There are several options available when looking at how to keep your Addroom warm. Firstly, if you are only planning to use your Addroom occasionally, we would recommend putting in a small electric heater in the Addroom. Usually, you would turn that on 20 minutes before you are going to use it to kill off the chill.
However, if you are planning to use your Addroom all year round for either business purposes or a play area etc, you may want to consider the option of an isolated heating system.
Remember, our Addrooms are highly insulated for year-round use. See our features tab for more information.