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White rectangular wall-mounted unit with digital display and dial control, 17 by 14 by 3.75 inches

Eemax

Eemax HA018240 240VAC Electric Tankless Water Heater

SKU CH-BTDJ-AMBZN

Delivers on-demand hot water at 0.3 to 7 gpm with an adjustable 80–140 °F thermostat and a flow switch that activates only when water runs

  • TypeOther
  • Adjustable temperature 80 to 140 degrees Fahrenheit
  • Flow switch activates only when water runs saving energy
  • Compact dimensions 17 by 14 by 3.75 inches fit tight spaces
  • Digital display with keypad for precise control
  • 240 volt single phase 18000 watt residential electric tankless heater

Residential Electric Tankless Water Heater

The Eemax HA018240 provides on-demand hot water for residential indoor use. It operates on 240V AC single-phase power and draws 75 A through an 8 AWG cord. The unit measures 17 in high, 14 in wide and 3.75 in deep with 3/4 in cold inlet connections.

Upgrade from storage tank systems

This heater activates only when flow reaches 0.3 gpm, eliminating standby losses of a storage tank. It delivers adjustable temperatures from 80 to 140 degrees F at up to 7 gpm. The jump is worth it when simultaneous draw stays within that flow limit.

Compact wall-mount installation

The shallow 3.75 in depth fits between studs and frees floor space a tank would occupy. A dial control and digital keypad set the target temperature directly on the unit. The installation requires a dedicated 240V circuit sized for 18,000 W and compatible 3/4 in plumbing.

Highlights

  • Adjustable temperature 80 to 140 degrees Fahrenheit
  • Flow switch activates only when water runs saving energy
  • Compact dimensions 17 by 14 by 3.75 inches fit tight spaces
  • Digital display with keypad for precise control
  • 240 volt single phase 18000 watt residential electric tankless heater

Specifications

BrandEEMAX
TypeOther

Questions about this item

What cold-inlet pipe size does the Eemax HA018240 require?

The unit uses a 3/4 in cold inlet, so existing plumbing must match that size or be adapted with suitable fittings.

How is the 240 V AC supply connected, and what wiring mistake do installers make?

Connect the 8 AWG conductors to a dedicated 75 A circuit; the common error is undersizing the breaker or using smaller gauge wire.

Which component will need periodic attention on the HA018240?

The flow switch that activates the heater at 0.3 gpm should be inspected and cleaned if mineral build-up reduces its sensitivity.

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