Benchmark NX
- Condensing, gas-fired, fire tube boiler
- Advanced Edge controller
- 399 to 500 MBH
Available in 399–500 MBH sizes, Benchmark NX pairs high‑efficiency condensing performance with the Edge® Controller for precise temperature control, integrated sequencing of up to 16 boilers, and native BACnet® IP/MSTP connectivity. Variable primary flow capability, flexible venting materials, and a compact footprint simplify design and installation, while a 10‑year heat‑exchanger warranty provides long‑term peace of mind.
Features & Benefits
- Up to 97.4% Efficiency: High thermal performance reduces energy costs year‑round
- 10:1 Turndown Ratio: Matches output to load for strong part‑load efficiency
- Advanced Edge® Controller: Precise control, flexible applications, 16‑boiler sequencing, and maintenance alerts
- Compact, Light‑Weight Design: Installs easily in tight spaces; ideal for smaller mechanical rooms
- Flexible Hydronic Integration: Supports primary‑variable piping and can operate as a backup boiler
- Low NOx Emissions: Capable of ≤20 ppm, supporting strict environmental requirements
- Stainless Steel Fire‑Tube Heat Exchanger: Durable design ensures long service life
- Broad Venting Options: AL29‑4C, polypropylene, PVC, and cPVC for simpler installation
- Natural Gas: Designed for efficient, reliable operation in commercial applications
- Industry‑Leading Warranty: Long‑term confidence backed by a 10‑year heat exchanger warranty
Designed for Real‑World Efficiency
Benchmark NX is purpose‑built for year‑round performance. The fully modulating burner tracks load precisely - down to 10% - to reduce cycling and fuel consumption, while the condensing heat exchanger unlocks high seasonal efficiencies. Low NOx emissions support compliance with stringent air‑quality requirements without sacrificing reliability.
Controls that Streamline Operations
With the Edge Controller, Benchmark NX simplifies commissioning and day‑to‑day operation. Technicians can set constant or reset setpoints, accept 0–10V/4–20mA signals, and enable variable‑speed pump control. For plants with multiple boilers, built‑in sequencing and reserve/backup contacts help maintain comfort and uptime, whether units are operating individually or cascaded.
Flexible by Design, Easy to Install and Maintain
Benchmark NX adapts to tight mechanical rooms and diverse piping/venting scenarios. It supports variable primary flow, accepts multiple vent materials (including AL29‑4C stainless, polypropylene, PVC, and CPVC), and offers ducted combustion air capability. Light weight and easy‑open service access further reduce installation and maintenance time.
Technical Documents
Technical Documents
Frequently Asked Questions
What is the AERCO Benchmark NX high-efficiency boiler?
The AERCO Benchmark NX is a condensing hot water boiler for closed-loop hydronic systems, available in 399 and 500 MBH input sizes. It combines a compact footprint with up to 97.4% efficiency, a stainless steel fire-tube heat exchanger, and a fully modulating burner.
What types of buildings and heating systems can use Benchmark NX?
Benchmark NX is designed for condensing applications in closed-loop hydronic systems and can operate as an individual boiler or as part of a modular boiler plant. Its compact design and 399 and 500 MBH capacity range support light commercial, multifamily, institutional, and other applications with right-sized heating loads.
How efficient is the Benchmark NX boiler?
Benchmark NX has a certified efficiency range of 87% to 97.4%. Its fully modulating burner provides up to a 10:1 turndown ratio, allowing boiler input to decrease to 10% of maximum capacity as the building load changes.
How does the Edge® Controller support boiler plant operation?
The Edge® Controller provides precise temperature control, variable-speed pump control, commissioning support, and on-board Boiler Sequencing Technology for up to 16 boilers. Control options include constant setpoint, indoor/outdoor reset, remote setpoint, 0–10V and 4–20mA signals, Modbus, and BACnet.
Can Benchmark NX connect to a building management system?
Yes. Benchmark NX includes integrated BACnet IP and BACnet MS/TP connectivity for communication with compatible building management systems. The Edge Controller also supports Modbus and can coordinate multiple boilers through the built-in sequencing controls.
What installation options does Benchmark NX provide for piping, fuel, and venting?
Benchmark NX supports variable primary flow installations, ducted combustion air, and operation with natural gas or propane. Acceptable vent materials include AL29-4C stainless steel, polypropylene, PVC, and CPVC, with 4-inch vent and air-intake connections.
What features support the durability and serviceability of Benchmark NX?
Benchmark NX uses a stainless steel fire-tube heat exchanger and provides easy-open access for service. It is also backed by a 10-year heat exchanger warranty and offers low NOx emissions capability of 20 ppm or less, depending on boiler capacity.