How the Electric Tankless Water Heater Finder works

Which details affect a match?

A model matches when its details meet every choice you select. Missing or conflicting values stay unknown. If nothing fits, the finder shows the closest option and what it misses.

• What minimum heating input has your installer specified (kW)?
• What is your available water pressure (PSI)?
• What is your maximum available unit width (inches)?

Order and links

The starting order helps you browse. Your choices determine which models match. When the first match has no product link, the finder identifies another linked match separately. Commission amounts do not determine a match.

Sources and limitations

Ten 240 V heaters, five EcoSmart, four Eemax HomeAdvantage II and Stiebel Eltron's Tempra 20 Plus model, from the makers' model pages checked September 26, 2026. The Tempra page gives power and voltage only, and its 19.2 kW is a maximum power output figure; nothing was borrowed from related models. Amperage, breaker sizes and flow at a temperature rise aren't compared. These heaters were compared on paper; none was installed or fired up.

The finder shows source links and the dates they were checked. Those dates do not establish today’s price or stock. Before ordering, confirm the model and variant on the seller’s page.