Heat Exchanger Copper-Fin Primary w/ Stainless Steel Secondary
Size Range 500 - 4,000 MBH
AHRI Boiler Efficiency 95.3%
AHRI Water Heater Efficiency 98%
Turndown Full Modulation (up to 5:1 Fusion XLF / Up to 4:1 Fusion)
Application Primary/Secondary, Reverse Return

The gas-fired Futera Fusion now brings the field-proven performance of Futera III commercial boilers and water heaters to the ultimate levels of efficiency and reliability. Unlike most condensing products available today that produce the highest efficiencies at the lowest inputs, the Fusion steps it up a notch by attaining efficiencies as high as 99% at full input. The full modulation firing system continuously varies the energy input to precisely match heating load without overfiring or wasting fuel.

The Fusion’s heat exchanger was designed using the most efficient and dependable heat transfer materials available today. The low-mass, gasketless primary heat exchanger has solid cast iron headers and finned copper (or optional cupronickel) tubing for superior heat transfer, resistance to scaling and protection against thermal shock.

The benefits don’t stop there. The condensing secondary heat exchanger is constructed from solid stainless steel and is designed to operate at the boiler's full flow rate. The unit operates in full condensing mode at all times, while a state-of-the-art temperature mixing system protects the boiler's primary heat exchanger. In addition, this design also offers a larger heat transfer surface area – more so than any competitive product currently available. Simply put, there is no better way to protect your investment.

Fusion XLF

Features and Benefits

Fusion XLF background
  • 500 - 2,000 MBH (Fusion)
  • 2,500 - 4,000 MBH (Fusion XLF)
  • Full Modulation up to (5:1 Fusion XLF / 4:1 Fusion)
  • Copper 4-Pass Primary Heat Exchanger (125 psi)
  • Stainless Steel Secondary Heat Exchanger Primary/Secondary
  • HEATNET 3.0 Integrated Control Platform
  • Touchscreen Programming & Diagnostics
  • Low NOx & CO
  • Category II & IV
  • PVC & PP Venting
  • Warranty (Heat Exchanger): 10-Year Boiler
  • NG or LP
  • Outdoor Installation
  • Symmetrically Air/Fuel Coupled
  • Modulating Temperature Control Mixing Valve
  • Variable Speed Blower
  • Flame Safeguard
  • Flow Switch (Mounted & Wired)
  • Integral Primary Pump
  • Service Friendly Design
  • Commercial Combustion Controls
  • Linked Operating Control System for Multiple Unit Applications
  • Gasket-less Heat Exchanger Assembly

Have Questions?

Contact a Sales Representative
Futera Fusion XLF

Heat Exchanger

Advanced Technology

The Fusion’s heat exchanger was designed using the most efficient and dependable heat transfer materials available today. The low-mass, gasket-less primary heat exchanger has solid cast iron (boiler) or bronze (water heater) and finned copper or cupronickel tubing for superior heat transfer, resistance to scaling, and protection against thermal shock.

The condensing secondary heat exchanger is solid stainless steel and designed to operate at the boiler’s full flow rate. It operates in full condensing mode at all times, while a state of the art temperature mixing system protects the boiler’s primary heat exchanger. Each Fusion carries a full non-prorated 20 year warranty against damage from condensate or thermal shock. There’s simply no better way to protect an owner’s investment. This design also offers a larger heat transfer surface area than any competitive product currently available. This translates into the highest available efficiencies – at full operating input! We challenge you to look closely at competing products’ efficiency data. No other water heater or boiler on the market has full input efficiencies as high as the Fusion’s.

Fusion XLF

Gas Train

Boiler Pilot

The Turbo Pilot®

Reliability at its best the Futera Series independent Turbo Pilot system with UV detection is far more durable and reliable than any competitive ignition system available today. At 8,000 BTU’s the Turbo Pilot provides a sure-fire source for burner ignition while providing continuous performance feedback through the HEATNET control platform.

