Abstract: An electric heating apparatus heats a circulating fluid for a basin or pool. A section of a duct is connected, at its upstream end, to an intake duct for the fluid. Its downstream end is connected to a duct for the discharge of that fluid, this forming an end-to-end series for conducting the fluid. The apparatus includes a plurality of heating elements elongated in the direction of the elongation of the duct. The heating unit includes the heating element mounted on an elongated base and approximately parallel with the longitudinal dimension of said base. The heating unit is mounted on the duct in such a manner that the base closes an opening which is provided to facilitate the assembling of the heating unit on the duct. The heating elements are supported by a support that is movably mounted inside an opening in the base.

Abstract: A heat exchanger of the tube bundle type has a cylindrical body unit with an intake and outlet for the primary fluid. End sections of the body have closing flanges across which the tubes pass. Each flange is made of a material of rubber type and has a circular plate which bears on it periphery a set of circular lips. The flange rests with one of the sets of lips on a radial surface of the corresponding end section of the body unit. A mount element with a radial front surface rests on the other set of lips. A screw fastened to the outer wall of each end section locks the mouth element against the flange between the mount element and the body.

Abstract: It is used to reheat a secondary fluid such as pool water or sea water. It comprises a body provided with an inlet for the secondary fluid to be reheated and an outlet for the reheated fluid, a sleeve inside the body, a coil in which the primary fluid circulates and which is housed inside the annular space between the body and the sleeve and outside of which the water to be reheated passes. The body (1) and the sleeve (8) are made of a plastic-based material, either reinforced or not, and the coil (10) is made of titanium.