![]() ![]() ![]() These possibilities are not that hard to do, but do require more work than a simple "fan/light in place of light with existing switch" setup. The better method is to run a separate cable from a switch to the fan, or a cable with two separate switched hots for light and fan from a double-switch. The catch is that this will usually require having the fan on whenever the light is on. Easiest is to either replace an existing ceiling light fixture or splice into the wires (all splices must be inside a junction box, normally with wire nuts inside either the light fixture or fan) and mount near the existing light fixture. There are two things you need for an exhaust fan: So there should be no problem whatsoever piggybacking one onto your existing lighting circuit. A quick search shows plenty in the 20W - 30W range. Based on comments, no window, but leaving this in because it could help others in similar situations.Īn exhaust fan does not need a lot of power. Sort of like a room air conditioner, but much smaller and a lot less energy. If the ventilation from just opening the window doesn't get rid of humidity/odors fast enough, or if the heat in the summer or cold in the winter is a problem, put a fan in the window. If you have a window, use it! That is the easiest solution. Bathrooms are required by the International Residential Code (IRC) to either have an operable window or an exhaust fan.
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