After much success with their residential doormat, HeatTrak has introduced two larger versions for industrial/businesses.

HCM40-5IB 40in x 5ft Heated Entrance Mat

HeatTrak Industrial Snow Melting Mat – 40 inch x 5 ft – 120 Volt, 612 Watt, 5.1 Amps – 6 foot Power Cord – In Line GFCI (Ground Fault Circuit Interrupter) Safety Device
https://morelectricheating.com/default.aspx?page=item+detail&itemcode=HEATTRAK10131

HCM30-4IB 30in x 4ft Heated Entrance Mat

HeatTrak Industrial Snow Melting Mat – 30 inch x 4 ft – 120 Volt, 384 Watt, 3.2 Amps – 6 foot Power Cord – In Line GFCI (Ground Fault Circuit Interrupter) Safety Device
https://morelectricheating.com/default.aspx?page=item+detail&itemcode=HEATTRAK10130