Vacuum vaporization apparatus for heating one or a number of separate liquids

A fluid heater apparatus working according to the vacuum vaporization principle and serving for heating one or a number of fluid mediums which are separated from one another, comprising an evacuated vessel at least partially filled with a vaporizable heating liquid medium, said evacuated vessel including at least two components constructionally separated from each other, a heat exchanger arranged at the evacuated vessel for each fluid medium to be heated, each heat exchanger being practically exclusively heated by the vapor or the vaporizable heating liquid medium, at least one heat exchanger defining one of said at least two constructionally separate components of said evacuated vessel, said at least one heat exchanger comprising a hot water heater, another component of said at least two components of said evacuated vessel defining a heating component, and means for removably connecting said at least two components of the evacuated vessel, said connecting means comprising a connection conduit having a cross-section substantially smaller than the cross-section of either of said two components, said connection conduit flow connecting separate components of said evacuated vessel, said connection conduit further being constructed and arranged to transmit the vapor of the vaporizable heating liquid medium in countercurrent flow with the condensate of the vaporizable heating liquid medium in such a manner that the return flow of the condensate from said at least one heat exchanger component to said heating component can occur without hindering the operation of the apparatus whereby said evacuated vessel is capable of being divided into said at least two constructionally separate components for ease of transportation to and assembly at an installation site.