Futera Fusion XLF
When it comes to high efficiency and even higher BTU capacities, RBI’s Futera Fusion XLF is in a class of its own. By combining the best features of the Futera Fusion and Futera XLF systems, the engineers at RBI have created a new commercial boiler system that increases output levels while maintaining ultra-high efficiencies – the likes of which have never been seen within the commercial boiler market.
As a fully condensing, gas-fired boiler, the Fusion XLF features an innovative design that brings superior power and energy efficiency with premium boiler performance and serviceability, all together in an unprecedented, industry-leading, small package design.
Ideal for commercial boiler applications with low operating, return or make-up water temperatures, the Fusion XLF is capable of reaching efficiencies as high as 99% at full input. With full modulation up to 5:1, the firing system continuously varies the energy input to match the heating load without overfiring and wasting fuel – providing extremely high part-load efficiencies.
The Fusion XLF also features HeatNet 3.0, an intuitive boiler control system that monitors system characteristics and modulates boiler firing rates, maximizing turndown ratios and maintaining peak efficiency, regardless of the load.

2,500-4,000 MBH
5:1 Modulation

- 2500 – 4000 MBH
- AHRI Certified Efficiency 95.8%
- Stainless Steel / Copper Hybrid Heat Exchanger
- Full Modulation with Continuous, 5:1 Turndown
- Sealed Combustion/Direct Vent
- Symmetrically Air/Fuel Coupled
- Commercial Combustion Controls
- HeatNet 3.0 Integrated Boiler Control Platform
- Gasketless Heat Exchanger Assembly
Input | Boiler | Output | Unit | Depth | Unit | Width | Unit | Height | ||
---|---|---|---|---|---|---|---|---|---|---|
Size | MBH | kW | MBH | kW | In. | mm | In. | mm | In. | mm |
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 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
3000
Submittal
- FlexCore Firetube 3000 Plan View Drawing.dwg
- FlexCore Firetube 3000 Plan View Drawing.pdf
- Futera Fusion XLF 3000 Plan View Drawing_2.dwg
- Futera Fusion XLF 3000 Plan View Drawing_2.pdf
- Futera XLF 3000 Plan View Drawing_1.dwg
- Futera XLF 3000 Plan View Drawing_1.pdf
- Torus 3000 Dual Fuel Plan View Drawing (RSUB-314.A).dwg
- Torus 3000 Plan View Drawing (RSUB-304.A).dwg
- Torus 3000 Plan View Drawing (RSUB-304.A).pdf
- Torus 3000 Vertical Plan View Drawing (RSUB-309.A).dwg
- Torus 3000 Vertical Plan View Drawing (RSUB-309.A).pdf
4000
Submittal
- FlexCore Firetube 4000 Plan View Drawing_1.dwg
- FlexCore Firetube 4000 Plan View Drawing_1.pdf
- Futera Fusion XLF 4000 Plan View Drawing_2.dwg
- Futera Fusion XLF 4000 Plan View Drawing_2.pdf
- Futera XLF 4000 Plan View Drawing_1.dwg
- Futera XLF 4000 Plan View Drawing_1.pdf
- Torus 3000 Dual Fuel Plan View Drawing (RSUB-314.A).pdf
- Torus 4000 Dual Fuel Plan View Drawing (RSUB-315.A).dwg
- Torus 4000 Dual Fuel Plan View Drawing (RSUB-315.A).pdf
- Torus 4000 Plan View Drawing (RSUB-305.A).dwg
- Torus 4000 Plan View Drawing (RSUB-305.A).pdf
- Torus 4000 Vertical Plan View Drawing (RSUB-310.A).dwg
- Torus 4000 Vertical Plan View Drawing (RSUB-310.A).pdf