MFC II

AERCO’s MFC II is a dual fuel condensing boiler engineered for uncompromised uptime, ultra high efficiency, and resilient performance in facilities where failure is not an option. Available from 4,000 to 12,000 MBH and supporting natural gas, propane, and #2 fuel oil backup, the MFC II boiler maintains heat delivery during fuel supply disruptions, making it ideal for hospitals, data centers, military bases, laboratories, industrial plants, and central energy facilities among other applications.

MFC II enhances system stability with a large waterside volume that reduces cycling, absorbs load swings, and ensures safe operation – even in no flow conditions. It integrates seamlessly into plant systems through native Modbus, optional lead/lag control, and advanced BAS compatibility. A rugged 3 pass fire tube heat exchanger with full penetration welds and stainless steel condensing surfaces delivers long service life, while a spacious furnace and davited rear lid simplify maintenance without burner removal.

Features & Benefits

• Dual Fuel Flexibility: Operates on natural gas, propane, or #2 fuel oil backup for uninterrupted heating continuity
• High Thermal Efficiency: Achieves condensing efficiencies up to 94.5% for optimal operating performance
• Wide Capacity Range: Available from 4,000 to 12,000 MBH, supporting mid to large energy systems
• Stable, Low Cycling Operation: Large waterside volume minimizes cycling and mitigates thermal stress under varying load conditions
• Advanced Controls & BAS Integration: Native Modbus, lead/lag sequencing, remote setpoint, and advanced modulation strategies
• Ultra Low Emissions: Standard 30 ppm NOx, with 7 ppm options available for select capacities
• Rugged Heat Exchanger Design: 3 pass fire tube construction with carbon steel and 316L stainless steel condensing surfaces
• Simplified Service Access: Davited rear lid and spacious furnace design allow full access without burner removal
• Ducted Combustion Air Capable: Supports flexible venting and room air isolation requirements. 

Frequently Asked Questions

Engineered for Mission Critical Reliability

The dual fuel design enables seamless transitions during natural gas outages or emergencies, allowing facilities to maintain continuity with #2 fuel oil backup. Combined with high turndown ratios – up to 7:1 on natural gas and 5:1 on oil – the system maintains precise combustion control and responsiveness across variable demand profiles. This ensures stable performance and optimal temperature control within critical infrastructure environments where uptime is mandatory

Optimized for Modern Plant Integration

With native Modbus communication and optional lead/lag controls, the MFC II integrates easily into new or legacy central plants. It supports a full suite of BAS control modes, including constant setpoint, indoor/outdoor reset, remote setpoint, and proportional modulation. This flexibility makes the MFC II an ideal choice for multi boiler plants pursuing N+1 redundancy or advanced energy management strategies

Designed for Long Term Serviceability

Maintenance efficiency is built into every aspect of the MFC II boiler. Operators gain direct access to the combustion head and heat exchanger via a davited rear lid – without disconnecting the burner or fuel train – reducing service times and minimizing downtime. Full penetration welds and stainless steel condensing surfaces help resist corrosion, extend equipment life, and reduce the total cost of ownership.