Three classes of spectrally selective paint will be presented aimed at reduce the demand for compressor driven cooling powers while maintaining comfortable interiors in a building and exterior aesthetics. The ability of spectrally selective paints, especially on roofs, to reduce the cooling load of buildings is widely underestimated. In shopping centres, supermarkets, transport terminals, warehouses and large manufacturing facilities it will be demonstrated that annual heating/cooling energy savings of 30% to 50% are possible. It will be shown how the impacts on power needed for cooling and de-humidification can occur in two ways. The obvious one is reduction in solar heat gain, and in addition for many installations, enhanced energy efficiency of cooling equipment. Examples of performance will be given for different real paint combinations of solar reflectance (Rsol) and thermal black body emittance (e). Coating classes considered have the following combination of properties (i) Colour white, Rsol ~ 90% , e > 0.90, (ii) Colour as desired, high to medium Rsol via high NIR reflectance, high e (iii) high e only at the atmospheric window for radiation transfer to space. For type (i) glare issues are shown not to be a major issue. For type (iii) some significant recent new and simple coating formulation developments will be noted. They absorb strongly precisely in range 7.9 μm to 13.0 μm, while reflecting all other incoming thermal radiation. These are mainly for use for high performance night sky cooling and applications will be outlined including hybrid compressor driven cooling systems.