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13 <br /> Orange County Page 9 of 9 <br /> Effective: January 1, 2006 <br /> Attachment <br /> From American Society of Heating, Refrigeration <br /> and Air Conditioning Engineers (ASHRAE) Standards <br /> 1. 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 /> http://industries.bnet.com/whitepaper.aspx?scname=Plumbinq+and+NVAC+Equ <br /> ipment&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 /> http://www.constructionbook.com/xq/AS P/Prod uctl D.3695/id.402/subl D.636/qx/def <br /> ault2.htm <br /> 3. ASHRAE Standard 55-1992 Thermal Environmental Conditions for Human Occupancy, <br /> recommends the following acceptable temperature ranges at relative humidity (RH) of <br /> 50% and air speed less than 0.15 m/sec. (30 fpm). <br /> ................................................................................................................................................................................................................................................................................................................................................................................................................................................... <br /> Acceptable Temperatures <br /> .....................................................e.as.o.n....,......................................................................................................C.I.ot.h.i.n.........................................................................,.........................................Te.m........e.ratu.re.... <br /> S g p <br /> ............................................................................................,.........................................................................................................................................................................................................................,........................................................................................................................ <br /> Winter Heavy slacks, long sleeve shirt ' 20-23.5°C <br /> and/or sweater (68-75°F) <br /> ............................................................................................,.........................................................................................................................................................................................................................,........................................................................................................................ <br /> Summer ' Light slacks and short sleeve 23-26°C <br /> shirt (73-79°F) ', <br /> http://www.ccohs.ca/oshanswers/phys aqents/hot cold.html <br />