Thermal storage can be compared to a battery which accumulates heat and gradually give it back.
Size estimate for 1 gal firebox = 5 to 10 gal of storage.
Application: UNI 55-150, Pellet 300, Eko 300 Volume: 530gal - 2000L Weight 500 lb, Width 57 ⅛", Height 81" Connection: 9x 1 ½" FPT and 5x ½" FPT Steel Grade: ASTM A283 Max Pressure: 60 PSI Insulation: Side 4" and Top 5" Made in Europe
A perfect designed heating system will match maximum heat output in the coldest day of the year. Meanwhile, boilers are almost always oversized and operate in partial load condition. In result, boilers rarely reach 100% capacity and are required to modulate down to a minimum of 30%. When boilers modulate down, they decrease proportionally from 90 to 70% efficiency.
Buffer tank allows the boiler to operate under any conditions at 100% capacity for maximum efficiency. They also serve as the center for all hydronic connections. Storage ease and optimize the operation of a modern hydronic system.