Heat Exchanger Firetube Stainless Steel Condensing
Size Range 350 - 850 MBH
AHRI Boiler Efficiency 98.2%*
Turndown Full Modulation (up to 10:1*)
Applications Variable Volume, Full Flow, Primary / Secondary

Encore firetube boilers are the perfect solution for today's smaller commercial applications. Ultra high efficiency (+98%), a compact footprint and flexible venting options make Encore one of the most versatile firetube boilers on the market.

Incorporating all industry-proven components including HEATNET 3.0 touchscreen cascade control, Tru-Flow fuel/air coupling system with 10:1* turndown and capacities from 350 - 850 MBH Encore has the right equipment for all of today's energy conscious installations.

Encore uses a pressure driven mixing system with no moving parts for the industry's most reliable 10:1* turndown, without lowering the CO2%, all while avoiding nuisance ignition lockouts.

*Efficiencies and turndown vary by size


Features and Benefits

  • 350 - 850 MBH
  • +98% AHRI Certified Efficiency*
  • Full Modulation (Up to 10:1*)
  • Stainless Steel Heat Exchanger
  • Variable Volume, Full Flow and Primary/Secondary
  • Sika Vortex Flow Sensor
  • HEATNET 3.0 Integrated Control Platform
  • Remote Monitoring Capable
  • Touchscreen Programming and Diagnostics
  • Modbus, LonWorks and BACnet BMS Integration
  • Category II and IV (up to 100’Direct and Sidewall)
  • Concentric Vent Kits (sidewall and vertical 400 - 600 MBH)
  • PVC/CPVC, Polypropylene and Stainless Steel Vent Approved
  • NG/LP/Dual Fuel
  • Easy Maintenance and Installation
  • Outdoor Installation
  • Low Nox
  • Energy Star Certified Encore

*Efficiencies and turndown vary by size

Have Questions?

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Heat Exchanger Performance

Encore firetube heat exchangers are designed for optimum performance and durability. Made from an industrial quality stainless steel Encore heat exchangers are reliable and robust with superior corrosion resistance

Encore's heat exchanger is manufactured using a unique geometry of firetube design for maximum heat transfer by creating a "turbulent" flow of flue gases allowing Encore to "scrub" every last bit of energy efficiency across its large surface area for peak performance. Its anti-scaling baffling system is essentially self-cleaning, further ensuring product durability and corrosion resistance over the long haul.

Full Modulation
10:1* modulation works in perfect concert with our proven Tru-Flow neg-reg air/fuel combustion control system, insuring not only maximum performance efficiencies, but also clean, safe and reliable combustion always.

*Efficiencies and turndown vary by size

Encore Heat Exchanger
98.2 % AHRI Certified Product Performance Thermal Efficiency (RB0400)

Gas Train

Torus Heat Exchanger

Tru-Flow Air/Fuel

Tru-Flow is instantly responsive and completely adaptable. The system reacts to changes in air and instantly compensates fuel supply by adjusting input to maintain a constant air/fuel mixture across the modulation range, while increasing combustion efficiency and maintaining low emissions.

Encore boilers are capable of reliable full-fire performance at just 4" of gas pressure.

Encore Sika Sensor

SIKA Vortex Flow ®

All Encore Series boilers include a SIKA vortex flow sensor mounted in a by-pass configuration and mapped to indicate the boiler flow in (gpm).

SIKA flow sensors utilize vortex technology which is then converted to an electrical signal sent directly to the HEATNET Boiler Management System for real time flow annunciation.

Flow sensors are fully adjustable throughout the boiler model operating range.


Digital Touch Screen Programming

Lead/Lag Cascade (16 Units)

Mixed-Size Unit Communication

Adaptive Modulation

Circular Pump/VFD/Valve Control

BMS Integration

Freeze Protection & Delta T Monitoring

Hybrid/base Load Capability

Priority Boiler Control

Domestic Hot Water Communication

Web-Based Remote Monitoring/Dashboard

Diagnostics and Troubleshooting

Set Points

Exclusive Remote Monitoring Capability with HEATNET Online

Ratings and Dimensions