20 Discussion The discussion focused on the instrumentation and metrics required to quantify the benefits of the novel heating and cooling systems presented during the talk. For example, the group discussed the number of longwave radiation sensors necessary to capture the performance of radiant panels with enough resolution and their use in tandem with thermographic cameras. The discussion also focused on the importance of the view factor when designing these systems and the opportunities behind using reflective surfaces to fine-tune their performance. Other questions tackled existing challenges in the hydronic installation of radiant panels as a potential barrier for their at-scale implementation yet an opportunity to provide comfort in a customized way. Finally, the session ended with a reflection on metrics to help designers, engineers, and building occupants understand the importance of radiant temperature, air speed, and humidity in achieving thermal comfort. Natural Ventilation and Thermal Mass (Prof. Leon Glicksman) Passive low-cost conditioning can be accomplished using natural ventilation combined with thermal mass. Leon Glicksman described the requirements for such a system's successful design and operation. Effective cooling of a building interior requires a high airflow rate set up by wind or buoyancy Photo: Justin Knight Fig 2.4 Prof. Glicksman (front) in discussion with the group
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