Best Tankless Water Heaters Under $600 Ranked

A strong value outdoor heater for a natural gas home in a mild climate, with a better warranty than most budget rivals.

A bargain outdoor whole home heater for mild climates, best for buyers comfortable with a short warranty.

An affordable smart heater for a small home that wants app control without paying for a premium brand.

For a single shower or a pair of sinks in a warm climate, with a lifetime warranty if a pro installs it.

A low cost whole home heater for a two bathroom house in a warm climate. The short warranty is the tradeoff for the price.

For a faucet far from the main water heater. A lifetime warranty at a low price makes it a safe point of use pick if you hire the install out.

For a small home or apartment in a warm climate with 125 A service. The Tempra 24 costs little more and gives more headroom.

For adding fast hot water to a far sink or a single shower in a warm climate. The long warranty sets it apart from cheaper point of use units.

A mainstream whole home heater for a two bathroom house in a warm climate. The Stiebel Tempra 24 Trend costs about the same with a longer warranty.

For buyers who want app control on a whole home electric heater. Without published warranty terms, the Stiebel Tempra 24 Trend is the safer buy at the same price.

A budget whole home heater for a small home in a warm climate. Buyers who want published flow and efficiency figures should pay more for a Stiebel or EcoSmart.

For a small home or apartment in a warm climate that wants whole house hot water on two breakers. Amazon stock was low when checked.

For a single shower or a pair of sinks in a warm climate. The EcoSmart ECO 11 costs less and carries a lifetime warranty.

For instant hot water at a single bathroom or kitchen sink on a budget.

For a busy kitchen sink or a pair of sinks that need more flow than a small point of use heater gives.

For instant hot water at a kitchen or bathroom sink far from the main heater.