DoesTheMath

Electric tankless water heaters on file

Electric instantaneous units, sized by flow rate rather than tank gallons.

274 registered models are electric tankless water heaters. Their filed UEF runs from 0.91 to 1.05 across 3 draw patterns. Each is listed below with its yearly energy, and compared only with others of the same draw pattern.

Other collections

Very small draw pattern

small units - a single bathroom, or a point-of-use heater under a sink — 271 models, lowest yearly energy first.

Medium draw pattern

a typical three- or four-person household, about 55 gallons on a busy morning — 2 models, lowest yearly energy first.

High draw pattern

a larger household, or one where showers and laundry overlap — 1 models, lowest yearly energy first.

DOE CCD · 2026-09-19

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