Hydronic System Design for High-Efficiency Biomass Boilers

John Siegenthaler

Wednesday April 12th1:00 pm to 9:00 pm (dinner included)

John “Siggy” Siegenthaler will be returning to Alaska to offer his 8 hour class - How Hydronic Systems Supplied From Biomass Boilers Should Be Designed. Siggy has worked with New York State Energy Research and Development Authority (NYSERDA) to provide training for their Renewable Heat NY program. To date they have trained over 150 heating professionals. He has also been involved with plans review and “forensics” involving biomass boiler systems that have not performed as expected.

$200 - 6.5 CEUs available for engineers. Registration is available online.

Topics include: 

  • Operating characteristics of modern pellet-fired boilers
  • Operating characteristics of modern cordwood gasification boilers
  • Thermal storage options and sizing
  • Piping thermal to maintain temperature stratification
  • Boiler anti-condensation options
  • Proper venting practices
  • Outdoor reset control strategies
  • Application of high-efficiency circulators


  • Mixing options for supply water to distribution system
  • Preferred low-temperature heat emitter options
  • Creating a combi-system for heating and domestic hot water production
  • Retrofitting to existing higher-temperature distribution systems
  • Integration with existing boilers
  • Use of staged multiple boiler configurations
  • Control concepts
  • "Lessons learned" from recent biomass heating system installations

If minimum numbers are not met, this workshop will be cancelled with a full refund. Refunds will not be issued after March 10 for this event. Refunds can be requested prior to March 8. Refunds will be subject to a 3% processing fee.

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