McDonnell & Miller has published a new 12-page Commercial and Industrial Boiler Controls Application Guide (MM-837) to assist engineers in the selection of appropriate boiler controls for their specific applications. Featuring the complete line of commercial/industrial McDonnell & Miller boiler controls, the brochure's "compare-and-contrast" format facilitates a quick and accurate boiler control selection process. Both mechanical (float-type) and electronic (conductance probe-type) boiler controls are discussed, along with a comparison chart highlighting the differences between the two in order to help the installer make a more informed decision. McDonnell & Miller.