High-efficiency biomass boilers

Hydronics for high-efficiency biomass boilers

link to .ppt presentation:

 http://www.nyserda.ny.gov/All-Programs/Programs/Become-a-Contractor/Renewable-Heat-NY-Contractors

Fairly complicated.  For cordwood boilers, burn fast, burn hot, and store the heat in a stratified, insulated water tank.  For pellet boilers, don't overdesign the system, use lots of controls/sensors, and again store the heat in a stratified, insulated water tank.