Coates 240V Electric Spa Heaters | 5.5kW / 11kW | 12406ST / 12411ST

Price range: $866.99 through $955.99

Choose Coates 12406ST (5.5kW, 23A) or 12411ST (11kW, 46A), both 240V single phase. Confirm the model and electrical requirements with your installer before ordering.

Request Florida spa heater installation pricing and sizing help or call 877-650-7665. Include your city/ZIP, contact details, spa dimensions, current heater, equipment-pad details, electrical supply and desired temperature/use. Service is confirmed by ZIP; installation is quoted separately from equipment. Equipment-only ordering remains available.

Earn up to 9,560 Points.

  • ✓ Free ground shipping on orders over $300 ($7.99 under $75, $14.99 to $299.99)
  • ✓ Free in-store pickup at 14701 Walgreens Dr, Jupiter, FL
  • ✓ Free local delivery on $299+ in Palm Beach, Martin and St. Lucie counties
  • ✓ Low price guarantee against any authorized dealer
  • ✓ Sold and supported by licensed Florida pool contractors

Questions Before You Order?

Talk to a real pool guy before you order. Have your current brand and model number, or a photo of the equipment label, and we will confirm the fit. We install this equipment every week in South Florida.

Call 1-877-650-POOLS or send us your product question.

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Coates ST Electric Spa Heaters: 5.5kW and 11kW Models

Choose the 12406ST (5.5kW, 23A) or 12411ST (11kW, 46A). Both are 240V single-phase electric spa heaters. Have a qualified installer verify the selected model’s electrical supply, circuit requirements and water flow against the installation manual before ordering.

Standard Features

  • Incoloy heating elements
  • Digital thermostat
  • Manual reset high temperature limit
  • Flow switch
  • Heavy-duty contactors
  • Element “on” light
  • 1-1/2 x 2″ union connections for PVC pipe

Technical Data

  • Dimensions: 17.5″ L x 4″ W x 14″ H
  • UL Listed: Rated for indoor and outdoor installation

Model Specifications

  • Model Number: 12406ST
  • Kilowatts: 5.5
  • Voltage: 240
  • Phase: Single
  • Amps: 23
  • BTUs/hr: 18,772
  • Shipping Weight: 19 lbs
  • Model Number: 12411ST
  • Kilowatts: 11
  • Voltage: 240
  • Phase: Single
  • Amps: 46
  • BTUs/hr: 37,543
  • Shipping Weight: 19 lbs

Additional Details

Check water-system compatibility before ordering: the Coates ST manual excludes saltwater systems, including systems that generate sanitizer from salt. Confirm compatibility with your installer and follow the model-specific water-chemistry requirements.

This compact electric spa heater is available in 5.5kW and 11kW versions. Both models include a flow switch for safe and efficient operation and use a stainless steel tank to guide water evenly across the heating elements for optimal performance.

Guides and Documentation

Additional information

Weight 18 lbs
Size

12406ST 5.5kW, 12411ST 11kW

Brand

Coates

$3,699.00

Add to cart

$849.00

Add to cart

$2,199.00

Add to cart

$799.99

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