MFC II
- Condensing, gas-fired, fire tube boiler
- Multi-fuel: natural gas, propane, or dual fuel (#2 fuel oil)
- 4000, 5000, 6000, 8000, 10,000, 12,000 MBH
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.
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.
Options and Accessories
X200 Boiler Noise Reducer
X500 Inhibited Antifreeze
X100 Inhibitor
X300 System Cleaner
X400 System Restorer
Technical Documents
Technical Documents
Frequently Asked Questions
What is the AERCO MFC II boiler?
MFC II is a dual-fuel condensing fire tube boiler designed for mission-critical facilities that require reliable, continuous heat. It supports natural gas and propane as primary fuels with #2 fuel oil backup capability and delivers thermal efficiencies up to 94.5%.
What capacity range does the MFC II boiler offer?
MFC II is available in six models with input capacities ranging from 4,000 MBH to 12,000 MBH. This range allows the boiler to serve mid-size to large commercial, institutional, and industrial heating applications.
What types of facilities use the MFC II boiler?
MFC II is designed for facilities where operational uptime is a priority. Typical applications include hospitals, healthcare campuses, military installations, data centers, laboratories, and central energy plants.
Does MFC II support building automation system integration?
Yes. MFC II integrates with building automation systems through native Modbus communication and supports features such as lead/lag operation, indoor and outdoor reset, remote setpoint adjustment, and 4–20 mA modulation control.
What are the emissions capabilities of the MFC II boiler?
Standard MFC II models are designed to achieve NOx emissions of 30 ppm. Ultra-low NOx configurations capable of 7 ppm emissions are also available on models up to 8,000 MBH.
How is the MFC II boiler designed for maintenance and service?
MFC II features a service-friendly design that allows direct access to key internal components. Its furnace design and davited rear lid simplify inspection and maintenance by reducing the need to remove the burner or fuel train during service procedures.