Immersion Water Heaters

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What Is an Immersion Water Heater?

An immersion water heater is an electric heating element that is directly submerged in water to quickly and efficiently raise the temperature. It’s a simple and effective solution for on-demand hot water.

Best Immersion Water Heaters for Every Need

Looking for reliable performance? We carry some of the best immersion water heaters for home, commercial, and industrial use—known for safety, durability, and fast heating.

Why Choose an Electric Immersion Water Heater?

An electric immersion water heater is easy to install and doesn’t rely on gas lines. It’s a great option for quick water heating in sinks, tubs, or backup applications.

Compact and Easy to Use

Immersion water heaters are compact and portable, making them ideal for travel, cabins, or small apartments. Just plug in, place in water, and heat—no complicated setup needed.

Energy-Efficient and Reliable

These heaters offer excellent energy efficiency by directly transferring heat to the water. They’re an affordable and effective solution for those needing hot water without a full water heating system.

Shop Quality Immersion Water Heaters

Browse our collection to find the right immersion water heater for your needs. Our team can help you choose the best model for your home or project.

Frequently Asked Questions

  • Higher electricity costs: They typically cost more per kWh than gas or heat pump systems.
  • Energy inefficiency: Without proper timing and insulation, water cools down and needs reheating, increasing energy use.
  • Limited hot water supply: Only heats the water in the tank—once it runs out, you'll wait to reheat.
  • Scale buildup: Mineral deposits can form on the element, reducing efficiency and lifespan.

Yes. Most models draw around 3 kW per hour, costing approximately £0.50–0.82/hour depending on your electricity rate. Leaving it on continuously—common without a smart timer—can significantly increase energy bills.

Generally no—it's more expensive than gas, heat pumps, or solar thermal systems . However, you can save by using timers to heat during off‑peak hours (like Economy 7 or "solar sponge" tariffs) and improving insulation.

To raise water by 40 °C (for example, from 10 °C to 50 °C):

  • Heating 100 L is approximately 4 kWh of energy.
  • A 3 kW immersion heater will take around 1 hour and 20 minutes of continuous operation (3 kW × 1.33 h ≈ 4 kWh).
  • A full 120 L cylinder costs around €1.30/day (about £1.10) on typical EU electric tariffs.
  • In the UK, 3 kW over 2 hours daily is ~£0.50/h × 2 h = £1/day, translating to roughly £360/year.

Yes - especially in homes without gas supply (e.g. studios or flats). They're simple, easy to install, and serve as backups or primary heaters where other systems aren’t available.

Yes, when properly installed and submerged. However, portable units not fully immersed can overheat and pose fire hazards. Some models (e.g., HAIYEATBNB) were recalled in the US in Jan 2025 due to burn/fire risks U.S. Consumer Product Safety Commission. Always choose certified, thermostatically controlled models and adhere to safety guidelines.