Tankless Water Heaters · Best Tankless Water Heaters for 5+ people
10 Best Tankless Water Heaters for 5+ 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.
3
Also Great
Stiebel Tempra 20 Plus Electric Tankless Water Heater 19.2kW
Best for: electric with 1–2 people
100% match
Check today’s price →Why this pick
The Stiebel Eltron Tempra takes a different approach: 1–2 people (more people means higher simultaneous hot water demand). Stiebel Eltron Tempra 20 Plus 19.2kW electric tankless water heater.
4
#4 Pick
Stiebel Tempra 29 Trend Electric Tankless Water Heater 28.8kW
Best for: electric with 5+ people
100% 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.
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 RTEX-24 24kW differentiates with premium (unit price only; installation costs vary widely). Rheem RTEX-24 24kW 240V whole-house electric tankless water heater.
7
#7 Pick
Stiebel Tempra 24 Plus Electric Tankless Water Heater 24kW
Best for: electric with 3–4 people
75% 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.
8
#8 Pick
Stiebel Tempra 29 Plus (Legacy) 28.8kW
Best for: electric with 5+ people
75% 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 Plus legacy 28.8kW electric tankless water heater.
Why this pick
The Eccotemp i12-LP Indoor differentiates with propane (electric is easier to install; gas offers higher flow rates). Eccotemp i12-LP indoor propane tankless water heater.
Why this pick
The Eemax EEM24013 Electric differentiates with 1–2 people (more people means higher simultaneous hot water demand). Eemax EEM24013 13kW 240V electric tankless water heater.
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Best Tankless Water Heaters for 1–2 people and WarmBest Tankless Water Heaters for Electric and 1–2 peopleBest Tankless Water Heaters for Electric and 3–4 peopleBest Tankless Water Heaters for Electric and 5+ peopleBest Tankless Water Heaters for Electric and WarmBest Tankless Water Heaters for 1–2 people
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