ASME
  • Gas(Oil) Fired Water Tube Steam Boiler

Commercial Gas/Oil-fired Hot Water Boiler C6

The Fangkuai C6 series hot water boiler combines vertical compactness with FGR combustion technology to deliver 106% thermal efficiency* based on lower heating value (LHV) calculations. Its precision-engineered burner optimizes fuel utilization, sustaining exhaust temperatures below 50°C across operating cycles while achieving EU EcoDesign-compliant emissions below 30mg NOx/m³.

Serving residential to commercial demands, the C6 reliably heats villas, apartment complexes, hotels (50-300 rooms), restaurant chains, corporate campuses, sports venues, and tourist facilities without compromising eco-performance.

  • Product price: $2230-$27500
  • Rated thermal power: 0.12-1.4MW
  • Rated thermal efficiency: 106%
  • Operating pressure: 0.4Mpa
  • Available fuel: Natural gas, coke oven gas, blast furnace gas, carbon black tail gas, biogas, diesel, heavy oil, light oil, crude oil, etc.

Commercial gas/oil hot water boiler C6 product advantages

  • Small size and small footprint

    The heat exchange area of ​​the feather tube is 13 times that of the ordinary tube. Under the premise of meeting the heat exchange area, the volume of the boiler is greatly reduced and can even be transported by elevator;

  • Simple and Convenient Installation

    The product is designed for easy and efficient installation. Its performance is fully tested at the factory, ensuring seamless operation upon delivery. With clearly labeled components, on-site setup only requires connecting water, electricity, and gas pipelines. For heating applications, it can be directly integrated into the heating water system without the need for additional heat exchange equipment, significantly reducing upfront costs.

  • Low Emissions & High Efficiency

    The product combines full premixed surface combustion with winged tube heat transfer technology, ensuring complete combustion. This results in both low emissions (30mg/m³) and an impressive thermal efficiency of 106%, offering an environmentally friendly and energy-efficient solution.

  • Hot Water Supply

    This product is ideal for various applications, including villas, apartments, small to medium-sized hotels, chain restaurants, office buildings, sports venues, entertainment centers, clubs, as well as enterprises, institutions, resorts, and tourist attractions.

Commercial Gas/Oil Hot Water Boiler C6 Product Specifications

Types In/out water temperature 70℃/95℃ In/out water temperature 60℃/80℃ In/out water temperature 40℃/60℃ In/out water temperature 30℃/50℃ Weight(t) Water capacity(m³)
Hot water circulation(t/h) Gas consumption(Nm³/h) Hot water circulation(t/h) Gas consumption(Nm³/h) Hot water circulation(t/h) Gas consumption(Nm³/h) Hot water circulation(t/h) Gas consumption(Nm³/h)
C6-120 4.13 11.37 5.16 11.02 5.16 10.57 5.16 10.17 0.3 0.17
C6-170 5.85 17.01 7.31 16.54 7.31 15.85 7.31 15.27 0.49 0.26
C6-230 7.91 22.67 9.89 22.05 9.89 21.14 9.89 20.35 0.26 0.26
C6-350 12.04 34.01 15.05 33.08 15.05 31.71 15.05 30.53 0.69 0.35
C6-470 16.17 45.35 20.21 44.11 20.21 42.28 20.21 40.71 0.77 0.35
C6-700 24.08 68.03 30.1 66.17 30.1 63.43 30.1 61.07 1.39 0.5
C6-1050 36.12 102.04 45.15 99.26 45.15 95.15 45.15 91.6 1.33 0.73
C6-1400 48.16 136.05 60.2 132.34 60.2 126.85 60.2 122.13 1.48 0.64

How Fangkuai C6 Hot Water Boiler Cuts Hotel Heating Costs by 18%

“Last winter, a boutique hotel chain in California faced a tough decision: how to meet strict new emission standards without sacrificing heating performance across their 12 properties. Their existing boilers were draining $4,200 monthly in gas bills and risked non-compliance fines.

That’s when engineers proposed the Fangkuai C6 Hot Water series. Within 8 weeks of installation, three key improvements emerged:

  1. ​17.6% reduction​​ in natural gas consumption
  2. Exhaust temperatures ​​stable at 47°C​​ (passing CARB inspections)
  3. ​Zero callbacks​​ for combustion adjustments

This real-world scenario explains why over 160 hospitality businesses switched to C6 hot water boilers in 2023. Let’s unpack how its FGR technology creates these operational advantages.”

Commercial gas/oil hot water boiler C6 cases2

​Engineered for Maximum Fuel Savings​

Unlike conventional boilers wasting heat through exhaust stacks, the vertical C6 model achieves ​​106% thermal efficiency​​ via its patented flue gas recirculation (FGR) system. This technology recaptures waste heat, reducing gas consumption by up to 18% compared to standard units – a decisive advantage for hotels operating 24/7 heating.

​Meeting Strict Emission Standards Effortlessly​

With NOx emissions as low as ​​30mg/m³​​, the C6 series complies with EU EcoDesign 2022 regulations and California’s stringent air quality mandates. Its sub-50°C exhaust temperature eliminates the need for costly secondary emission control systems, making it ideal for urban commercial installations.

​Scalable Heating for Diverse Applications​

Capacity Range Ideal For Annual Fuel Cost*
0.12-0.35MW Boutique hotels (50 rooms) 12,500
0.5-1.0MW Chain restaurants 26,000
1.4MW Sports complexes $34,500+

*Based on 4,200 annual operating hours at $0.85/therm gas rate

Commercial gas/oil hot water boiler C6 cases3

​Why Global Clients Choose C6 Hot Water Boilers​

  • ​Proven ROI​​: 3-year average payback period through energy savings
  • ​Plug-and-Play Design​​: Pre-assembled modules reduce installation time by 60% vs. traditional boilers
  • ​20-Year Service Life​​: 3mm thick pressure vessel with ASME certification

​Limited Inventory Alert​

Order before December 15th to secure ​​free commissioning support​​ (value $2,500) and priority delivery. Contact our engineering team at [whatsApp: +182 6995 7295] for customized heat load calculations.

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