Document nk9OeLJJe3az839V7oDXZxKxX

bb CHAPTER 20 1953 Guidii X. / J Table 3. Capacity Tables fob Warm Aib and Retdbn Aib Bbancii'es*. * ' FIRST STORY .For ATED Metal Ducts Actual Length (from Bonnet to Boot) or, (from Return Plenum to Boot) m Feet 1 to 7 FT. Col. a 8 TO 12 FT. 13 TO 1* 18 to 24 25 to & FT. FT. FT. 35 to 44 45 to 54 FT. FT. Col. b Col. c Col. d Col. e Col. f Col. g Warm Air Combi- NATION No. Return Air Combi nation Section A. 40 to.69 Equivalent . Ft for Fit tings and Register Section B. 70 to 99 Equivalent Feet 7200 12500 16000 19100 6700 11700 15000 18000 25000 23400 32000 30000 80000 75000 5500 9900 13100 16300 5100 9200 12300 15400 19800 .18400 26200 24600 65500 61500 6100 10800 14000 17000 21600 28000 70000 4800 8600 11600 14500 17200 23200 58000 5600 9900 13000 16000 19800 26000 65000 4500 8100 10900 13700 16200 21800 54500 4800 8500 11300 14200 17000 .22600 56500 3900 7100 9700 12200 14200 19400 48500 4100 7400 9900 12500 14800 19800 49500 3400 6200 8500 10800 12400 17000 42500 3500 6400 8700 11000 41 42 43 44 12800 17400 43500 45= 46= 3000 5400 7500 9500 41 .- 42 43 44 10800 15000 37500 45= 46= 51 52 53 54 55 56 57= 51 52 53 54 55 56 57= Section C. 100 to 129 Equivalent Feet 4600 8500 11300 14300 4300 7900 10600 13500 17000 15800 22600 21200 56200 .52600 4100 7400 10000 12700 14800 20000 50200 3800 6900 9400 11900 13800 18800 47300 3300 6100 8400 10500 12200 16800 42000 3000 5300 7400 9300 10600 14800 37000 2700 4700 6500 8300 9400 13000 32400 41 42 43 44 45= 46= 51 52 53 54 55 56 57= Section D. 130 to 164 Equivalent Feet 4100 7300 9800 12300 14600 19600 49200 3800 6900 9100 11700 13800 18200 45800 3600 6400 8600 11000 12800 17200 41900 3400 6000 8100 10300 12000 16200 40300 2900 5300 7200 9100 10600 14400 36000 2600 4700 6400 8100 9600 12800 31800 2300 4200 5600 7100 8400 11200 28100 41 42 43 44 45= 46= 51 52 53 54 55 56 57= Section E. 165 to 200 Equivalent Feet 3800 6500 8800 11000 13000 17600 4410) 3500 6100 8200 10600 12200 16400 41500 3300 5700 7700 9900 11400 15400 38800 3100 5400 7200 9300 10800 14400 36000 2700 4800 6400 8300 9600 12800 32000 2400 4300 5700 7300 8600 11400 28200 2100 3800 5000 6400 7600 10000 24700 41 42 43 44 45= 46= 51 52 53 54 55 56 57= Fob INSULATED 1 Col. a 1 to 9 - FT. Col. b 10 TO 17 FT. Col. c 18 TO 24 FT. Col. d 25 to 34 FT. Col. e 54 FT. COMFob Ducts that are PLETELY INSULATED with } In. Thick Insul- ation from Bonnet to Boot, use these Column Headings. b~ . 1,10,01 ^ TM wwng oo;n tne warm air and the return air branches, e TMtwmd reaistanas and temperature drops in ducts have both been accounted for in these tobies! two or fLT ^isterabUildin* wnatruction' r Paty requirements, necessitate the use of Forced Warm Air Systems 467: Table 4. Capacity. Tables fob. Warm-Aib and. Retdbn Aib Branches** b SECOND STORY 'