How much power does the HONGGE 18kW need?

It runs on 240V and draws about 75 amps at full output, so it needs a dedicated circuit with heavy-gauge wiring. A licensed electrician should confirm your panel can carry that load.

How many showers can it run at once?

At 18kW it handles one shower comfortably in most climates. Running a shower and a hot tap together in cold incoming water can drop temperature, so stagger heavy use.

Does it work with hard water?

The cast aluminum element separates water from the electrical parts, which helps resist scale and corrosion. In very hard water, periodic descaling still extends its life.

What water connections does it use?

It connects with standard 1/2 inch NPT fittings. It activates at a minimum flow of 0.39 GPM, so low-flow fixtures still trigger heating.

What temperature range can I set?

The LED touch screen sets output from 86 to 140°F. A built-in thermostat holds shower temperature steady.

Is it a good fit for a rental or quick DIY swap?

No. It needs assembly, wall mounting and a dedicated high-amp circuit, so it suits owned homes where an electrician can do the install.

Where can I buy the HONGGE 18kW Tankless Electric Water Heater?

2 stores we checked sell it, including eBay, JCPenney.

HONGGE 18kW Tankless Electric Water Price History: Lowest $99.00

Q: Where is the HONGGE 18kW Tankless Electric Water Heater cheapest?

At eBay, for $99.00, as of our latest check.

From JCPenney

Delivers hot water in seconds without the wait or bulk of a storage tank
Cast aluminum heating element separates water from electricity for scale and corrosion resistance
Heats water to a range of 86-140°F at a minimum activation flow of 0.39 GPM
LED display with IMD touch screen for precise temperature setting
Built-in thermostat and over-temperature protection keep shower temperatures steady
Wall-mount design saves space; connects via 1/2 inch NPT water fittings

Sizes: 18kw
Materials: 100% ABS base material
Sizing: Installation calls for a 40A circuit breaker and 10AWG power cable; professional installation is recommended.
Care: Wipe clean with a damp cloth. Do not immerse in water.
Returns: Third-party seller items may be returned per the Marketplace Returns Policy, subject to some exclusions.
Shipping: Third-party seller items ship directly from the seller; methods, delivery timing and availability may vary by seller and item.

About the HONGGE 18kW Tankless Electric Water Heater

The HONGGE 18kW Tankless Electric Water Heater heats water as it flows, so there is no storage tank to wait on or make room for. It mounts on the wall to save space and connects with 1/2 inch NPT water fittings.

A cast aluminum heating element keeps the water separate from the electricity, which resists scale and corrosion. It heats water to between 86 and 140°F and turns on at a minimum flow of 0.39 GPM.

An LED display with an IMD touch screen sets the temperature. A built-in thermostat and over-temperature protection keep shower temperatures steady. Installation requires a 40A circuit breaker and 10AWG power cable, and professional installation is recommended.