Document pmLNM2bRyRJMgVBL4j5nDEpQX

r 1 j 242 CHAPTER 18 : 1959 Guide --* ' Warm Air Heating Systems 243 \i i j Table 4.... Bhih Capacities and CFM of 6-Inch Feeder Ducts in Perimeter-Radial Systems in Concrete Slab Floors Section A. For Side-Wad and Floor Diffuser* Bm.nct Frame 0.1S in. Static Bonnet Temperature 170 F Table 5.... Btuh Capacities-and Cfm of individual Ducts in Perimeter Systems Used in Crawl-Space or Basement Construction Section A. For 5-tnd> Individual Bound Pioe and for Stde-wuB, Root, and Baseboard Diffuser* [ No. of Shows Copodfy 0 Btuh Cfm 1 Btuh am 2 Btuh Cfm 3 Btuh am 4 Btuh am 5 Btuh am 5 Actual length of Pipe from (ami fo Diffuser--Feef 10 IS 20 25 30 35 40 45 50 55 60 65 70 75 80 8700 8060 7460 6920 6430 5960 5550 127.7 124.8 122.3 119.7 117.4 115.0 113.0 8620 8000 7430 6900 6400 5930 5500 5100 122.8 120.0 117.6 115.3 113.0 111.0 109.0 107.3 8600 7960 7390 6860 6380 5940 5530 5150 4800 118.5 116.2 114.0 112.0 110.0 107.8 106.0 104.5 103.0 8640 8020 7450 6950 6460 6020 5600 5200 4850 4500 114.0 112.0 110.0 108.2 106.5 104.7 103.0 101.4 99.6 98.0 8760 8160 7580 7050 6540 6080 5640 5250 4880 4550 4250 110.2 108.4 106.6 105-0 103.0 101.5 100.2 99.0 97.5 96.0 94.5 8850 8250 7670 7140 6640 6170 5740 5340 4960 4620 4290 3990 106.8 105.0 103-5 102.0 100.5 99.0 97.5 96.0 94.6 93.4 92.0 91.0 No. of Elbowi Actual Length at Pipe From Bonnet to Diffuser--Foot 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 B0 0 1 2 3 4 5 '6- Btuh Cfm Btuh Cfm Btuh Cfm Btuh Cfm Btuh . Cfm Btuh Cfm Btub Cfm 8800 86.6 8250 81.0 7720 76.4 7280 72.5 8700 100.5 8620 7800 95.8 91.7 8700 7900 7180 90.8 87.9 85.2 8000 7300 6650 84.0` 81.5 79.3 7520 6850 6230 78.8 77.0 75.3 7050 6420 5840 74.5 73.0 71.6 6630 6070' 5530 71.2 69.8 68.5 7900 7150 6450 5800 5230 4700 96.2 92.7 89.7 87.0 84.6 82.5 7100 6470 5830 5350 4850 4370 88.7 86.0 83.8 81.6 79.7 77.7 6530 5950 5400 4920 4430 4050 82.7 80.7 78.9 77.1 75.4 73.6 6070 5530 5050 4600 4180 3800 77.5 75.8 74.3 72.8 71.3 70.0 5680 5180 4720 4300 3900 3550 73.7 72.2 70.8 69.5' 68.2 67.2 5330 4850 4430 4030 3650 3320 70.3 69.0 67-. 8 66.6 65.5 64.4 5050 4600 4180 3800 3470 3150 67.3 66.0 64.7 63.5 62.4 61.4 4230 3830 3470 80.4 78.4 76.5 3960 3600 3260 76.0 74.2 72.5 3680 3350 3040 72.0 70.5 69.2 3440 3120 2830 68.7 67.5 66.3 3220 2900 2630 66.0 65.0 63.6 3020 2730 2460 63.2 62.0 61.2 2850 2550 2280 60.5 59.5 58.1 3150 74.8 2950 71.2 2750 67.9 2550 65.2 2360 62.5 2200 60.2 2050 57.8 2860 73.2 2650 69.8 2480 66.7 2300 64.1 2120 61.5 1950 59.2 1820 57.0 2600 71.7 2360 68.5 2220 65.6 2060 63.0 1880 60.5 1730 58.1 1600 56.3 !: i; ;i U ;! 1. i ! Btuh 9050 8420 7840 7280 6750 6300 5850 5440 5060 4700 4370 4060 3760 ad.JdkitionEaql u12ivfatleeonitliLvaenlegntht laVnaclulhe*nuf sfaeodnat annddindciflfuudseedr ivinwcmatlcnunmlattiilnJgitMthiifsfotlable are: Diffuser and Boot -- SS ft; Plenum Takeoff -- 15 ft; Each Elbow -- 12 ft. For eacb ! Cfm 104.0 102.5 100.7 99.2 97.8 96.5 95.2 94.0 92.6 91.4 90.0 88.7 87.5 All etm values are hasad on standard air. j For Eqmvatait Length Value* used and mdufted in this table are: Diffuser and Boot - 40 ft; Plenum Take-off - It; Each Elbow = 14 ft. For each | additional 14 ft equivalent kagtb of boot and diffuser, count one additional elbow. Alldm value* are baaed on standard air. Soction B. For 6-Inch Individual Bound Pip* and for Side-woD and Floor Diffusers Bonnet Pressure 0.1S in. Static ... Bonnet Temperature 170 F J j. i 1 j Bonnet Preeenre 0.16 in. Static Section B, For Baseboard Diffusers Only ' Bonnet Temperature 170 F Actual Length of Pipe from Baanef fo Diffuse*--Feef j No. of Shows CapacOr j 5 10 IS 20 25 30 35 40 ; 45' 50 . 