---
product_id: 20253597
title: "Coates 5.5 Kilowatt Electric Spa Heater - 18,772 BTU's"
brand: "coates"
price: "$2068.53"
currency: USD
in_stock: true
reviews_count: 2
category: "Coates"
url: https://www.desertcart.us/products/20253597-coates-5-5-kilowatt-electric-spa-heater-18-772-btus
store_origin: US
region: United States of America
---

# 5.5 kW power output Operates at 15-80 GPM flow rate 18,772 BTU heating capacity Coates 5.5 Kilowatt Electric Spa Heater - 18,772 BTU's

**Brand:** coates
**Price:** $2068.53
**Availability:** ✅ In Stock

## Summary

> 🔥 Elevate your spa game with precision heating power ⚡

## Quick Answers

- **What is this?** Coates 5.5 Kilowatt Electric Spa Heater - 18,772 BTU's by coates
- **How much does it cost?** $2068.53 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/20253597-coates-5-5-kilowatt-electric-spa-heater-18-772-btus)

## Best For

- coates enthusiasts

## Why This Product

- Trusted coates brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Safety:** Built-in pressure switch prevents dry operation for worry-free use
- • **Durable & Reliable:** Heavy-duty contactors and close differential thermostat ensure consistent performance
- • **Powerful & Compact:** 5.5 kW electric heater fits seamlessly into any spa setup
- • **Efficient Heat Transfer:** Stainless steel tank and Incoloy element maximize warmth with minimal energy waste
- • **Wide Flow Compatibility:** Operates smoothly between 15-80 GPM, perfect for 250-600 gallon spas

## Overview

The Coates 5.5 Kilowatt Electric Spa Heater delivers 18,772 BTUs of efficient heating for spas between 250-600 gallons. Featuring a stainless steel tank and Incoloy heating element, it ensures optimal heat transfer while operating safely within flow rates of 15-80 GPM thanks to its built-in pressure switch. Compact and durable, this heater is designed for reliable, energy-efficient spa comfort.

## Description

Coates ST-Series heater is a compact electric spa heater that is available in a 5.5kW or 11kW version. The 12406ST is equipped with a flow switch that allows operation at flow rates of 15GPM to 80GPM. The stainless steel tank is designed to optimize heat transfer by efficiently directing the water flow over the Incoloy heating element.

Review: High Quality Product - A high quality product that was shipped a few days faster than the expected delivery date.
Review: Excellent product - Easy replacement for older model. Clear information to install.

## Features

- Dimensions: 17.5 inches L x 4 inches W x 14 inches H
- 18,772 BTU output for 250-600 Gallons
- Operates at flow rates from 15-80GPM
- Built-in pressure switch prevents operation when there is no water flow
- Stainless steel tank, Incoloy heating element, close differential thermostat and heavy duty contactors

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008B9J0XA |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #903,658 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #432 in Swimming Pool Heaters |
| Color | Multicolor |
| Customer Reviews | 5.0 5.0 out of 5 stars (5) |
| Date First Available | May 12, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 18.6 pounds |
| Item model number | 12406ST |
| Manufacturer | COATES ELECTRIC HEATERS CO |
| Part Number | 12406ST |
| Power Source | corded electric |
| Product Dimensions | 22.5 x 15.3 x 4.5 inches |
| Size | 240 |
| Voltage | 240 Volts |

## Images

![Coates 5.5 Kilowatt Electric Spa Heater - 18,772 BTU's - Image 1](https://m.media-amazon.com/images/I/116J6+H7CJL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ High Quality Product
*by M***T on November 17, 2025*

A high quality product that was shipped a few days faster than the expected delivery date.

### ⭐⭐⭐⭐⭐ Excellent product
*by T***H on December 20, 2018*

Easy replacement for older model. Clear information to install.

## Frequently Bought Together

- Coates 5.5 Kilowatt Electric Spa Heater - 18,772 BTU's
- Taylor Replacement Reagent R-0870-J DPD Powder .25-Pound
- Coates Flow Switch 1-2in. Q-12Ds 23000105

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-04*