Now in its fourth generation, Lochinvar’s high-efficiency condensing residential Knight Fire Tube Boiler series has a 95 percent annual fuel utilization efficiency (AFUE) rating and enhanced control functionality for optimized heating performance. The boiler is offered in six floor-standing models (55,000 to 285,000 Btu/hr) and seven wall-mount options (55,000 to 399,000 Btu/hr), each with turndown ratios, which determine operational range, of up to 10:1.
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