Coates ST Series Electric Spa Heater 11KW, 240V, 46A, 12411ST

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Important Notes About Ordering Coates Heaters

Coates heaters are a made-to-order product. When you order your Coates heater from E-Z Test Pool Supplies, we'll confirm a lead time with the manufacturer which typically can range up to 6-10 weeks.

E-Z Test Pool Supplies cannot fulfill orders for Coates heaters in the following states: Washington, Oregon, Idaho, California. Any orders placed within these states will be canceled and refunded.

Coates 12411ST Electric Heater; 11 kW; 1-Phase; 240 V; 46 A

The built-in flow switch prevents operation when there is no water flow and allows operation at flow rates between 15GPM and 80GPM. The stainless steel tank is designed to optimize heat transfer by directing the water flow over the incoloy elements efficiently.

Coates 12411ST Electric Element Spa Heater - 11 kW, 230V is intended for use on spas and hot tubs with a forced water circulation system. The water flow through the heater should be at least 15 GPM but should not exceed 70 GPM. Higher flow may damage the heater.

The Coates Spa Heater is suitable for indoor or outdoor installations. The heater should be secured to a smooth, flat surface. The Heater has a temperature controller adjustable from 65 F to 104 F. The Coates Spa Heater's stainless steel tank is designed to optimize heat transfer by efficiently directing the water flow over the electric heating element. The Coates Spa Heater has 1-1/2" and 2" union connections


  • 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


AmperageDraw 46 A
Brand Coates
CabinetDepth 14 Inch
CabinetHeight 17-1/2 Inch
CabinetWidth 4 Inch
FlowRate 15 - 80 gpm
HeatOutput 11 kW
HeatOutputBTUH 37543
Item Electric Heater
MaximumBreakerSize 60 A
Phase 1-Phase
Series ST
VoltageRating 240 V
WaterConnection 1-1/2 Inch x 2 Inch Union
WireSize 6 AWG


Install Guide

Technical Info


Operational Manual