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Sterling’s Nexus brings gas-ﬁred unit heaters to unprecedented levels of efficiency. Its industry leading 99%* thermal efficiency combines the latest innovations, including a tri-metal stainless steel heat exchanger and a state-of-the-art proprietary combustion control system.
Efficiency matters...not only is the Nexus the most energy efficient unit heater available, it is the most environmentally friendly too. Reduced emissions, low fuel utilization and a reduced carbon footprint give Nexus our green stamp of approval!
*Up to 99% maximum efficiency at full turndown, 95+% certiﬁed efficiency at high ﬁre.
“The less fossil fuels we burn the better it is for our future; all of my designs concentrate on this philosophy. We lead in innovation using the environment as our number one concern. We don’t follow...we lead.”
–Ken Cohen, Designer
In today’s marketplace where time is money, Nexus is designed to be user and service friendly. Whether natural or LP gas, conversions are simple and quick through a single oriﬁce conversion with kits included as a standard feature. Multiple operating voltages, ﬂexible venting options and some of the longest throws in the segment make Nexus the only choice for any application. Units can operate in a single unit mode, multi-unit networks or linked to a building management system with seamless control communication.
Nexus brings a whole new look to the unit heater arena with a beautiful commercial-grade brushed stainless steel jacket with contrasting black trim. Its corrosion resistant exterior and double-wall construction provide both durability and increased efficiency through reduced heat loss…appealing and functional.
Nexus’ tri-metal heat exchanger is the most advanced on the market today. Engineered for maximum efficiency; our tri-metal hybrid design utilizes all of today’s technologies for optimum heat transfer.
A unique combination of metals and tube conﬁgurations scrub every last bit of heat energy from the combustion process. The use of stainless steel with high conductivity brass and even higher conductivity aluminum all working in conjunction with turbulators to improve the heat transfer from the hot ﬂue gases to the bi-metal ﬁns produces up to 95+% operating efficiency at full ﬁre.
Units auto-adjust the air/fuel mixture for altitude adjustments so there are no ﬁeld adjustments required.
Nexus also has SafeSense technology for blocked inlet/ﬂue conditions. Units will maintain clean combustion in a partial blockage situation without decreasing performance insuring safe combustion at all times. In a situation of unsafe combustion, units will shut themselves down until the necessary corrective actions are completed.
Premium performance in the safest possible way… All units use Sterling’s proprietary combustion control platform which guarantees clean combustion regardless of the operating conditions.
Combustion is constantly monitored through Nexus’ electronic air/fuel coupling control platform, consistently maintaining safe levels of emissions.
The only fully modulating, high efficiency unit heater produced, Nexus utilizes a burner control and conﬁguration that allows a 3:1 turndown for precision discharge temperature control, with this technology units run more efficiently for a longer period of time with reduced cycling. Competitors use in-shot burners and only offer 1:1 on/off conﬁguration that often times result in over/under heating the occupied space and increased wear and tear on the equipment with constant cycling.
The Nexus Control Board includes Modbus communication as a standard feature without requiring additional control modules. The control board provides feedback to the building automation system allowing for the remote monitoring of over 30 data points including unit fault codes. This allows user to know what is wrong with the unit without even entering the building.
Nexus’ indoor air reset technology essentially learns the heating needs of the building by constantly monitoring run-time percentages and modulates accordingly.
Indoor Air Reset allows Nexus to operate at full modulation (low ﬁre) for as long as reasonable to maintain the heating load. By running at low ﬁre units run longer at higher efficiency resulting in less cycling, lower fuel costs and increased occupancy comfort.
Units automatically vary discharge temperatures based on the outside air temperature providing seamless modulation for optimum efficiencies. By running at lower discharge temperatures subject to the outdoor temperatures, units run longer at higher efficiency resulting in less cycling, lower fuel costs, and increased occupancy comfort. As the outdoor temperature drops, discharge temperatures increase and vice versa. Outdoor Air Reset is optimal in regions with substantial daily temperature swings.