Double glazed thermal walls have long been a popular strategy to increase the energy efficiency of a building’s envelope while also providing improved day lighting to further increase energy efficiency. Two layers of glazing system are constructed two to three feet apart creating a ventilated cavity between them. When cold temperatures occur, heat is captured between the two glazing systems so that the perceived exterior temperature adjacent to the occupied space is substantially increased creating greatly reduced thermal temperature differentials between exterior and occupied space. In warm temperatures, the cavity is ventilated by natural convection, decreasing the heat load on the building’s envelope. Daylight control is often provided through use of mechanized blinds that track the sun, outside temperature and/or atmospheric conditions. Blinds automatically adjust to maximize daylighting, decrease glare and optimize solar heat gain.