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Orange County 13 <br />Effective: (date) Attachment <br />From American Society of Heating, Refrigeration <br />and Air Conditioning Engineers (ASHRAE) Standards <br />Thermal comfort is that condition of mind that expresses satisfaction with the <br />thermal environment. There are large variations, both physiologically and <br />psychologically, from person to person, which makes it difficult to satisfy <br />everybody in a space. The environmental conditions required for comfort are not <br />the same for everyone. However, extensive laboratory and field data have been <br />collected that provide the necessary statistical data to define conditions that a <br />specified percentage of occupants will find thermally comfortable. <br />htto://industries. bnet.com/wh iteoaoer. asox?scname=P I u m bino+and+HVAC+Ea u <br />ment&docid=114190 <br />2. This standard specifies the combinations of indoor space environment and <br />personal factors that will produce thermal environmental conditions acceptable <br />to 80% or more of the occupants within a space. The environmental factors <br />addressed are temperature, thermal radiation, humidity, and air speed; the <br />personal factors are those of activity and clothing. <br />htto://www.constructionbook.com/xa/ASP/Product) D.3695/id.402/sub) D.636/ax/def <br />ault2.htm <br />3. ASHRAE Standard 55-1992 Thermal Environmental Conditions far Human Occupancy, <br />recommends the fallowing acceptable temperature ranges at relative humidity (RH) of <br />50% and air speed less than 0.15 m/sec. (30 fpm). <br />Acceptable Temperatures <br />Season ~ Clothing ~ Temperature <br />Winter Heavy slacks, long sleeve shirt 20-23.5°C <br />and/or sweater (68-75°F) <br />Summer Light slacks and short sleeve 23-26°C <br />shirt (73-79°F) <br />http://www.ccohs.ca/oshanswers/phys agents/hot coid.html <br />