You might also like to check: AO Smith Vertex High-Efficiency series This group of heaters has only two models, both with an EF of 0.67. The water heaters are eco-friendly as they use the patented low NOx burner to reduce greenhouse gases. When the water is inactive, the automatic pilot re-light system shuts the unit off to reduce the gas consumption and save. The high efficient operation is the result of the unique water heater design that incorporates the electronic gas valve and automatic flue damper that can reduce heat loss.Įnergy Efficient models are using the intelligent electronic gas valve with the self-diagnostics and electronic ignition as the standard type. Whirlpool gas water heaters from the Energy Efficient series are more efficient than the standard type, where the highest energy factor, EF, was 0.63 (model 333587, 6-year warranty). This is what prolongs the tank life and keeps efficiency high. Models with 9- and 12-year warranties are equipped with the self-cleaning system, which uses a specially designed dip tube that creates the turbulent water flow to reduce the sediment build-up inside the water tank. It uses the heavy-duty aluminum anode rod to protect the tank from corrosion and a piezoelectric igniter to light the pilot. This system also includes an integrated igniter and thermopile, so there is no need for manual lighting. If the unit is not used for a longer period, the vacation setting sets the controller at its minimum temperature. The water temperature setting can be adjusted from 55 F to 155 F (180 F is max. If the water heater is not working, there will be a certain number of flashes that indicate different problems. The microprocessor controls the gas control valve, resulting in improved efficiency and performance and easy troubleshooting. The standard group uses the advanced 6th Sense technology that incorporates the self-powered and commercial-grade Honeywell gas control valve for precise temperature control and diagnostics. These units are powered by natural gas or propane and utilize the standard and low NOx burners. Whirlpool water heaters from the Standard series can be found in three sizes and warranties of 6, 9, and 12 years.
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