So last night, I got to mount up my duel electric fans, and bench tested the wiring for it. I didn't want to have both fans turn on at the same time drawing maximum current. I purchased a variable "timer on" relay, and hooked it up to turn my 2nd fan on 10 seconds after the first. Not certain if this topic was covered before, but figure I'd post this up to help anyone out in the future who might be interested. This is a relay only, so if you thought about trying it, no need to re-wire anything...just plug in this relay, and set the delay to your needs. Here is a You-tube link of the bench test. Here is where I got the relay from This is the item number. It is adjustable from 1 second to 1 minute.