won't have heat issues as it will be in our basement where it is a nice 68 degrees year round, even in the 90 degree heat we've had.
 

stingrayjs

Member
Whats the volt rating on the fans? I see you have a transformer there powering the fans, and did that come with the fans or did you just purchase it or had it laying around already? I would love to set something like that up being I don't have the money for a chiller.
 

adamc1303

Active Member
Everything came together plug and play, the voltage is 12V output on the tranformers 1 transformer runs 2 fans.
 

tat2d

Member
You can also go to an electronics/computer parts store locally and get 120v plug and play fans for btween 10 and 20 dollars each. I have 2 of the 5 inch ones(i just measured them and I posted the wrong size earlier), and they move massive amounts air. Still working on a diy temp controller for them. I have them on a timer now, but they could be more energy efficient. Here's a pic.
Bobby
 

theappe

Member
i really need to consider doing that. My temp got really high today. Im gonna check tigerdirect or newegg and install them in my canopy as "exhaust fans" to remove the heat from inside the canopy.
 
Top