We have done several bathrooms recently where the clients have decided to use an under-tile floor heating system. This product consists of a mesh mat interwoven with heating wires, which is controlled by a wall-mounted thermostat. The heat mat is placed in the tile setting material before the ceramic tile is put in place. The installation must be coordinated with an electrician who has to connect the heat on a dedicated circuit and install the thermostat.
This product is typically used in bathrooms, but can be used anywhere ceramic tile flooring is installed. It does not put off enough heat to be the only heat source in the room but is typically used as a comfort element to warm the chilly ceramic tile in the winter. Many of the thermostats are equipped with a timer so the heat can be set to come on prior to using the bathroom in the mornings. After the mat has been installed it should function for many years to come. Most of the manufacturers have a warranty included for their product.
The main drawback of using this system is cost. Depending on the size of the bathroom, this can add $1,000 or more to the cost of a project. This includes the cost of the materials, the installation and the electrical connections. But if you can find room for that item in your bathroom remodeling budget you should have warm feet for many years to come.