Virtual environments are becoming more commonly used in urban planning and the construction industry. In this paper, we investigate whether exploring a 3D model of a factory site can identify design problems related to human perception, such as exposing users to heights without sufficient protection. Problems of height and space are not easily identified during the normal design process, and are costly to correct. We present a user study (n = 30) in which three different presentation formats, (1) CAVE, (2) Head Mounted Display (HMD), and (3) monitor display, are compared as methods to explore a virtual factory site. Our results indicate that HMD provides the most immersive experience and e.g. that the CAVE approach is problematic in cases where detailed navigation is required. We also identify that the use of heart rate monitoring when exploring the virtual environment can provide a useful indication of possible issues related to perceptions of the design.