Eemax HomeAdvantage II HA018240 Tankless Electric Water Heater | 18kW 240V

Product Details

The Eemax HA018240 HomeAdvantage II is a powerful 18kW tankless electric water heater designed to handle the demands of a small-to-medium-sized home. Capable of providing an endless supply of hot water, this unit is commonly used to power a shower and a sink simultaneously in warmer climates, or as a high-capacity point-of-use solution in colder regions. By utilizing advanced self-modulating technology, the HA018240 only consumes the precise amount of energy needed to meet your temperature setting, eliminating the standby energy loss of traditional tanks and reclaiming valuable square footage in your utility room.

Key Features:

• Whole-Home Capacity: Provides enough hot water for up to two simultaneous showers in southern climates ($75^\circ\text{F}$ incoming water) or one shower in northern climates ($37^\circ\text{F}$ incoming water).
• Self-Modulating Technology: Internal sensors monitor water flow and temperature, adjusting power consumption in real-time to maintain consistent output while maximizing energy savings.
• Digital Temperature Display: A bright, easy-to-read LED display allows you to adjust your water temperature in 1-degree increments from 80°F to 140°F.
• Copper Immersion Elements: Features two 9kW copper heating elements with brass tops that are designed for durability, easy replacement, and superior heat transfer.
• Space-Saving Design: Compact enough to be installed in a closet or under a large vanity, freeing up the floor space occupied by a 40 or 50-gallon tank.

Specifications:

• Power Rating: 18.0 kW
• Voltage: 240V (Single Phase)
• Amperage Draw: 75 Amps
• Required Breakers: 2 x 40 Amp (Double Pole)
• Recommended Wire Size: 2 sets of 8 AWG
• Water Connections: 3/4" NPT
• Max Flow Rate: Up to 4.4 GPM (Depending on temperature rise)
• Dimensions: 17" H x 14" W x 3.75" D

Installation & Maintenance Tips:

• Electrical Requirements: This unit requires a robust electrical setup, including two dedicated 40-amp double-pole breakers. Ensure your home's main service panel can support the 75-amp load.
• Water Pressure: Requires a minimum of 0.3 GPM to activate the heating elements. For optimal performance, ensure your home’s dynamic water pressure is between 30 and 150 PSI.
• Annual Descaling: To maintain the 99% energy efficiency rating, it is recommended to flush the unit with a descaling solution once a year, especially if you live in a hard-water area.
• Plumbing Layout: Install the unit as close to the primary point of use (such as the master bathroom) as possible to minimize the "wait time" for hot water to travel through the pipes.

Common Uses/Applications:

• Apartments & Condos: An ideal primary water heater for 1-2 bedroom, 1-2 bathroom units.
• Lake Houses & Cabins: Provides a "set it and forget it" solution that doesn't waste energy when the property is unoccupied.
• Master Suite Addition: Perfect for providing dedicated hot water to a new luxury bathroom with a soaking tub or walk-in shower.
• Commercial Handwashing: Can support multiple sinks in a high-traffic restaurant or office environment.

Common Questions:

Q: Will this unit work if I only have 208V power?

A: Yes, but the power output will be de-rated to 13.5kW. This will result in a lower flow rate and a cooler maximum temperature compared to 240V operation.

Q: Can it handle a high-flow rain shower head?

A: In warmer climates, yes. In colder climates, a 2.5 GPM rain head may require the larger 24kW or 27kW models to maintain a $105^\circ\text{F}$ shower temperature.

Q: Is it safe for well water?

A: Yes, however, a sediment pre-filter is highly recommended to prevent sand or grit from clogging the internal flow sensor.

The Eemax HA018240 HomeAdvantage II balances high-output performance with a compact footprint, making it the premier choice for modern, energy-efficient whole-home water heating.