POU tank-type units are similar to large and tall models, but mostly have one heating element with the thermostat. Good examples of the electric mini-tank type are the Ariston from Bosch, SCH from Stiebel Eltron, Rheem 30-gal, while for the electric tankless POI models; Tempra from Stiebel Eltron and Ecosmart are popular. Popular manufacturers Eemax Stiebel Eltron Ecosmart Bosch Rheem Features The best point-of-use water heaters are equipped with some great components which can help to extend the heaters life, increase the performance and efficiency, save on energy, and even automatically control the system. Most of the point-of-use heaters are equipped with the metal tank, but there are also models with the plastic tank, like Marathon point-of-use water heater, that doesn't corrode. Heaters are usually equipped with only one screw-in style heating element with the power range from 1. 5 to 2 kW, which transfers the heat directly and efficiently to the surrounding water. Storage tank-type units are protected from the corrosive effects of hot water using the ceramic/glass coating, combined with the anode rod.
An instant, point-of-use water heater dramatically speeds up the delivery of hot water to the sink because it heats the water right at the sink. Hot water traveling from a conventional water heater to a sink will cool in the pipes on its way to the faucet. As a result, it wastes the energy used in heating it. Similarly, when you shut off the hot-water faucet, hot water stays in the pipes, losing its heat over time. A mini point-of-use water heater eliminates that wasted water and energy. In addition, because you don't have to let the water run while you wait for it to heat up, it also saves you time and frustration. Point-of-Use Water Heater Buying Storage-style point-of-use water heaters are rated by their water capacity and recovery rate (the time needed to heat a tank full of water to 90 degrees). Flow rate determines how many gallons per minute (GPM) of water a tankless mini water heater. Typical flow rates run from. 5 GPM to 2. 25 GPM. Top selling flow-through under-counter electric water heater delivers 4 gallons per minute, must be hardwired to 240-volt circuit.