Electric Tankless Water Heaters From 16 to 20 kW, Compared

Listed when: An electric tankless water heater whose listing states at least 16 kW and less than 24 kW.
Sorted by: Power (highest first)
In the list: The top 8 of 26 products in our catalog that meet the rule.

#1 · Power: 19.2 kW

19.2 kW (about 80 A at 240 V), about 2.9 GPM at a 45°F rise.

#2 · Power: 19.2 kW

19.2 kW (about 80 A at 240 V), about 2.0 GPM at a 45°F rise.

#3 · Power: 19

19 kW (about 79 A at 240 V), about 2.9 GPM at a 45°F rise.

#4 · Power: 18 kW

18 kW (about 75 A at 240 V), about 2.7 GPM at a 45°F rise.

#5 · Power: 18 kW

18 kW (about 75 A at 240 V), about 2.7 GPM at a 45°F rise; maker calls for 80Amp breaker.

#6 · Power: 18 kW

18 kW (about 75 A at 240 V), about 2.7 GPM at a 45°F rise; maker calls for 2 × 40 A double-pole breakers.

#7 · Power: 18 kW

18 kW (about 75 A at 240 V), about 2.7 GPM at a 45°F rise; maker calls for 2 x 40 Amp DP breakers.

#8 · Power: 18 kW

18 kW (about 75 A at 240 V), about 2.7 GPM at a 45°F rise; maker calls for two x 40A Double Pole Circuit Breaker.

How to choose between them

An 18 kW unit draws about 75 amps and holds about 2.7 GPM at a 45°F rise: one shower and a sink in a mild climate.

In a cold climate, with a 70°F rise, the same unit holds about 1.8 GPM.

Rankings follow the rule and order stated above, using makers' published specifications and listed prices. How we research · Disclosure