High pressure single-wall
The BJ range is another single-wall option in AISI 316L stainless steel, but designed to withstand higher pressures, up to 5,000 Pa with a gasket. It is intended for use with condensing boilers.
The BJ chimney is more robust than BI, designed to withstand the highpressure levels generated in certain forced draught systems. The built-in gasket ensures a tight seal at pressures of up to 5,000 Pa.