At the push of a button, Navien’s HotButton accessory activates the internal recirculation pump and gas-fired burner to heat up the water in the supply lines.
Navien’s NaviLink Wi-Fi control system allows for remote access for all the company’s tankless water heaters, combi-boilers and gas condensing boilers.
Navien’s condensing gas heating boiler is available in four sizes: NHB-55, NHB-80, NHB-110 and NHB-150, with turndown ratios respectively of 7:1, 10:1, 11:1 and 15:1.