The new VF Series Boiler from A. O. Smith provides up to 88% thermal efficiency by utilizing a vertical tube design.



The new VF Series Boiler is yet another testament to the innovative tradition of A. O. Smith. This boiler provides up to 88% thermal efficiency by utilizing a vertical tube design-allowing a large heat transfer area while maintaining the small footprint ideal for retrofit applications.  The unit’s modulating capabilities with 4 to 1 turndown ratio prevents energy-stealing short-cycling, smoother system operation and higher overall system efficiencies.