The Machâ„¢ Series condensing/modulating cast aluminum sectional hot water boiler is covered in a brochure. Features and benefits of the boiler are laid out in detail. A figure shows the efficiency of the unit at certain entering water temperatures and firing rates for a given water flow rate. Line drawings illustrate various components of the boiler and a chart gives the dimensions of numerous sections of the boiler, as well as the Btu input, Btu output, and operating weight for the two models.

Patterson-Kelley, P.O. Box 458, East Stroudsburg, PA 18301; 877-728-5351; 570-476-7247 (fax); www.pkboilers.com.