Many non-residential buildings that were built or retrofitted in the last 20 years use a Building Automation System (BAS). BASs are installed to achieve efficient operated buildings and a reduction of their energy use and operating costs. At the same time BASs allow tight control of the indoor climate in line with requirements as defined in guidelines, standards and building decrees. But this tight control does not necessarily lead to higher occupant satisfaction or lower complaint rates. In Part 1 of this article, published in REHVA Journal in June 2017, we discussed importance of control, effects of control and mechanisms involved (Hellwig & Boerstra, 2017).