Abstract: A disinfection device for a whirlpool tub that indicates the amount of remaining useful life of the device. The device includes two exposed electrical contacts arranged at a selected water level of the whirlpool tub. When the tub is filled and the water level in the tub is high enough to touch the exposed contacts, the water closes the electrical circuit formed by the contacts. The circuit monitors the number of times that the tub has been filled and checks it against a predetermined fill count. When the tub has been filed a selected number of times, the circuit indicates that the disinfection device needs to be replaced.

Abstract: A molded article includes an aerogel layer and a surface layer which is vacuum formed to the aerogel layer. The aerogel layer provides the structural support for the article heretofore performed by chopped fiberglass. Do to the porosity of the aerogel layer, the vacuum is drawn directly through the aerogel layer such that the aerogel layer forms the mold for the surface layer which attaches thereto.