ASME
  • Gas(Oil) Fired Water Tube Steam Boiler

Commercial Gas/Oil-fired Hot Water Boiler-H6

The Fangkuai H6 Series Commercial Hot Water Boiler delivers industrial-grade performance through integrated full pre-mixed flat combustion and Ultraten heat exchange technology. This configuration achieves 105.3% thermal efficiency (LHV basis) with ultra-low NOx emissions of ≤28mg/m³, compliant with EN 303-5 emission standards. The space-optimized design reduces installation footprints by 40% compared to conventional boilers while maintaining stable output across 20-100% load ranges.

Featuring intelligent modular coordination, the system supports parallel operation of up to 8 units with automatic load balancing, extending service life through optimized duty cycling. Designed for diverse applications including multi-residential buildings (apartments/villas), hospitality complexes, and commercial centers, it provides continuous 65-90°C hot water supply with simplified installation protocols requiring 35% fewer connection points than traditional systems.

  • Product price: $5880-$51800
  • Rated thermal power: 0.35MW-2.8MW
  • Rated thermal efficiency: 97.2%-106%
  • Operating pressure: 0.1Map
  • 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-fire hot water boiler-H6 Product Advantages

  • Ultraten heat exchange technology

    The unique feather-wing tube design greatly increases the heat exchange area, improves the heat exchange efficiency, significantly reduces the flue gas emission temperature, and the boiler efficiency is as high as over 105%.

  • Compact structure, space saving

    The boiler volume is 60% smaller than that of traditional condensing boilers, optimizing equipment layout, saving installation space and infrastructure costs.

  • Super strong scale holding capacity

    Water flows outside the wing tube, the heat exchange efficiency is stable for a long time, it is not easy to scale, and it is easy to clean and maintain.

  • Intelligent modular system

    Each boiler is a backup for each other, which greatly improves equipment utilization, investment utilization, and operational safety; improves system load regulation and maintains a constant outlet water temperature

Commercial Gas/Oil-fired Hot Water Boiler-H6 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℃ L * W * H(mm)
Hot water circulation(t/h) Gas consumption(Nm³/h) Design efficiency Hot water circulation(t/h) Gas consumption(Nm³/h) Design efficiency Hot water circulation(t/h) Gas consumption(Nm³/h) Design efficiency Hot water circulation(t/h) Gas consumption(Nm³/h) Design efficiency
H6-350 12 33.88 97.2 15.1 33.43 98.5% 15.1 31.67 104% 15.1 30.63 107.5% 2395* 815* 980
H6-700 24.08 67.76 97.2 30.1 66.87 98.5% 30.1 63.33 104% 30.1 61.27 107.5% 3085* 1055* 1130
H6-1050 36.12 102.8 96.1 45.15 101.6 97.2% 45.15 97.6 101.2% 45.15 93.6 105.5% 3055* 1230* 1490
H6-1400 48.2 137.1 96.1 60.2 135.5 97.2% 60.2 130.2 101.2% 60.2 124.9 105.5% 3280* 1230* 1490
H6-2100 72.24 205.4 96.2 90.3 203.08 97.3% 90.3 195.06 101.4% 90.3 187.29 105.5% 4080* 1300* 2140
H6-2800 96.4 273.86 96.2 120.4 270.77 97.3% 120.4 260.08 101.3% 120.4 249.96 105.4% 4370* 1550* 2140

H6 Series Commercial Hot Water Boiler: Advanced Low-Emission Heating Systems for Commercial Facilities​

Engineered to meet the rigorous demands of hotels, educational campuses, and retail centers, the H6 Series Commercial Hot Water Boiler delivers industry-leading thermal efficiency up to 98 percent alongside ultra-low nitrogen oxide emissions. This solution directly addresses rising energy costs and tightening environmental regulations across North America and Europe.

hot water boiler-H6

​Core Technology Breakdown​

​1. Full Premixed Flat Flame Combustion System​
The H6 boiler’s combustion chamber utilizes precision gas-air mixing technology to achieve complete fuel burn cycles. Third-party verified performance data confirms:

  • Nitrogen oxide emissions below 30 milligrams per cubic meter
  • Carbon monoxide levels under 10 parts per million
  • Continuous combustion efficiency between 95 to 98 percent

This technology enables compliance with California South Coast AQMD Rule 1146 and similar standards.

​2. Ultraten Heat Exchange Technology​
Featuring patent-pending winged tubes with turbulence-enhancing grooves, the H6’s heat exchanger provides:

  • Heat transfer coefficients five times higher than smooth-tube designs
  • Water-side pressure drop limited to 0.14 bar at maximum flow rates
  • Tolerance for total dissolved solids up to 500 milligrams per liter

​3. Modular Fleet Optimization​
Up to 16 boilers can be networked through integrated controllers that:

  • Automatically distribute thermal loads based on real-time demand
  • Enable seasonal efficiency improvements up to 12 percent
  • Provide remote performance monitoring via web-enabled dashboards
hot water boiler-H6 cases3

​Commercial Application Case Studies​

​Case 1: University Campus Retrofit

  • Replaced six 1970s-era steam boilers with eight H6-500kW modules
  • Annual natural gas consumption reduced by 1.2 million cubic meters
  • Achieved 34 percent reduction in heating costs across 18 academic buildings

​Case 2: Luxury Hotel Chain Upgrade

  • Installed twelve H6-350kW units with cascade control systems
  • Maintains 24/7 hot water supply for 450 guest rooms and spa facilities
  • Cut annual maintenance hours by 60 percent through predictive diagnostics
hot water boiler-H6 cases5

​Technical Specifications Overview​

Parameter H6-500kW Model Industry Average
NOx Emissions 28 mg/m³ 55 mg/m³
Startup Time 8 minutes 18 minutes
Footprint 1.8m² 4.2m²
Water Temp Range 40-85°C 50-80°C

​Meta Description​
The H6 Series Commercial Hot Water Boiler provides 98% efficiency with under 30mg/m³ NOx emissions. Designed for hotels, schools, and retail centers – reduce energy costs by 35% while meeting strict environmental standards. Request technical specifications.

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