55 60 65 70 75 BO No. of Shows Actaot length of Pipe front Bonnet to Diffvtct--Feet 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 . Btuh Cfm 8700 8060 7460 6920 6430 5960 5550 127.7 124.8 122.3 119.7 117.4 115.0 113.0 1 Btub Cfm 8620 8000 7430 7900 6400 5930 5500 5100 122.8 120.0 117.6 115.3 113.0 111.0 109.0 107.3 j g 0 Btuh am 1 Btuh am 2 Btuh Cfm 3 Btuh am 8570 8000 7450 6910 6420 15960 5560 5150 4800 4450 4160 109.0 107.2 105.5 103.7 102.0 100.4 98.8 97.5 96.1 94.8 93.5 8700 8100 7550 7000 6520 6060 5630 5250 4860 4530 4220 3930 105.5 104.0 102.3 100.7 99.2 97.6 96.2 95.0 93.6 92.3 91.1 90.0 8890 8270 7700 7100 6660 6200 5750 5350 4980 4620 4300 4000 3700 102.8 101.3 99.8 98.2 96.7 95.3 94.0 92.7 91-5 90.2 89.0 87.8 86.5 8440 7870 7320 6820 6350 5880 6460 5070 4700 4350 4020 3710 3440 98.4 96.8 95.3 93.9 92.5 91.3 90.0 89.0 88.0 86.9 85.8 84.7 83.5 2 Btuh Cfm 3 Btuh Cfm 4 Btuh Cfm 5 Btuh Cfm 6 Btuh Cfm 8600 7960 7390 6860 6380 5940 5530 5150 4800 118.5 116.2 114.0 112.0 110.0 107.8 106.0 104.5 103.0 8640 8020 7450 6950 6460 6020 5600 5200 4850 4500 114.0 112.0 110.0 108.2 106.5 104.7 103.0- 101.4 99.6 98.0 8760 8160 7580 7050 6540 6080 5640 5250 4680 4550 4250 110.2 108.4 106.6 105.0 103.0 101.5 100.2 99.0 97.5 96.0 94.5 8850 8250 7670 7140 6640 6170 5740 5340 4960 4620 4290 3990 106.8 105.0 103.5 102.0 100.5 99.0 97.5 96.0 94.6 93.4 92.0 91.0 9050 8420 7840 7280 6750 6300 5850 5440 5060 4700 4370 4060 3760 104.0 102.5 100.7 99.2 97.8 96.5 95.2 94.0 92.6 91.4 90.0 88.7 87.5 * 4 Btuh am 8690 8080 7500 6980 6500 6030 5580 5180 4800 4450 4120 3820 3520 3250 95.8 94.4 93.0 91.6 90.3 89.0 87.8 86.7 85.7 84.6 83.7 82.6 81.6 80.5 5 Btuh am 8940 8320 7740 7200 6680 6190 5720 5320 4920 4550 4220 3890 3600 3350 3100 93.4 92.2 91.0 89.8 88.5 87.3 86.2 84.8 83.8 82.8 81.7 80.8 79.9 79.0 78.0 6 Btuh Cfm 8580 7960 7380 6850 6350 5880 5440 5040 4660 .4320 4000 3670 3400 3150 2930 90.0 89.8 87.6 86.5 85.5 .84.2 83.1 82-0 80.9 : 80.0 79.0 78.0 77.3 76.5 76.0 Tbe Equivalent Length Values used and ineltxfed in calculating this table are: Diffuser and Boo* - 100 ft; Plenum Takn-off --.JO ft; Each Elbow - 14 ft. For each 14 ft equivalent length of boo* and diffuser coon* one sdditiooal elbow. All cfm values are beaed on standard air. .ffj* Equivalent Length Valuta used and included in calculating this table are: Diffuser and Boot - to ft; Plenum Take-off - 20 ft; Each Elbow - 14 ft. For each additional 11 ft equivalent length of boot and diffuser count one additional elbow. All cfm values are based on standard air. / method explained in Chapter 12. Consider the basement or crawl space as a part of the structure and calculate its heat loss. Information m Manual 3* supplements that contained in Chapter 12, particularly mth respect to crawl-space heat losses. 2. Determine the required furnace-bonnet capacity from the heat loss of the building. 3. Locate the diffusers on the plan. Allow at least one diffuser for each exposed wall in each room or area of building, and locate them preferably beneath window areas. For residentiai installations limit eacb diffuser to a maximum of 7,000 Btub. 4. Determine the required Btuh delivery of each diffuser. Where more than one diffuser is used per room, proportion the heat (os equally among all diffusers. 5. Measure length and count number of elbows in each duct. From Table 5, determine the duct sixe (5 or 6-in. diameter) > ;j 1 j I ! '