The XFyre modulating, condensing boiler is available in sizes from 300 to 850 MBtu. The boiler achieves 94 percent thermal efficiency at full fire, up to 99 percent part load. A direct spark ignition system combined with zero governor fuel-air matching allows smooth soft start and modulation with 5:1 turndown capability. Features include digital operating controls including 0-10 vdc inputs from a building management system, an easily read LCD status display, full diagnostics, and fault memory. According to the manufacturer, the boiler meets low-NOx requirements for any jurisdiction. It is certified for PVC, CPVC, and SS venting; the indoor combustible clearance requirement is zero, except for the access area.

Raypak Inc., 2151 Eastman Ave., Oxnard, CA 93030; 805-278-5300; 805-278-5468 (fax);

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