NH150-DV and NH199-DV tankless hydronic boilers from Noritz.
The NH150-DV and NH199-DV tankless hydronic boilers from Noritz are available for constant room temperature comfort for various heating choices, such as panel radiators, baseboard flooring, and radiant floor heating. Significantly smaller in size than conventional hydronic boilers, the direct-vent units appear similar to tankless water heaters and weigh only 66 lbs versus a conventional boiler at 300 lbs. Featuring a gas-consumption range of 55,500 Btu/h to 150,000 Btu/h for the NH150-DV and up to 199,900 Btu/h for the NH199-DV, the units are ideal for residential or light commercial applications. They also offer nine temperature settings (140 to 180 F) for hydronic heating applications. Each unit has a high-flow capacity of 14 gpm with a three-speed Grundfos Pumps circulator, providing multiple pump curves, rather than the one-pump curve of a typical single-speed pump. The units also include an outdoor reset control.