Abstract: A thermally insulated composite flexible hose, particularly suited for heat exchanger connections in building structures, comprising an outer foam jacket of thermal insulation and an inner extended unitary elastomeric extrusion comprising primary tubes spaced apart by an intermediate section separable therefrom along tear lines. The intermediate section may comprise two additional tubes smaller in diameter than the primary tubes. Insulated electrical conductors may be disposed along the outside of the unitary extrusion and inside the jacket.

Abstract: A method and means for interconnecting (a) a pair of headers for circulating inflow and outflow fluids such as a heat exchange liquid with (b) first and second extended flexible tube mats formed of a plurality of tubes cojoined side-by-side with the end portions thereof separated from one another.

Abstract: A solar thermosyphon water heater assembly wherein an inlet manifold and an outlet manifold which also serves as a storage tank are connected by a solar heat absorber comprising flexible rubber tube strips each formed of multiple tubes connected by separable webs, whereby prior to installation the strips can be rolled up about the storage tank or inlet manifold.

Abstract: A hand tool for radial installation in openings through the wall of a larger rigid tube of flexible tubes having rigid inner liners in a portion of their length adjacent to the end to be so installed. The tool includes a generally cylindrical elongated handle with an axial tube receiving surface groove. The handle joins a flange having a diameter greater than the handle, and the flange is so shaped as to provide for conveying the flexible tube inward in a first bend and then axially outward in accordance with a second bend. The inner liner acts as a stiffener during insertion and as a lock whereby the flexible tube is compressed between the inner liner and the opening in the larger rigid tube.

Abstract: A heat exchanger adapted particularly for use in embedded radiant heating systems and including a plurality of webbed tube mats and associated manifolds, wherein the webs are separated from their adjacent tubes along tear lines at at least two longitudinally spaced portions of the mat.

Abstract: A solar collector simple to install in the field comprises a mat formed of side-by-side extruded EPDM rubber strips having parallel hollow tubes, with inwardly diverging recesses extending along the strips so that the strips can be removably adhered to an insulating base without cement protruding above the tubes. A one-piece extrusion seals an edge of upper light transmissive panel, covers a side of the collector and seals the collector atop a roof or like surface.