Heating and ventilating buildings : a manual for heating engineers and architects . /) 38 175 0 w < 4X 8 3%* ;. 3^x 7 23 35 7 6x 8 500 6x 8 35 4 X 10 3%x * 3*4 x 9 29 43 7H 8 5° 8x10 850 8x 10 45 4x11 3%x % 3*4 x 10 32^ 48 8 8 5° 8x12 1000 9x11 55 4x12 3%* 1% 3^4 xii 35 53 m 9 63 9x12 1250 IOX 12^3 60 4x14 3%* /s 3^4 x 13 4 63 9 9 63 IOX 12 1650 12 X 14 70 6x10 S%* .-?, 5MX 9 47 71 10 10 78 10 x 14 2000 12 x 17 80 6x12 S%* T->, 5*4*1. 58 .87 11 12 l>3 I2X 15 2300 14x17 5 6x14 5%x ;?•?, 554 x 13 68 102 12 12 i3 I2X I7 2600 15x18 120 6x16 5%x .s 5*4 x 5 79 119 »« 14 54 14 x 20 3000 15 x
Heating and ventilating buildings : a manual for heating engineers and architects . /) 38 175 0 w < 4X 8 3%* ;. 3^x 7 23 35 7 6x 8 500 6x 8 35 4 X 10 3%x * 3*4 x 9 29 43 7H 8 5° 8x10 850 8x 10 45 4x11 3%x % 3*4 x 10 32^ 48 8 8 5° 8x12 1000 9x11 55 4x12 3%* 1% 3^4 xii 35 53 m 9 63 9x12 1250 IOX 12^3 60 4x14 3%* /s 3^4 x 13 4 63 9 9 63 IOX 12 1650 12 X 14 70 6x10 S%* .-?, 5MX 9 47 71 10 10 78 10 x 14 2000 12 x 17 80 6x12 S%* T->, 5*4*1. 58 .87 11 12 l>3 I2X 15 2300 14x17 5 6x14 5%x ;?•?, 554 x 13 68 102 12 12 i3 I2X I7 2600 15x18 120 6x16 5%x .s 5*4 x 5 79 119 »« 14 54 14 x 20 3000 15 x 20 156 8x 18 7%* ~~s 7J4 x 17 124 186 >5 16 201 16 x 24 4000 20 x 20 210 10 x 20 9%x ??s 9)4 9 ,76 264 18 18 254 20 x 24 5400 20 x 27 270 10 x 24 20x35 340 Stacks for 4 inch studs carried in stock. Other sizes made to order.* This table is copyrighted by Excelsior Steel Furnace Co. as required. These registers are usually supplied with a seriesof valves which may be readily opened or closed. The. Fig. 211.—Register Boxes Shown in Position. space taken by the screen and valves is usually about ^ of thatof the register, so that the effective or net area is about f of HEATING WITH HOT A IK. 321 the nominal size of opening. These registers may be ob-tained finished in black or white japan, or electroplated withnickel, brass, bronze, or copper. The table on page 322 givesthe various sizes of registers which are regularly on the market,their effective area in square inches, and diameters of roundpipe having the same capacity. The areas of stacks may be considerably less than thoseof the registers, since it is generally required that the velocityof air entering the room shall not exceed 3 or 4 feet persecond, while that passing through pipes and stacks may havethe highest velocity possible, which for the different floors willnot differ greatly from 4 to 6 feet per second, as already ex-plained. For methods of proportioning ventilating flues seepage 233.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1910
