Hot Water List

avalon water heaters

3 basic models and 3 listed models.

Certified figures by basic model

avalon basic models and their certified figures
Basic modelTypeUEFFlow at a 67°F rise (gal/min)Recovery efficiencyModel numbers
A13TWH Electric tankless 0.841.384% A13TWH
A18TWH Electric tankless 0.921.898% A18TWH
A36TWH Electric tankless 0.953.497% A36TWH

A range means the models under one basic model differ. A dash means the model has no such figure.

Per unit of energy, its heat into water, or UEF, reaches 0.95. A UEF of 0.95 means less energy went into the water than was used. The A36TWH is the one basic model of this brand with that UEF.

This brand's whole range is one type: electric tankless. Its tankless models reach their highest flow on the A36TWH. In the test, that flow warms by 67°F at 3.4 gallons per minute.

Of the 117 brands on this site, 65 list more model numbers than avalon. On this site, only this brand lists these basic model numbers.

Updated Oct 17, 2026 · Methodology