The English Boiler Hybrid Type Boiler is an enhanced HRT Type boiler designed and fabricated by English Boiler. The boiler consists of a conventional horizontal return tubular (HRT) boiler with enhanced circulation baffles and water cooled membrane waterwalls. Conventional HYBRID boilers manufacturer by other boiler manufacturers, require 5 to 6 sq. ft. of heating surface per BHP, while the English HYBRID Type requires only 3 to 4 sq. ft. per BHP for the same capacity as a conventional Hybrid boiler.