Coates 12406ST ST Series 5.5 kW electric spa heater, 240VCoates 5.5 kW ST Series Electric Spa Heater, 240V, 12406ST In stock$88799
Coates 12406ST ST Series 5.5 kW electric spa heater, 240V
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Coates 5.5 kW ST Series Electric Spa Heater, 240V, 12406ST

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$88799
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Quick overview

  • 5.5 kW output 18772 BTUH of heat from a 240 volt single phase supply.
  • Compact cabinet 4 inch wide by 14 inch deep by 17-1/2 inch high, so it fits where a gas heater will not.
  • Union connections 1-1/2 inch by 2 inch unions for PVC pipe, so the heater comes out without cutting.
  • Wide flow range Rated for 15 to 80 gpm.
  • Electric, no gas line No flue, no gas run and no combustion air to plan for.
  • Circuit sizing is known 23 amps draw, 30 amp maximum breaker, 10 AWG wire.
Full description and specifications ↓

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Product details

The Coates 12406ST is an ST Series electric spa heater rated at 5.5 kW, or 18772 BTUH, on a 240 volt single phase supply.

Electrical

The heater draws 23 amps, takes a 30 amp maximum breaker and is wired with 10 AWG. That is a dedicated circuit, and it is the item worth pricing before the heater, because the run from the panel is often the larger part of an electric heater install.

Plumbing and flow

Water connections are 1-1/2 inch by 2 inch unions for PVC pipe, so the heater unions off the line for service rather than being cut out. The rated flow range is 15 to 80 gpm, which covers the pump sizes normally found on a spa or small pool.

Size

The cabinet is 4 inch wide, 14 inch deep and 17-1/2 inch high. A gas heater of comparable duty needs a flue, combustion air and a gas run. This one needs a circuit and two unions, which is why electric is the usual answer on tight equipment pads and indoor spa rooms.

Specifications
Brand Coates
Manufacturer part number 12406ST
Type Electric spa heater
Power 5.5 kW
Heat output 18,772 BTU/hr, by Coates
Electrical 240 V, single phase, 23 A
Water connections 1-1/2 in x 2 in unions for PVC pipe
Dimensions 17-1/2 in long, 4 in wide, 14 in high
Shipping weight 19 lb
Heating elements Incoloy
Tank Stainless steel
Controls Digital thermostat, manual reset high limit, flow switch
Flow rate 15 to 80 GPM
Listing UL, indoor or outdoor
Ships Parcel

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Questions and answers

What people ask about this product, answered by our pool techs.

What electrical supply does the Coates 12406ST need?
240 V, single phase, 23 A, by Coates's table for the 12406ST. Have an electrician confirm the panel, breaker and conductors before ordering.
Can the Coates 12406ST heat a pool?
Coates sells the ST series as spa heaters, at 18,772 BTU/hr for the 12406ST. Its pool heaters start at 12 kW in the CE series.
What flow does the Coates 12406ST need?
15 to 80 GPM. The built in flow switch stops the heater when there is no flow.
What controls does the Coates 12406ST have?
A digital thermostat, a manual reset high limit and a flow switch, all built in. Coates gives the working flow range as 15 to 80 GPM.
Can the Coates 12406ST be installed outdoors?
Yes. It is UL listed for indoor or outdoor installation.
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