Document 7MZdxYknRw1nEMKLyE7wq8OoV

Heating Ventilating Air Conditioning Guide 1938 Table 2. Conductivities (4) and Conductances (C) of Building Materials and Insulators--Continued The coefficients ore expressed in Btu per hour per square foot Per degree Fahrenheit per l in. thickness, unless otherwise indicated. Material Description oD t5<c *aB, oSd* Is EJ ii is os Ps 5a oo oo sV as 1gi & a0t t3f 3 1 < AIR SPACES FACED WITH BRIGHT ALUMINUM FOIL--Continued Air space divided in two with single curtain of bright aluminum foil (both sides bright) Each space over J^-in. wide 50 0.23f* 4.35 ) Each space H4n. wide -- 50 0.31f 3.23 (4) Air space with multiple curtains of bright aluminum foil, bright on both sides, curtains more than rin. apart, air circu lation between spaces prevented: 2 curtains, forming 3 spacra ........ ....... 50 O.lSf* 6.78 (4) 3 curtains, forming 4 spaces--__________ 50 O.ilf* 9.22 (4) 4 curtains, forming 5 spaces--__________ -- 50 0.09f* 11.66 (4) SPACES FACED WITH NON- METALLIC REFLECTIVE SURFACE Fabric with non-metallic reflective surface (J6 in* thick) placed in center of a in. air space Core at fibs' board coated two rides with non-metallic reflective surface (% in. thick) placed in space having approxi mately $ in. air space on each ride____ fiber board coated one ride with non- metallic reflective surface (% in. thick) 23.4 Air spaoe divided in two with fabric faoed both rides with non-metallic reflective surface, each space over M-in. wide Air space over %-in. wide faced one side with non-metallic reflective surface -- ____ --. 70 70 75 40 40 0.33f 3.03 (4) 0.27f 3.70 , (3) 0.49f 2.04 0.33f 0.67f .3.03 1.49 (4) (4) WOODS (Aeroes Grain) Bai.ha ___________ Caupobnia Redwood.. 0% moisture-- CtprbssDouglas Fm_. Eahtebn Hemlock-^.- Hian Maple__ 8% 16% 16% 0% mdstore-- 0% * - 8% * 8% 16% * 16% * - _. ,, 0% moisture-- 0% " 8% 8% 16% 16% *"- `,, 0% moisture-- 0% *- 8% * _ 8% * _ 16% " _ 16% ' ' For notes see Page 97. 102 20.0 90 8.8 90 7.3 90 22.0 7S 28.0 75 22.0 7S 28.0 75 22.0 75 28.0 75 28.7 86 26.0 75 34.0 * 75 26.0 ` 75 34.0 75 26.0 75 34.0 75 22.0 75 30.0 75 22.0 75 30.0 75 22.0 75 30.0 75 40.0 75 46.0 75 40.0 75 46.0 75 40.0 75 46.0 75 0.58 0.38 0.33 0.66 0.70 0.70 0.75. 0.74 0.80 0.67 0.61 0.67 0.66 0.75 0.76 0.82 0.60 0.76 0.63 0.81 0.670.85 1.01 1.05 1.08 1.13 1.15 1.21 1.72 (1) 2.63 U> 3.03 Cl) 1.53 (4) 1.43 (4) 1.43 (4) 1.33 (4) 1.35 (4) 1.25 HI 1.49 U) 1.64 (4) .1.49 (4) 1.S2 4) 1.33 (*) ` `1.32 (4) 1.22 (4) 1.67 (4) 1.32 " 4) 1.59 (4) 1.23 14} 1.49 (41 1.18 (4) 0.99 (4) 0.95 (4) 0.93 (4) 0.89 (4) 0.87 (4) 0.83 (4) - chapter 5. Heat Transmission Coefficients and Tables Table 2 iA Conductivities (4) and Conductances..(C) of Building Materials and Insulators--Continued --The coefficients --arc .e.xpMreesssseeds in Bln puenrlehsosuroptheerrsaqisueareinfdoiocat tpeedr.degree F..a...h..r..e..n...h..e...it.. per 1 in. thickness. Material Description P O Hg m cw a5 <s gS la S Q. $i 5 M 55 lg Ps Ps oo oo -i- iTio i | g as h SCKO O*SBO C* 05 *fc as 6 < WOODS--Continued LoitOLKAr Yellow Pine------ Nobwat Pine-------------- --R% a . Red Ctpeess.----------- ---- 8% o1L&U ouu.-. not Sbobtleap Yellow Pine..--. i i/rt n% 8% i fi% '1/5% ' R% R% 1/5% s Son* Maple_______________ n% R% 8% 1/5% 1/5%' n% % 8% lrf% lfi% VmniNiA Pn West Coast Hemlock______ 0% . 8%. White Prw* 8% ' 1 fi% 16% Yellow Ptw* Yellow Pm* on Fn * * . - ' * * For notes see Page 97. 30.0 40.0 40.0 30.0 40.0 34.3 44.3 22.0 .............. 22.0 32.0 22.0 32.0 32.0 22.0 ........................................ ' 22.0 32.0 38.0 48.0 38.0 48.0 38.0 48.0 26.0 36.0 26.0 36.0 26.0 36.0 28.0 34.0 28.0 34.0 28.0 34.0 . 36.0 42.0 36.0 ` 42.0 36.0 42.0 2210 28.0 22.0 28.0 22.0 28.0 34.3 22.0 30.0 22.0 30.0 22.0 30.0 31.2 75 75 75 75 75 75 86 86 75 75 75 75 75 75 75 '75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 75 ' 75 75 75 75 75 7S 75 75 75 75 75 75 86 7S 75 - 75 75 75 75 86 0.76 0.86 0.83 0.95 0.89 1.03 0.90 1.10 1.15* 0.62 0.74 0.6S 0.83 0.74 0.91 0.67 0.79 0.71 0.84 0.74 0.90 0.98 1.18 1.03 1.24 1.07 1.29 0.74 0.91 0.79 0.97 0.84 1.04 0.73 0.88 0.77 0.93 0.81 0.97 0.89 0.95 0.96 1.02 1.01 1.09 0.54 0.64 0.59 0.71 0.65 0.78 0.96 0.68 0.79 0.73 0.85 0.78 0.91 0.78 0.80* 1.32 1.16 1.21 1.05 1.12 0.97 1.11 0.91 0.87 1.61 1.35 1.47 1.21 1.35 1.10 1.49 1.27 1.41 1.19 1.35 1.11 1.02 0.85 0.97 0.81 0.94 0.78 1.35 1.10 1.27 1.03 1.19 0.96 1.37 1.14 1.30 1.08 1.24 1.03 1.12 1.05 1.04 0.98 0.99 0.92 1.85 1.56 1.70 1.41 1.54 1.28 1.04 1.47 1.27 1.37 1.18 1.28 1.10 1.28 1.00 1.25 (4) (4) (4) (4) (4) (4) a) in (4) (4) (4) (4) (4) (4) 4) (4) (4) (4) (4) (4) (4) (4) (4) (4) 4) 4) (4) (4) (4) (4) (4' (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (4) (1) (4) (4) (4) (4) (4) (4) (1) (3) 103