yea the belt driven fan runs all the time, true, i was speaking of factory electric fans, I have also had fan clutches go out on me and not cool at low speeds and overheat the engine, anything mechanical is prone to failure. Electric is the way to go and adapting a factory unit is the way to go, car companies pay millions of dollars for engineering you might as well take advantage of it, I do not care for any aftermarket fans though, they are usually pretty cheap and don't have nearly the cooling power.