Abstract: A sanitary single-control mixer fitting with regulating elements is formed having at least two discs, of which one serves as a static valve seat disc and includes two inlet ports for cold and hot water, as well as an outlet port. The second disc is shiftably mounted on the valve seat disc and includes a mixing chamber cavity, which is sufficiently dimensioned to partially or completely connect the inlet ports with the outlet port of the valve seat disc. The mixing chamber cavity in the shiftable disc is of asymmetrical form in relation to a symmetrical perforation pattern of the inlets and outlet parts in the static valve seat disc so that the usual mixed water temperature ranges, which constitute a so-called comfort zone, and therefore, the corresponding mid-position of the mixing chamber cavity is designed to reduce the free flow cross sectional area of the inlet port for the cold water but the mixing chamber cavity is greater than the cross sectional area of the hot water inlet.

Abstract: A prefabricated chimney assembly of the dual-wall type, adapted to be coupled to the flue outlet of a fireplace, is disclosed. The chimney assembly includes an inner conduit extending the length of the chimney assembly to form the flue through which combustion gases flow upwardly, and an outer conduit mounted in spaced relationship to the inner conduit so as to define an annular passage for conducting only outside air downwardly therethrough.