35 Sqft Cable, Warming Systems 120 V Electric Tile Radiant Floor Heating Cable with Programmable Thermostat 35 Sqft Cable with Thermostat, Electric Floor Heat Warming System Includes Aluminum Tape to Secure to Floor 120V, 3.5 Amp, 120W, 12 Watts/Sqft, UL LISTED for USA and Canada Honeywell/Aube Thermostat # TH115-AF-120S, Includes floor sensor Made in the USA using the highest quality materials, Single Cold Lead, Zero EMF. "Life of the floor Warranty" 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 attach the cable guides to the floor at the boarder of the heated area.  Run the heating cable back and forth 3&#034; apart across the heated area looping it around the cable guides. 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