Evaluation of thermal comfort impact of direct fresh air supply in Winter. Part 2: comparison of different ways of air supply to exhaust only ventilation.

IEA Annex 27 "Evaluation and Demonstration of Domestic Ventilation Systems" has been engaged in developing the evaluation tools for various aspects of their performance. This paper describes the evaluation tool for thermal comfort impact by ventilation systems. The tool is based on the experiment by using inside artificial climate chamber, focusing upon the temperature difference and cold air supply rate into the room. As the evaluation index, the percentage of living space volume where a specified thermal comfort condition is satisfied is used. Grouping of supply air inlets is made and the score for each group can be obtained by referring tables. This tool is unique and helps practitioners very much knowing how serious or mild thermal comfort impact the ventilation system he/she is examining has.