Document b5n4GpoZDmnQv8GBYXNe439ak

454 CHAPTER 22 1949 Guide I o >< > Q" PS ,, E 3 o > . s > w PS fti o03 fe Z B. a S-to 58 P 5 e 5 ^o sS' gc>2 2-1 0*^-5 cd o** -e> B ^StJ .I2 Pi '& eu -% s e 'g J J SS :H os M Hg -.Se3 T<8- ,Z s & <*) s is - ,.;o & -. o"Z J ; s _-8 w* _8 o "a- s a-. a a 5 8 a oN fC-Q ; < 128 S' s <CO=>: C - fCNO 't ` 2:' ` CQ: a. 2 ls_ a o ~tO to, 8-. ~ c> :g B -<E-I .I ^3 a .6? >S &aa! Sa |i Ja63..23fi IS-- - .1II l& s.$ E= 3 s Mechanical;Warn Ail Systems 455 Table 7. Determination of Free Area and Pressure Loss of 1 '' Register for 22 Deo Deflection of Air*' b-"'d- Rr.aister Free Area in Square Inches (Upper value in each group) tcegtster.r e r,,rh.,, Water (Lower value tn each group) ------------ Residential Use Cfm -------------Up to 59 -------------- 60-69 Reg. Size OB Equiv alent . 10x4 10x6 10 x 6 12 x 4 Pres sure Loss .01 .01 | '.01 .02 70-69 10 x 6 12x6 .02 .02 Cm Residential Use Reg. I Size ] OB Equiv alent 19 * ft Pres sure Loss .02 Cfm Distance From Register to Opposite Wall * If tarter selected baaed an ^""^^,3f**^hH'iI^tovStoob^1a2S?sS"S?rc^ter" Ujequire- loaa, it i* permissible to ahtft 5^,, nlareofmm and divide CFM capacity between the two registers, ^mentsf&il in blank space; select t a nlimTARLE BAR TYPE and does NOT Includeatackhead.:- c Une Aand A'Sfo^nTbe used in applications such as churches, auditoriums, and con- 0ert-1VJues on right of line B and B' ahduld not be used in applications inch aa residential work, motion picture then- ten. court rooms and schools. , # __ CFM-X144 For Boor and baseboard regiatere where a velocity of approximately 300 FPM is used, the free area r 300 or approximately,0TM. Aaeume ajpresaure.loss of .01.