Fuel Line

Symmetric Air/Fuel Coupling

RBI’s state-of-the-art air/fuel coupling combustion control system is instantly responsive and completely adaptable. This unique boiler combustion control system is designed to keep the Fusion running safe, clean and efficient. The system reacts to changes in air and instantly compensates fuel supply by adjusting input to maintain a constant air/fuel mixture across the modulation range. The unique design of the air/fuel mixing system ensures a complete and consistent air/ fuel mixture to the burner which increase combustion efficiency and repeatability all while maintaining low emissions.

HEATNET 3.0

Digital Touch Screen Programming

Lead/Lag Cascade (16 Units)

Mixed-Size Unit Communication

Adaptive Modulation

Circular Pump/VFD/Valve Control

BMS Integration

Freeze Protection & Delta T Monitoring

Hybrid/base Load Capability

Priority Boiler Control

Domestic Hot Water Communication

Web-Based Remote Monitoring/Dashboard

Diagnostics and Troubleshooting

Set Points

Exclusive Remote Monitoring Capability with HEATNET Online

Ease of Service

Large capacity in a small footprint offers greater flexibility and ease of installation in a space-saving design that leaves more elbowroom in the mechanical room. The rugged structural steel base is designed to fit through a standard 30" doorway. A variety of venting options provides added installation flexibility. Quick release latches allow for easy access to all components to make short work of service and maintenance.

Ratings and Dimensions

  Input   Boiler Output Unit Depth Unit Width Unit Height
Size MBH kW MBH kW In. mm In. mm In. mm
CB/CW 500 500 147 476 139 59 1499 26-1/8 664 48-1/2 1232
CB/CW 750 750 220 713 209 59 1499 26-1/8 664 55 1397
CB/CW 1000 1000 293 952 279 59 1499 26-1/8 664 61-1/2 1562
CB/CW 1250 1250 366 1190 349 66-1/2 1689 31-1/8 791 55-1/2 1410
CB/CW 1500 1500 440 1430 419 66-1/2 1689 31-1/8 791 60 1524
CB/CW 1750 1750 513 1668 489 66-1/2 1689 31-1/8 791 64-1/2 1638
CB/CW 2000 1999 586 1906 558 66-1/2 1689 31-1/8 791 69 1753
CB/CW 2500 2500 733 2350 689 84 2134 29-1/8 740 55-1/2 1410
CB/CW 3000 3000 879 2820 826 84 2134 29-1/8 740 60 1524
CB/CW 3500 3500 1026 3290 964 84 2134 29-1/8 740 64-1/2 1638
CB/CW 4000 4000 1172 3760 1102 84 2134 29-1/8 740 69 1753
  Cat IV Positive Cat II Air Intake   Connections   Shipping Weight
Size UL Listed Stainless Steel** Negative**   Natural Gas LP Water Lbs Kg
CB/CW 500 7" 8" 7" 8" 1" 2" 875 397
CB/CW 750 7" 8" 7" 8" 1" 2" 900 408
CB/CW 1000 7" 8" 8" 10" 1" 2" 1000 454
CB/CW 1250 8" 8" 8" 10" 1" 2-1/2" 1257 570
CB/CW 1500 8" 8" 8" 10" 1-1/4" 2-1/2" 1350 612
CB/CW 1750 10" 10" 10" 12" 1-1/2" 2-1/2" 1440 653
CB/CW 2000 10" 10" 10" 12" 1-1/2" 2-1/2" 1500 680
CB/CW 2500 8" 8" 12" 8" 1-1/2" 3" 2330 1057
CB/CW 3000 8" 8" 12" 8" 1-1/2" 3" 2384 1081
CB/CW 3500 10" 10" 14" 10" 1-1/2" 3" 2615 1186
CB/CW 4000 10" 10" 14" 10" 1-1/2" 3" 2726 1236

**Diameters may vary based on system design

Literature