Coates 12411ST Electric Heater; 11 kW; 1-Phase; 240 V; 46 A This Coates electric spa heater is built for reliability and efficiency. It’s designed for spas and hot tubs with a circulation pump, operating safely between 15–70 GPM. The built-in flow switch prevents dry firing when water isn’t flowing. Its stainless steel tank and Incoloy heating elements maximize heat transfer for fast, even heating. The adjustable thermostat lets you set temperatures from 65°F to 104°F, and the unit can be installed indoors or outdoors. Includes 1.5" and 2" union connections for easy setup. Incoloy heating elements Digital thermostat Manual reset high temp limit Flow switch Heavy-duty contactors Element “on” light 1-1/2 x 2″ union connections for PVC pip Stainless steel manifold Specifications: Amperage Draw 46 A Brand Coates Cabinet Depth 14 Inch Cabinet Height 17-1/2 Inch Cabinet Width 4 Inch Flow Rate 15 - 80 gpm Heat Output 11 kW Heat Output BTUH 37,543 Item Electric Heater Maximum Breaker Size 60 A Phase 1 Phase Series ST Voltage Rating 240 V Water Connection 1-1/2 Inch x 2 Inch Union Wire Size 6 AWG Please note: Coates heaters are made to order and ship on a first-come, first-served basis. Please allow 2–4 weeks for delivery.