Choosing the best commercial electric tankless water heater ensures reliable, energy-efficient hot water supply for your business or heavy residential use. Tankless models heat water instantly, eliminating storage tanks and reducing energy waste. This article reviews top-rated electric tankless water heaters from trusted brands like Rheem, AO Smith, EcoSmart, Orbek, and Ranein, highlighting their features and performance suited for commercial needs.
| Model | Brand | Flow Rate (GPM) | Power (kW) |
|---|---|---|---|
| Rheem 18kW 240V Tankless Electric Water Heater | Rheem | 4.4 | 18 |
| AO Smith ATI-540H-N Condensing Tankless Heater | AO Smith | 10 | — |
| Rheem RTEX-24 24kW Electric Tankless Water Heater | Rheem | 5.9 | 24 |
| EcoSmart ECO 11 13kW Electric Tankless Water Heater | EcoSmart | — | 13 |
| Orbek 18kW 240V Instant Hot Water Heater | Orbek | 4.17 | 18 |
Rheem 18kW 240V Tankless Electric Water Heater
This Rheem 18kW tankless electric water heater offers advanced technology with an external digital thermostatic control featuring an LED display that provides +/- 1 degree accuracy. It uses self-modulation to adjust power according to hot water demand, improving energy efficiency. The unit features durable copper immersion two heating elements which are field serviceable for easy maintenance. It delivers a consistent flow rate of up to 4.4 gallons per minute, suitable for light commercial applications or residential setups requiring multiple hot water outlets.
AO Smith ATI-540H-N Condensing Tankless Heater
The AO Smith ATI-540H-N is designed for both residential and light commercial use with a powerful flow rate of up to 10 GPM, ensuring you never run out of hot water. This model incorporates electric ignition to eliminate the need for a pilot light, boosting safety and convenience. It is Energy Star certified and offers an impressive Uniform Energy Factor of 0.95, indicating superior energy efficiency and reduced operating costs for businesses with consistent hot water needs.
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater
The Rheem RTEX-24 offers a higher 24kW power rating to support demanding commercial hot water needs. Equipped with an ON/OFF dial control and adjustable digital temperature display, this model features self-modulating power control that optimizes electricity use based on flow and temperature. It achieves a flow rate of up to 5.9 gallons per minute, balancing robust heating capacity with energy efficiency for medium to large commercial applications.
EcoSmart ECO 11 Electric Tankless Water Heater
The EcoSmart ECO 11 is a compact, wall-mounted unit that saves space with dimensions just 11.5 x 8 x 3.75 inches. Utilizing patented self-modulating technology, it precisely controls water temperature and flow rate to maintain consistent output within 1 degree of the selected temperature. This model achieves 99% thermal efficiency and only heats water on demand, making it a highly energy-efficient solution ideal for point-of-use installations in commercial settings where space and efficiency are vital.
Orbek 18kW 240V On Demand Instant Hot Water Heater
The Orbek 18kW electric tankless heater delivers up to 4.17 gallons per minute of hot water, ideal for whole-house use with 2-3 simultaneous points of use. Its water-electricity separation design reduces scaling and corrosion for longer life. The unit heats water in just 3 seconds with 98% efficiency, potentially cutting energy costs by up to 60%. Comprehensive safety features include leakage, over-temperature, high voltage, and dry-heating protections. ETL certification ensures dependable safety and performance.
Buying Guide For Commercial Electric Tankless Water Heaters
When selecting a commercial electric tankless water heater, consider these key factors:
- Flow Rate (GPM): Assess simultaneous hot water demand to choose a unit with adequate gallons per minute. Higher flow rates support multiple fixtures or appliances.
- Power Rating (kW): The power rating dictates heating capacity. Larger facilities generally need higher kW models to meet continuous hot water requirements.
- Energy Efficiency: Look for self-modulating technology, Energy Star certification, and high Uniform Energy Factor (UEF) to minimize electricity costs.
- Temperature Control: Digital thermostatic controls or dial displays allow precise temperature adjustments, preventing scalding and improving comfort.
- Installation Flexibility and Size: Compact, wall-mounted options save space and enable point-of-use installation near demand areas.
- Safety Features: Features like leakage detection, over-temperature cutoff, and certifications (ETL, UL) protect users and equipment.
- Maintenance and Durability: Choose models with durable heating elements (e.g., copper immersion), field serviceability, and scale/corrosion resistance for longevity.
By prioritizing these criteria, businesses can select the most efficient, reliable, and cost-effective electric tankless water heater that meets their commercial hot water demands.