some of the combi boilers run short cycles to keep the dhw heat exchanger hot all the time. This reduces the hot water wait time. The burner would light off however if it is. aug 13, 2024 · the navien tankless water heater has a dhw wait feature that ensures hot water is available instantly. With its efficient design, there is no need to wait for the water.
Gallery of Navien Dhw Wait Mode
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