Probably the most desired choice on the market for today is small radiators that are attached to the ceiling in order to radiate heat throughout the bathroom so that it can remain nice an warm when your done. There are many options however this is the most popular one for many reason it can often be the most cost effective and can last several years. Another great advantage of using this is that since it is a radiator I can be services quite easily. As you know it can keep your bathroom as warm as you want plenty warm to keep out the cold air in the bathroom.
Another great option is something called radiant strips they are the second best choice. Both of the choices are excellent with small kids they are very safe options for heating your bathroom. Another great thing about the last two options is that they heat up probably faster than any other option on the market. These are great for the electric bill because instead of trying to warm the whole house to a warmer temperature you can only heat up the bathroom which is far less space and will take a lot less energy to do so partially if it is a small bathroom.
Another great method of heat a bathroom that can be a little more expensive is to run heated pipes threw the walls and in the ceiling also to install 4 heat lamps that should heat up almost every bathroom.
Like every option the two main one demonstrate in this article are controlled like the big unites with some forum of remote be that in the wall or external. It is possible for you to adjust the temp and the time that the unite what ever you choose will run for as long as you tell it to. i wish you the best of luck on you way of buying a nice bathroom warmer.