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Our Top Choice

Stiebel Eltron Tempra 24 Plus Electric

Pros: Features an Advanced Flow Control mechanism for precise temperature control. Powerful, electric-powered model that is a good option for most homes.

Cons: Offers a 3-year warranty, but only if the owner has the unit professionally installed. The extended warranty is worth the cost of installation for the quality of this model.

Summary: Exceptional flow, power and temperature control make this model by far the best tankless water heater available.
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Rinnai RL75iN Natural Gas Tankless Water Heater

Pros: A tankless water heater that stands out for its impressive temperature range and ability to be powered by natural gas or converted to propane.

Cons: Some reviewers found that this model has a few quality-control issues that need to be addressed.

Summary: Though a powerful model, its quality concerns make the Tempra a better choice.
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Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

Pros: A gas-powered model with convenient features. We give it high marks for its automatic shut off to prevent overheating, frost guard for cold weather, and large connections for increase flow.

Cons: Requires certified professional installation for warranty guarantee, which adds to this model's cost. Might not provide adequate hot water for larger homes.

Summary: Has a lot of features, but the Tempra offers better quality and power for the price.
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Ecosmart ECO 27 Electric Tankless Water Heater

Pros: A highly efficient model that comes at a low price point. Features one-degree increment temperature control for added efficiency.

Cons: Though the flow rate isn't as strong as costlier models we reviewed, the pay off is the price that satisfies budget-minded consumers.

Summary: Our recommended choice for owners who don't want to sacrifice efficiency for price. The best value available.
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Eccotemp FVI-12-NG High Capacity Gas Tankless Wate...

Pros: An affordable, gas-powered model that is built to work efficiently in smaller homes. Features an outside vent for precise fume removal.

Cons: Doesn't provide the best water pressure when compared to other models we tested.

Summary: A good choice for consumers who are on a budget and need a tankless water heater for small dwellings.