King Electric WSC 120-Volt 1000-Watt/500-Watt Outdoor Rated Surface-Mounted Plug-In Wall Heater w/SP Thermostat & 6 ft. Cord, White WSC1210-T 15-15P 6FT - The Home Depot
Amazon.com: Zerodis PTC Thermostat Heater Plate, Constant Temperature Air Heater High Power PTC Heating Element 220V 50W / 80W / 110W(80W 150) : Home & Kitchen
Rheem Commercial Heavy-Duty 50 Gal. 480-Volt 18 kW 3 Phase Electric Surface Thermostat Tank Water Heater ES50-18-G-1 480 Volt 3 Phase - The Home Depot