50 Sqft Mat, Electric Radiant Floor Heat Heating System with Aube Digital Floor Sensing Thermostat 50 Square Foot Under Tile Heating Mat, Mat is 20 Wide x 30 Long, 120 Volts Mat has double sided tape (Adhesive Backing) to stick to floor. Lays FLAT for easy installation. Highest Quality Heating Cable (1/8 thick), Zero EMF, 10 long Cold Lead. Mesh can be cut (do not cut red heating wire) and flipped and turned to heat any shape. Includes Honeywell/Aube TH115-AF-120S Digital Floor Sensing Thermostat and Sensor. Also Includes INSTALLATION MONITOR that will alarm if mat is damaged during installation. MADE IN THE USA, UL Listed for USA and Canada, Call us is you have questions. Carefully calculate the square footage of the area to be heated.  Do not include permanent objects or areas that are not walked on.  Purchase the corresponding heating system size. Simply unroll the floor heating mat with the cold lead running up the wall to the electrical box. The adhesive tape on either side of the mat allows the mat to stay in place and lay flat.  You can manipulate the mat to fit the desired heating area by using the turning techniques shown below. Install the mortar and tile over the top of the heating system. Connect the floor heating thermostat. AF mode-controls ambient temperature with floor temperature limitation A mode controls the ambient air temperature F mode controls the floor temperature using an external temperature sensor Two temperature sensors-one in floor, one in thermostat for accuracy and security Red light and alarm indicates lead wires have come loose from the terminals or damage has occurred to the heating system A white light indicates the monitor is operating Can monitor up to 3 systems at one time when they are temporarily connected in series