When you buy a bathroom fan, you obviously want to be able to use it as soon as possible. The quickest way to do that is to install it yourself, of course. But how do you actually do that? In the step-by-step plan below, we explain in a simple step-by-step manner the best way to do so. We also have an instructional video that you can watch below! In the step-by-step plan below, we also explain how to install bathroom ventilation with timer and humidity sensor.