Smart-windows possess variable tinting based on temperature, and therefore incident sunlight. They can provide substantial energy savings by reducing cooling/heating costs. Smart privacy windows allow light in through a near-opaque window, sufficient insolation results in a transition to fully opaque. Smart-walls store thermal energy via phase-change materials, to be released during periods of lower temperature such as evenings.
Passively managed windows do not require costly electronics or active programming and maintenance. Smart walls are more dynamic than high insulation (R-value), as they can absorb and re-emit heat, not just block it.
Passive pigmentation is a strategy employed throughout nature, for instance in cephalopods and many lizard species. Passive thermoregulation is an even more pervasive strategy that is present in different phylogenetic kingdoms. Human comfort is a threshold, not a gradient. The on/off state of RavenBrick products is attuned to this fact.
Buildings that can take advantage of natural sunlight can save on lighting and improve the quality of spaces for occupants. However, light also brings heat, necessitating cooling systems to maintain comfortable temperatures. Smart-windows can mitigate these two competing issues. Smart-walls can harness and store solar thermal energy as a resource. Estimates are that the smart-window system could save 30-40% of building energy consumption.Edit Summary