I like this device. Didn't realize it used the water side for heat dissipation until I ordered it, my fault for not reading the reviews. I was hoping to cool the water and run it through the tubes in my vest to keep me cool on the bike. It cools the water for a short time, but the aluminum heat sink is not enough to dissipate the heat and the water warms up after a short time. It does its job well if it's working as intended to cool the air as long as you have a cooler to cool the water. He's well built. I ordered a 160x40 liquid cooling block with 4 TEC1-12706 blocks like this one and another liquid cooling block for heat dissipation with a 240mm PC cooler (2 fans) for cooling. Liquid. uxcell Aluminum Computer CPU 18 Tubes Water Cooling Heat Exchanger Radiator 270mm Long Black Hope this matches my vest. I'll use it to cool my worm farm or something.