SPMV

The “Standard Predicted Mean Vote Modified” (SPMV*) metric is used as it can effectively account for the physics associated with elevated solar exposure and humidity ranges present outdoors. SPMV* is a modified version of the ASHRAE PMV metric which better accounts for the larger range of outdoor conditions. The SPMV* index is based on surveys and perceptions of individuals.  It is based on 80% of respondents agreeing on the condition they are feeling.  It is, in no way, a definitive measure of an individual’s thermal comfort.  Also, the variety of conditions and activities that impact the perception of comfort are large and varied. Any thermal comfort analysis should therefore be viewed as a guide and not as a quantitative assessment