Best Commercial Electric Tankless Water Heaters for Restaurant Use
For busy kitchens, reliable on-demand hot water is essential. This guide highlights top commercial-grade electric tankless water heaters that are well-suited for restaurant environments, focusing on performance, installation needs, and efficiency. Each option supports multiple fixtures and varying incoming water temperatures to maintain steady hot water supply during peak hours. The selections below emphasize higher flow, robust build, and energy-conscious features that help control operating costs while meeting safety and code requirements for commercial use.
| Product | Brand | Approx. Max GPM | Key Strength |
|---|---|---|---|
| WINTEMP 36kW Tankless Electric Water Heater | WINTEMP | Up to 8.7 | High output for whole-house or multi-point usage |
| ECOTOUCH 27kW On-Demand Water Heater ECO270S | ECOTOUCH | Up to 5.5 | Self-modulating, smart controls, ETL listed |
| ECOTOUCH 27kW On-Demand Water Heater ECO270B | ECOTOUCH | Up to 5.5 | High power with user-friendly display and energy savings |
| Rheem RTEX-24 24kW Electric Tankless Water Heater | Rheem | Varies by conditions | Adjustable temperature, reliable performance guide |
| Rheem 18kW 240V Tankless Electric Water Heater | Rheem | Up to 4.4 | Digital thermostat with self-modulation |
WINTEMP 36kW Tankless Electric Water Heater
The WINTEMP 36kW unit provides substantial hot water flow, making it suitable for medium-to-large restaurant utilities or multiple kitchen prep areas. It draws significant current, so installation requires a robust electrical panel and appropriate breakers. Features include a precise LED temperature display and a self-regulating design to adapt to real-time flow and temperature, helping to minimize energy use while delivering consistent water temperature.
ECOTOUCH 27kW ECO270S On-Demand Water Heater
ECOTOUCH ECO270S delivers rapid hot water with up to 5.5 GPM capacity, suitable for 2–4 fixtures in a compact restaurant setup. The unit emphasizes safety and reliability with a self-modulating heater, multiple protections, and ETL certification. It requires a 200A service and careful space planning in the electrical panel to accommodate the high amperage draw typical of 27 kW units.
ECOTOUCH ECO270B 27kW On-Demand Water Heater
This variant also provides up to 5.5 GPM and emphasizes energy efficiency through smart input adjustment based on flow and temperature. It is designed for high-demand scenarios where multiple taps require hot water in parallel. Prospective buyers should verify electrical service availability and panel space due to the high current requirements associated with 27 kW models.
Rheem RTEX-24 24kW Electric Tankless Water Heater
Rheem’s RTEX-24 offers adjustable on/off control with a digital temperature display, allowing precise temperature setting from 80–140 degrees F. It is designed to deliver continuous hot water and features a robust heat exchange system. When planning for use in a restaurant, assess whether the unit’s power requirements fit within the venue’s electrical infrastructure and anticipated peak demand, as real-world performance will depend on incoming water temperature and flow patterns.
Rheem 18kW 240V Tankless Electric Water Heater
This model features an external digital thermostatic control with an LED display and self-modulation to meet hot water demand efficiently. Flow rates reach up to 4.4 GPM, making it a practical option for smaller restaurant tasks or as a supplementary heater in a larger system. Consider installation constraints and the balance between available electrical service and required hot water for your kitchen layout.
Buying Guide: Key Purchase Considerations
- Electrical service and panel space: Many high-capacity units require 200–300+ amp service and multiple double-pole breakers. Verify electrical capacity and available panel space before selecting a model.
- Required breakers and wiring: Plans often call for 2–4 x 40A double-pole breakers and appropriate gauge wiring. Incorrect sizing can hinder safety and performance.
- Flow rate needs: Restaurants vary in hot water demand. Compute peak concurrent usage (hands sinks, dishwashing, prep areas) to choose a unit with sufficient GPM, and consider models with self-modulation for efficiency at partial loads.
- Incoming water temperature: Colder water requires higher power to achieve target temperatures. In regions with low groundwater temperatures, oversizing or staged heating may be required.
- Vertical space and venting: Although electric tankless heaters do not require venting, they need safe, accessible installation space and proper clearances for maintenance.
- Energy efficiency: Self-modulating technology reduces energy usage when demand is lower. This can significantly lower operating costs in a high-demand kitchen.
- Maintenance and serviceability: Look for units with durable copper immersion elements and field-serviceable components to minimize downtime.
- Certification and safety: ETL or UL listings underline compliance with safety standards, important for commercial installations.
In choosing the best option for a restaurant, weigh peak demand against electrical infrastructure and space constraints. The WINTEMP 36kW model excels where a large, steady hot water supply is essential, while ECOTOUCH variants offer strong performance with smart controls for energy efficiency. Rheem options provide familiar design and reliable performance with adjustable temperature control. A qualified electrician or HVAC contractor should verify site readiness and ensure installation aligns with local codes.