Tankless Water Heaters · Best Tankless Water Heaters for 3–4 people
10 Best Tankless Water Heaters for 3–4 people (2026)
We evaluated every model against our criteria. 10 earned a spot. Here's what each is best for — and when a different option wins.
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Top 3 at a glance
Top 3 at a glance
Why this pick
1–2 people typically need 1–2 GPM. The EcoSmart ECO 27 leads because it delivers electric with 3–4 people — exactly what this ranking prioritizes. EcoSmart ECO 27 27kW 240V electric tankless water heater with self-modulating technology.
Why this pick
The Eemax EEM24027 Electric offers electric with 3–4 people. Eemax EEM24027 27kW 240V electric tankless water heater.
Why this pick
The Rheem RTEX-24 24kW takes a different approach: premium (unit price only; installation costs vary widely). Rheem RTEX-24 24kW 240V whole-house electric tankless water heater.
4
#4 Pick
Stiebel Tempra 20 Plus Electric Tankless Water Heater 19.2kW
Best for: electric with 1–2 people
80% match
Check today’s price →Why this pick
The Stiebel Eltron Tempra differentiates with 1–2 people (more people means higher simultaneous hot water demand). Stiebel Eltron Tempra 20 Plus 19.2kW electric tankless water heater.
5
#5 Pick
Stiebel Tempra 24 Plus Electric Tankless Water Heater 24kW
Best for: electric with 3–4 people
80% match
Check today’s price →Why this pick
The Stiebel Eltron Tempra differentiates with premium (unit price only; installation costs vary widely). Stiebel Eltron Tempra 24 Plus 24kW electric tankless water heater.
Why this pick
The Noritz NRC661DV Natural differentiates with natural gas (electric is easier to install; gas offers higher flow rates). Noritz NRC661DV condensing natural gas indoor tankless water heater.
Why this pick
The Rheem RTEX-18 18kW differentiates with 1–2 people (more people means higher simultaneous hot water demand). Rheem RTEX-18 18kW 240V electric tankless water heater.
Why this pick
The Rheem RTGH-68DVLP Propane differentiates with propane (electric is easier to install; gas offers higher flow rates). Rheem RTGH-68DVLP condensing propane indoor tankless water heater.
Why this pick
The Rinnai V65iN Indoor differentiates with natural gas (electric is easier to install; gas offers higher flow rates). Rinnai V65iN non-condensing natural gas indoor tankless water heater.
10
#10 Pick
Stiebel Tempra 29 Trend Electric Tankless Water Heater 28.8kW
Best for: electric with 5+ people
60% match
Check today’s price →Why this pick
The Stiebel Eltron Tempra differentiates with 5+ people (more people means higher simultaneous hot water demand). Stiebel Eltron Tempra 29 Trend 28.8kW electric tankless water heater.
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