The three main types of control

摘要

There are, according to the Carbon Trust, essentially three types of control which can be brought together in various combinations: 1. Controlling by time - time controls vary in complexity from simple 24-hour on/off timers, to sophisticated seven-day timers, which allow for control to be set for individual days of the week, upgrading existing time controls to enable services to be switched on and off to better match daily and weekly requirements can result in substantial savings.