WAC 51-11R-20220. Section R202.20 — T

THERMAL DISTRIBUTION EFFICIENCY (TDE). The resistance to changes in air heat as air is conveyed through a distance of air duct. TDE is a heat loss calculation evaluating the difference in the heat of the air between the air duct inlet and outlet caused by differences in temperatures between the air in the duct and the duct material. TDE is expressed as a percent difference between the inlet and outlet heat in the duct. THERMAL ISOLATION. Physical and space conditioning separation from conditioned space(s) . The conditioned space(s) shall be controlled as separate zones for heating and cooling or conditioned by separate equipment. THERMOSTAT. An automatic control device used to maintain temperature at a fixed or adjustable set point.