Solar heater, building cladding unit

摘要

A heat-protective building cladding unit in which a frame carries two spaced apart transparent sheets. One or more movable members are arranged in the space between the transparent sheets for selective movement. The movable member may thus be moved selectively to permit or prevent solar radiation from passing between the two transparent sheets. The unit is mounted to enclose a selected area of a building wall onto which a selective absorbing layer has been applied. Heat is conducted from the selective layer to the building interior by heat pipes or a circulating fluid.