Thermal comfort within buildings is strongly influenced by the mechanical systems as well as the enclosure design. In an effort to reduce energy consumption and increase occupant health and satisfaction, design teams and certifications such as ‘Passive House’ have increasingly focused on improving the envelope performance (energy, comfort) and quality (durability) in order to achieve these goals. Standards such as ASHRAE 55 and the ISO 7730 have long provided guidance to designers for thermal comfort metrics but new modeling tools can now allow designers an unprecedented view into how occupants will experience spaces long before they are built. This session will look at new methods for detailed thermal comfort modeling, in particular the effect of windows on occupant satisfaction and certification compliance.