| CPC G02F 1/163 (2013.01) [E06B 9/24 (2013.01); G05B 15/02 (2013.01); E06B 2009/2417 (2013.01); E06B 2009/2464 (2013.01)] | 22 Claims |

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1. A method of controlling tint of a tintable window, the method comprising:
(a) determining clear sky irradiance through the tintable window at a future time;
(b) using the clear sky irradiance determined to modify a tint level of the tintable window; and
(c) transitioning, or generating a schedule to transition, tint of the tintable window to the tint level modified, wherein the tint level modified is based at least in part on a space type associated with the tintable window.
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