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t atc . <br /> . � . <br /> THE TOTAL ENVELDPE CALCUUTION MF.THOD <br /> The regulations state that alceroative overall "U" value� Eor bulldinP seccions nre pera�issable <br /> if it ia shovn that the tocal buildi�g envelope heat loss/�ain doea noc exceed that of a <br /> slmilar buildtng thet e�eets the regulation "U" value maximuns. In this case. ve vill consider <br /> only the valls and roof/ceilin� critecia, �ssuminy thrc the remainder of che builAinp. aeets <br /> regula[ie� requirements. <br /> A. Total heat los� es desiRned (valls a�d roof/eeilin�) B'fU/hr. deeree F. <br /> G'alls - UoAo � AveraRe "U" of . <br /> vall assembly x average vall area sq. ft. � <br /> Roof/Ceiling � UoAo � Averap.e "U" <br /> oE ceilinR x averaqe ceiling area sq, f[. � <br /> TOTAL <br /> B. Total heat loss if designed co meec the teRulation minieum (valls and roof/ceiling) <br /> lJalls � U A � iMinimum required <br /> 0 0 ��U" value of vall x average vall area s�. ft. � <br /> . � <br /> Roof/Ceiling � Uo o � :linimum reauired <br /> "U" value of <br /> eeiling x average ceiling area sq. ft. � <br /> TOTAL <br />