---
product_id: 26486459
title: "Whale Marine S300W Whale Seaward 3 Gallon Hot Water Heater W/side Heat Exchanger - White Epoxy - 120v - 1500w"
brand: "whale seaward"
price: "$1802.18"
currency: USD
in_stock: true
url: https://www.desertcart.us/products/26486459-whale-marine-s300w-whale-seaward-3-gallon-hot-water-heater
store_origin: US
region: United States of America
---

# 1500W powerful heating Lightweight 14 lbs aluminum build Precise 140°F thermostat control Whale Marine S300W Whale Seaward 3 Gallon Hot Water Heater W/side Heat Exchanger - White Epoxy - 120v - 1500w

**Brand:** whale seaward
**Price:** $1802.18
**Availability:** ✅ In Stock

## Summary

> 🚤 Hot water that keeps you cruising in comfort and style!

## Quick Answers

- **What is this?** Whale Marine S300W Whale Seaward 3 Gallon Hot Water Heater W/side Heat Exchanger - White Epoxy - 120v - 1500w by whale seaward
- **How much does it cost?** $1802.18 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/26486459-whale-marine-s300w-whale-seaward-3-gallon-hot-water-heater)

## Best For

- whale seaward enthusiasts

## Why This Product

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

## Key Features

- • **Dual Heat Source Efficiency:** Side-mounted double-walled heat exchanger allows seamless integration with your boat’s engine heat, maximizing energy savings.
- • **Sleek, Seamless Integration:** White epoxy finish blends effortlessly with marine equipment, adding a modern, clean look to your vessel’s setup.
- • **Precision Temperature Control:** Thermostat-regulated heating maintains a consistent 140°F, ensuring safety and comfort without guesswork.
- • **Effortless Hot Water On Demand:** Stay comfortably warm with a robust 1500W electric heating element that heats water quickly and efficiently.
- • **Lightweight & Corrosion-Resistant:** Crafted from coated aluminum, this 14 lb heater resists corrosion and saves precious boat weight for optimal performance.

## Overview

The Whale Marine S300W is a 3-gallon, 120V marine water heater featuring a 1500W electric element and a side-mounted double-walled heat exchanger. Weighing only 14 lbs with a corrosion-resistant aluminum body and white epoxy finish, it delivers precise 140°F temperature control, making it the perfect lightweight, efficient hot water solution for your boat.

## Description

The Whale S300W 3 Gallon 120 Volt Marine Water Heater with Heat Exchanger has a side mounted, doubled walled, combination electric/heat exchanger. Whale's 11 ltr (3 US Gal) heaters are the lightest water heater at 14 lbs, saving your boat weight on board. The white epoxy coating blends in well with your existing equipment, and the coated aluminum material offers corrosion resistance and weight saving. See below for additional details and more information.

## Features

- Thermostat regulates electric heating element temperature at 140 degrees F.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01C8Z3UKQ |
| Best Sellers Rank | #1,225,759 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,722 in Water Heaters |
| Brand | Whale Seaward |
| Brand Name | Whale Seaward |
| Capacity | 3 Gallons |
| Color | White |
| Customer Reviews | 4.0 out of 5 stars 1 Review |
| Item Depth | 17.5000 |
| Item Dimensions W x H | 17"W x 15"H |
| Item Weight | 23.4 Pounds |
| Manufacturer | ATTwood |
| Manufacturer Part Number | S300W |
| Material Type | Aluminum |
| Maximum Temperature | 140 Degrees Fahrenheit |
| Mount Type | Wall |
| Power Source | Battery Powered |
| Product Dimensions | 17"W x 15"H |
| Style Name | Modern |
| UPC | 682500933554 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts |
| Wattage | 3000 watts |

## Product Details

- **Brand:** Whale Seaward
- **Product Dimensions:** 14.5"W x 13"H
- **Color:** White
- **Wattage:** 3000 watts
- **Voltage:** 120 Volts

## Images

![Whale Marine S300W Whale Seaward 3 Gallon Hot Water Heater W/side Heat Exchanger - White Epoxy - 120v - 1500w - Image 1](https://m.media-amazon.com/images/I/61hxFVRz6rL.jpg)
![Whale Marine S300W Whale Seaward 3 Gallon Hot Water Heater W/side Heat Exchanger - White Epoxy - 120v - 1500w - Image 2](https://m.media-amazon.com/images/I/51ooVcSWLZL.jpg)

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**Shop now:** [https://www.desertcart.us/products/26486459-whale-marine-s300w-whale-seaward-3-gallon-hot-water-heater](https://www.desertcart.us/products/26486459-whale-marine-s300w-whale-seaward-3-gallon-hot-water-heater)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-13*