ThermoMate 3500W Tankless Electric Water Heater – 120V On-Demand Hot Water for Sinks

Effortless, On-Demand Hot Water for Compact Spaces

Meet the ThermoMate 3500W Tankless Electric Water Heater, a compact solution designed to deliver hot water on demand for under-sink and small bath areas. With a 120V supply and a clear temperature display, you can fine-tune comfort at the tap without delay.

What it delivers at a glance

• Instant hot water at the point of use with a powerful 3500W heating system.
• Self-modulating power that adjusts as inlet temperature and flow change, helping prevent overheating.
• Temperature settings range from 86°F to 131°F, supporting precise comfort over a broad mix of tasks.

• Flow capacity of roughly 0.4–0.66 GPM, suitable for under-sink faucets and compact fixtures.
• Long-lasting build with a cast aluminum heating element separated from the water line, reducing mineral buildup.
• SUS 304 stainless steel water tube for added durability in wet environments.

Compact design, real-world use cases

The unit measures 7.9" x 6.4" x 2.5", making it a fit for tight spots like under cabinets, beneath sinks, hair salons, bar counters, and hotel reception areas. A sleek touch control panel with a digital temperature display provides quick, incremental adjustments for everyday tasks—from quick rinses to dishwashing.

With standard 1/2" NPT pipe fittings and a pre-wired pigtail for easier installation, this model is ETL certified for safety and reliability. Note that it is designed for hardwired operation and should be paired with a suitable circuit to ensure optimal performance.

What to check before you install

Important considerations ensure the unit fits your needs. Verify that the 3.5kW 120V configuration matches your electrical setup, including a 32A double-pole circuit breaker, 10 AWG minimum wire, and 1/2" NPT water connections. This helps you plan space, power, and plumbing during installation.