10 Best water heaters of 2025

Our top pick

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  Airthereal Electric Tankless Water Heater, 27kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 3 Showers, Evening Tide series

  The Airthereal Electric Tankless Water Heater EVT-27K offers an innovative solution for those seeking endless hot water without the bulk of traditional tanks. This unit provides on-demand hot water, ensuring you never face cold showers again. Its compact, wall-mounted design saves up to 90% of space compared to traditional water heaters, making it ideal for homes with limited space. The self-modulating technology only heats water when needed, significantly reducing energy usage and cutting down on utility bills by up to 50%. Customers have praised its consistent performance, even when supplying multiple showers or appliances simultaneously. While installation may require professional help due to specific electrical requirements, the long-term benefits of energy efficiency and space-saving make it a worthy investment for modern households. Whether for everyday use or as a backup solution, this water heater meets diverse needs effectively.