Select the USC boiler for new construction, replacement or conversion. With an 87% AFUE efficiency rating, the USC offers one of the highest cast iron to Btu heating capacity ratios in the industry. The sealed combustion system mixes outside air and fuel for optimized clean burning. This advanced combustion design not only protects against harmful CO due to poor combustion but also conserves heated air within the living space by utilizing outside air for burning. The USC offers maximum installation flexibility. Vent the USC either directly through a side wall or vertically, utilizing stainless steel vent pipe. A lifetime warranty covering the entire heat exchanger is standard.
