layered barrier to prevent thermal energy loss from the interior of the present invention to the external environs referring to fig3 on sunny days in late fall winter and early spring sun rays 22 penetrate the south facing solar walls 2 amp 2 a to the furthest northern extremes of the interior of the solar greenhouse as previously discussed this is due to the relatively low position of the sun relative to the southern horizon during these seasons specifically cleveland ohio site of the prototype suntrap solar greenhouse is situated at approximately 42 degrees north latitude which yields an observed sun inclination of 27 degrees above the south horizon at noon on the winter solstice december 21 upon entering the interior environs of the solar greenhouse the sun rays provide needed energy for the propagation of plants growing within and a portion of said sun rays are converted to long wave infrared heat energy by a process fully understood by the scientific community this heat energy is u201c trapped u201d within the suntrap solar greenhouse firstly by the heavily thermally insulated shell 1 and secondly by solar walls 2 amp 2 a by the process well known to the scientific community as the u201c greenhouse effect u201d whereby visible light energy which easily penetrates a glazing medium in the preferred embodiment clear tempered glass is transformed to longer wavelength infrared spectrum heat energy upon striking physical objects.