A field study of thermal comfort with radiant heating

Abstract

Large surface radiant heating and cooling systems have emerged as a less energy intensive alternative to conventional air-based and high-temperature small surface thermal control systems, reducing greenhouse gas emissions associated with building operations. Some authors claim radiant systems also improve thermal comfort. Empirical demonstration of potential improvements is crucial to allow designers to evaluate and select new technologies based on field evidence. The SAIT Tower student residence appears to be the first large building in the world equipped with a radiant wall heating system. Occupant thermal comfort was evaluated with questionnaires and concurrent field measurements. While the comfort model predicted about 13 % dissatisfied for the 31 suites surveyed, about 26 % of the occupants voted outside the comfort range, while the ASHRAE comfort standartd limit is 20%.