Through Armstrong's partnership with OTO Development, we commissioned The Brain® Model DRV80 1st generation in the Hampton Inn West located in Sacramento, California on March 1, 2009. Every 4 seconds The Brain® queries the cold, hot and mixed outlet thermistors and then makes an adjustment. Over the course of the past 9 years, there have been 70,984,548 queries and possible adjustments with ZERO issues. After more than 78,782 hours or 3,286 days, The Brain® consistently provides accurate water temperature control from the start.