| 摘要 |
A wood pellet burning boiler assembly (1) comprising a wood pellet hopper (2) feed auger (3) and enclosed water boiler (4). The water boiler (4) has hollow water heat exchanger walls (13,14) and a heat exchanger means (20) formed by a water carrying tank (21) housing a plurality of conduits (22) housing vortex inducing baffles (23) formed by spirally wound metal strips. <Figure 1>
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