Abstract: A length-adjustable truss includes an upper truss chord comprising a plurality of upper finger grooves; a lower truss chord comprising a plurality of lower finger grooves; and a first end panel defining an upper end, a lower end, an inner end, and an outer end; wherein: the first end panel comprises a plurality of upper fingers formed at the upper end and a plurality of lower fingers formed at the lower end; each of the upper fingers engage a corresponding one of the upper finger grooves and each of the lower fingers engage a corresponding one of the lower finger grooves; and the first end panel is trimmable at the outer end thereof.

Abstract: According to the invention, in the housing of a condenser, a carrier gas laden with a substance to be condensed out is fed to a first and a second heat exchanger surface in succession, where, in indirect contact with a heat transfer medium, it is brought to a temperature below the respective dew point temperature of the substance to be condensed out. An evaporation area, in which suitable heating means ensure that the carrier gas is heated up to a temperature above the dew point temperature, is provided between the first and the second heat exchanger surface in the flow path of the carrier gas. As a result, aerosols of the substance to be condensed out that have formed on the first heat exchanger surface evaporate and are at least partially condensed out on the second heat exchanger surface.