The Modu-Fire® FD noncondensing boiler is now available in two additional sizes: 2.5 million and 3 million Btuh. With Canadian Standards Association-certified efficiency of 88 percent, the N2500MFD and N3000MFD boilers have the highest efficiency of their class, claims the company. The full modulation design, with 5:1 turndown, matches boiler output to actual heat demand. Equipped with ENVI™ control, up to 24 boilers may be sequenced with boiler start rotation. The text-based display is easy to program and advanced communication capabilities, such as Modbus® RS-485 protocol, simplifies building management system integration.

Patterson-Kelley Co., Attn: Boiler Sales, P.O. Box 458, 100 Burson St., East Stroudsburg, PA 18301; 877-728-5351;;

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