Document 65NrxYgg1erdejYLO70E7Ywd

252 CHAPTER 18 1960 Guide Table 4.... Btuh Capacities and CFM of 6-Inch Feeder Ducts in Perimeter-Radial Systems in Concrete Slab Floors Section A. For Side-Wall end Floor Difhner* Bonnet Pressure 0.18 in. Static Bonnet Temperature 170 F No. of EZbows Capacity 5 Actual Length of Pipe from Sonnet to Diffuses--Poet 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 0 Btuh Cfm 8700 8060 7460 6920 6430 5960 5550 127.7 124.8 122.3 119.7 117.4 115.0 113.0 1 Btuh Cfm 8620 8000 7430 6900 6400 5930 5500 5100 122.8 120.0 117.6 115.3 113.0 111.0 109.0 107.3 2 Btuh Cfm 3 Btuh am 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 * 4 Btuh Cfm 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 5 Btuh am . 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 6 Btuh am 9050 8420 7840 7280 6750 6300 5850 5440 5060 4700 4370 4060 3760 104.6 102.5 100.7 99.2 97.8 26.5 95.2 94.0 92.6 91.4 90.0 88.7 87.5 F<w Eqaivslent Length Values need and included m calculating this table are: Diffuser and Boot -- 40 ft; Plenum Take-ofi - 20 ft; Each Elbow - 14 ft- For -- additional 14 ft equivalent length of boot and diffuser, count one additional elbow. All efm values an based on standard sir. Bonnet Pressure 0.18 in. Static Section B. For Baseboard Diffusers Only Bonnet Temperature 170 F Actual Length of Pipe from Bonnet to Diffvter--feet 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 0 Btuh am 8570 8000 7450 6910 6420 5960 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 ' 1 Btuh am 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 2 Btuh am 8890 8270 7700 7160 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 3 Btuh Cfm 8440 7870 7320 6820 6350 5880 5460 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 4 Btuh am 8690 8080 7500 6980 5500 5030 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 am 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 The Equivalent Length Value* used included ix addhinsTtl 14 ft equivalent length of boot and diffuser i All efm vidua are based on standard air. d Boot -- 100 ft; Plenum Take-off -- 20 ft; Each Elbow -- 14 ft. For eaeh Warm Air Heating Systems 253 Table 5____Btuh Capacities and Cfm of Individual Ducts in Perimeter Systems Used in Crawl-Space or Basement Construction Section A. For 5-tnch Individual Round Pipe and for Side-wall, Floor, and Bateboard Dtffaten Bonnet Pressure 0.15 in. Static Bonnet Tempcraivre 176 F No. of Bbewt Actual length of Pip* Prom Bonnet to Diffuse*--Feet 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 BO 0 Btuh Cfm 8700 7900 7150 6450 5800 5230 4700 4230 3830 3470 3150 2860 2600 100.5 96.2 92.7 89.7 87.Q 84.6 82.5 80.4 78.4 76.5 74.8 73.2 71.7 1 Btuh Cfm 8620 7800 7100 6470 5830 5350 4850 4370 3960 3600 3260 2950 2650 2360 95.8 91.7 88.7 86.0 83.8 81.6 79.7 77.7 76.0 74.2 72.5 71.2 69.8 68.5 2 Btuh Cfm 8700 7900 7180 6530 5950 5400 4920 4430 4050 3680 3350 3040 2750 2480 2220 90.8 87.9 85.2 82.7 80.7 78.9 77.1 75.4 73.6 72.0 70.5 69.2 67.9 66.7 65.6 3 Btuh 8800 8000 7300 6650 6070 5530 5050 4600 4180 3800 3440 3120 2830 2550 2300 2060 Cfm 86.6 84.0 81.5 79,3 77.5 75.8 74.3 72.8 71.3 7Q.0 68.7 67.5 66.3 65.2 64.1 63.0 4 Btuh 8250 7520 6850 6230 5680 5180 4720 4300 3900 3550 3220 2900 2630 2360 2120 1880 Cfm 81.0 78.8 77.0 75.3 73.7 72.2 70.8 69.5 68.2 67.2 66.0 65.0 63.6 62.5 61.5 60.5 5 Btuh 7720 7050 6420 5840 5330 4850 -4430 4030 3650 3320 3020 2730 2460 2200 1950 1730 Cfm 76.4 74.5 73.0 71.6 70.3 69.0 67.8 66.6 655 64.4 63.2 62.0 61.2 60.2 59.2 58.1 6 Btuh 7280 6630 6070 5530 5050 4600 4180 3800 3470 3150 2850 2550 2280 2050 1820 1600 Cfm 72.5 71.2 69.8 68.5 67.3 66.0 64.7 63.5 62.4 61.4 60.5 59.5 58.1 57.8 57.0 56.3 TTm* Equivalent Length Value* used and included in mlwilutiM this table are: Diffuser and Boot m 35 ft; Plenum Taka-off = 15 ft; Each Elbow 12 ft. For eaeh additk>nal 12 ft equivalent length of bootand diffuser count one additional elbow. Allcfm value* are baaed on standard air. Section B. For 6-tndi Individual Round Pipe and for Side-waD and Floor Diffuser* Bonnet Pressure 0.18 in. Static Bonnet Temperature 170 F Actual length of Pipe from Bonnet to Diffuser--Feet 5 10 15 20 25 30 35 40 45 50 55 50. 65 70 .75 80 0 Btuh Cfm 8700 8060 7460 6920 6430 5960 5550 127.7 124.8 122.3 119.7 117.4 115.0 113.0 1 Btuh Cfm 2 Btuh 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 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 3 Btuh Cfm -- 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 4 Btuh Cfm 5 Btuh Cfm 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 6 Btuh Cfm 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 The Equivalent Length Values used and i~`1i'lrr1 ip *> Diffuser aud Boot w 41 ft; Plenum Take-off " 20 ft; Each Elbow " 14 (V For each additional 14 ft equivalent length of boot and diffuser count one additional elbow. All dm value* are based on standard air. A anVsubject to limitations of: 1,000 to 1,200 sq ft maximum area, not more than approximately 15 ft along perimeter .'between diffusers, and no radial duct substantially longer than 20 ft, is the following: . 1. Calculate the heat loss of each room or area using the method explained in Chapter 12. For subfloor and edge losses, see* Manual 3 of the National Warm Air Heating and Air Conditioning Association. 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 dif fuser for each exposed wall in each room or area of the build ing and preferably beneath window areas. For residential in stallations, limit diffuser to a maximum of 7,000 Btuh.