[I agree with Brian, the Icecap ones are 2-3 times the price of a Radio Shack fan but I've had my Icecaps for 3+ years (still as quiet as day 1) and my Radio Shack ones never lasted more than 8 months before they started making all sorts of noise. I have had 3 of the Radio shack ones in the past all with the same outcome ( I dont think they fair well with the salt).]