Nexus Heaters

The Sterling Nexus series gas unit heaters are the most efficient and advanced unit heaters available! They are the only +90% efficient unit heater that come standard with: Modulating controls which allow the heaters to vary their output anywhere from 35% to 100% of capacity. Modulation is automatically handled by the heater, so no special thermostat is needed. Up to 99% efficiency can be obtained at its lowest output!Stainless steel casing and heat exchanger provides maximum protection...

Concentric vents make it easier to have a two-pipe installation for high efficiency furnaces. These vents simplify installation and only require one hole through the wall or roof where the pipes terminate. Without using these vents, the installation would require cutting two holes through the home, one for each pipe. These vents save time and money by reducing the amount of work required. Available in 2", 3", or 4" intake vent sizes. Vent Size Fits Nexus Models 2" HU50, HU100, HU150 3" HU200...