Document vy6bD3d3QJV6er6qBY3O1RGOb

American Society of Heating and Ventilating Engineers Guide, 1924-25 TABLE 5. HEAT TRANSMISSION FROM WINDOWS, ROOF GLASS AND SKYLIGHT- 1.10 B.t.u.--.........................~............................................................................................. CLASS / V GLASS^ .WOOD 0.60 " 1.10 " GLASS %OLID / \ GLASS :............. ' 0.60 " ___ f GLASS wJF V. GLASS ........... . ^HOLLOW METAL --............... 1.10 " 0.60 " TABLE 6. HEAT TRANSMISSION FROM FLOORS ASSUME THE GROUND TEMPERATURE TO BE 50 FAHR. CONSTRUCTION B.T.U. CONCRETE .31 1.4. 4:\ti*v:v* "4- CONCRETE cinder fill q round ^rTILE ^CONCRETE round .29 .50 round .29 ^IJfcTWOOO FLOOR k^^>MWyiC'~3-CONCRETC ^"GROUND .10 SLEEPERS-' ^iV/WOOD FLOOR VrGN CRETE DER fill G ROU N D .07 G.,,,,,........ WOOD FLOOR .1 1 SLEEPERS-' SLEEPERS-' sf/i WOOD FLOOR ;0%r .13 TABLE 7. HEAT TRANSMISSION FROM CEILINGS ASSUME TEMPERATURE OF UNHEATED AIR SPACE TO BE 35 FAHR. WITH AN OUTSIDE TEMPERATURE OF 0?. CONSTRUCTION m epUntreated Space Piaster-^ LaTM BT-U. j60 Plaster'* "^.atb _-----Floor .11 Iiu 1 1 ll11'T?ii!Lj015t5 *=====' _ Metal Ceiliod .26 56. TMr"-- A0 -----Floor |ii^W|>A(liirci,tfTV^VfSi,7 Paper " . ---Joists ^-^Floor a Kciniorced ------ Concrete cSkSS? concrouzd z\ 41 IO0 36 41 36 14 American Society of Heating and Ventilating Engineers Guide, 1924-25 the number of B.t.u. which will be transmitted per degree difference in temperature per hour per square foot of surafce. The Research Bureau of the American Society of Heating and Ventilating Engineers are making heat transmission tests of different material and when results are published, all Heat transmission tables may be revised. TABLE 8. HEAT TRANSMISSION FROM INTERIOR WALLS Construction Plaster, Lath, Studs, Lath and Plaster...... Studs, Lath and Plaster..................... ............ 4" Hollow Tile, Plastered 1 Side.................. 4" Hollow Tile, Plastered Both Sides......... 2" Gypsum Block, Plastered 1 Side...-...... , 2n Gypsum Block, Plastered Both Sides._ B.t.u. 0.34 0.60 0.57 0.50 0.64 0.60 TABLE 9. HEAT TRANSMISSION FROM WOOD DOORS AND WOOD PARTITIONS to 1* Thick Tongued and Grooved = 0.65 B.t.u. l- " IK" IK" " 1K" IK" " 2" 2" " 2K" 2K" " 3- " " " " " = 0.60 " u u a = 0.50 " a a a = 0.42 " a a u = 0.35 " au u = 0.30 " TABLE 10. HEAT TRANSMISSION FROM WALLS OF VARIOUS CONSTRUCTIONS Thickness of Board in In. K" V IK" 2" 2K" Two Boards With Paper Between 0.32 0.24 0.19 0.16 0.14 B.tU.u. a u a Board and Corrugated Iron 0.45 B.t.u. 0.36 " 0.30 " 0.26 " 0.23 " Board and Sheet Iron 0.50 B.t.u. 0.40 " 0.33 " 0.28 " 0.25 " TABLE II. HEAT TRANSMISSION FROM WALLS OF CLAPBOARD Construction Clapboard, Sheathing, Studs, Lath and Plaster.................................... -............... Clapboard, Paper, Sheathing, Studs, Lath and Plaster with Sawdust Fill........ B.t.u. 0.62 0.48 0.34 0.57 0.37 0.30 0.40 0.36 0.31 0.21 0.15 15