The complete line of residential and commercial boilers manufactured by Smith Cast Iron Boilers is shown in this eight-page brochure, designed to help mechanical engineers, specifiers, contractors, building owners and homeowners select the right boiler for any commercial or residential installation. The brochure provides full-color photos of each boiler model, and includes ratings and specifications to provide necessary sizing and selection information. More than 125 boiler sizes are shown, including residential and commercial units for gas-fired, oil-fired and gas/oil fired applications. Smith Cast Iron Boilers.