How to install an electric radiant heater with This Old House

Watch this video from This Old House to learn how to install an electric radiant heater.
Steps:

1. Start by having a licensed electrician test the radiant heat mat to ensure it’s working properly.
2. After preparing the subfloor for tile, use a trowel to spread thinset mortar onto the tile backerboard.
3. Press the radiant heat mat into the mortar, then spread another layer of mortar on top and set the ceramic tiles.
4. For plywood subfloor, some radiant heat mats can be stapled down without a setting bed of mortar; check with the manufacturer.
5. Have electrician install a dedicated GFCI-protected circuit to the radiant heat mat.
6. Install a thermostat with automatic timer to control the radiant heat.