Who makes the best tankless water heater?

Best Reviews recommends the Stiebel Eltron Tempra 24 Plus electric tankless water heater, as of January 2015. The review website contends that Stiebel bests its competition in terms of heat output and hot water flow, ease of installation, features and price.

As an electric unit, the Stiebel is independent of natural gas heat. Although it is more expensive than the other models, it is effective enough to handle the hot water demands of an entire household. In the same report, the Ecosmart ECO 27 Electric tankless heater is noted as the best budget-conscious model. Although it cannot outperform the Stiebel model in terms of hot water output, it is the best compromise of performance and cost.