EcoSmart ECO 18 Electric Tankless Water Heater — 18 kW at 240V with Self-Modulating Technology | Compact 17 x 14 x 3.5 in

EcoSmart ECO 18: Efficient Tankless Water Heating On Demand

Meet the EcoSmart ECO 18, a compact electric tankless water heater designed for climates where incoming water is 62°F or warmer. Rated at 18 kW and powered by a 240V supply, this unit delivers hot water on demand without the bulk of a traditional tank. Its smart self-modulating technology tunes heat output to actual usage, which can help minimize unnecessary energy use while keeping you comfortable when you turn on the tap.

Performance you can feel in daily routines

• Heats over 2.5 gallons per minute (gpm), enabling practical hot water for a shower head and a sink with cooler inlet water.
• In warmer climates, two showers can run simultaneously when incoming water is above 70°F.
• Digital temperature control with 1-degree increments for precise comfort adjustments.
• Single-phase 240V electrical supply, designed for typical residential wiring.
• Compact footprint: 17 x 14 x 3.5 inches, making it easier to fit in smaller spaces.

Smart, space-saving heating for real-world use

• Self-modulating technology adapts heat output to demand, potentially reducing energy usage during light hot water draws.
• 1-degree step control helps dial in the exact temperature you prefer without overshooting.
• Space-conscious design suits apartments, tiny houses, utility closets, or other tight areas needing hot water on demand.

Before you buy: what to check

Before purchase and installation, verify that ECO 18 is the right size for your hot water needs and electrical requirements. This model operates on 240V single-phase power and is suited for climates with incoming water around 62°F or warmer. Its compact form supports flexible placement in many homes, but confirming fit and capacity ensures you get the best results for your household.