A large scale field erected air cooled industrial steam condenser connected to an industrial steam producing facility, comprising: a single or plurality of condenser streets, each condenser street comprising a row of condenser modules, each condenser module comprising a plenum section having a single fan or multiple fans drawing air through a plurality of heat exchanger panels supported in a heat exchanger section, and each heat exchanger panel having a longitudinal axis and a transverse axis perpendicular to its longitudinal axis; each heat exchanger panel comprising a plurality of tubes, a top bonnet connected to and in fluid communication with a top end of each tube, a bottom bonnet connected to and in fluid communication with a bottom end of at least a subset of said tubes, said bottom bonnet having a single steam inlet; each said condenser street comprising a steam distribution manifold suspended from said heat exchanger section and arranged along an axis that is perpendicular to a longitudinal axis of said heat exchanger panels at a midpoint of said heat exchanger panels and extending a length of said condenser street beneath a plurality of the heat exchanger panels, said steam distribution manifold comprising a cylinder having first and second ends, said cylinder closed at a second end distal from said first end, said cylinder having at its top surface a plurality of connections, each of said plurality of connections adapted to connect to a corresponding said single steam inlet; characterised in that each said heat exchanger panel is independently suspended from a frame of the heat exchanger section by a plurality of flexible hanging supports. a single or plurality of condenser streets, each condenser street comprising a row of condenser modules, each condenser module comprising a plenum section having a single fan or multiple fans drawing air through a plurality of heat exchanger panels supported in a heat exchanger section, and each heat exchanger panel having a longitudinal axis and a transverse axis perpendicular to its longitudinal axis; each heat exchanger panel comprising a plurality of tubes, a top bonnet connected to and in fluid communication with a top end of each tube, a bottom bonnet connected to and in fluid communication with a bottom end of at least a subset of said tubes, said bottom bonnet having a single steam inlet; each said condenser street comprising a steam distribution manifold suspended from said heat exchanger section and arranged along an axis that is perpendicular to a longitudinal axis of said heat exchanger panels at a midpoint of said heat exchanger panels and extending a length of said condenser street beneath a plurality of the heat exchanger panels, said steam distribution manifold comprising a cylinder having first and second ends, said cylinder closed at a second end distal from said first end, said cylinder having at its top surface a plurality of connections, each of said plurality of connections adapted to connect to a corresponding said single steam inlet; characterised in that each said heat exchanger panel is independently suspended from a frame of the heat exchanger section by a plurality of flexible hanging supports.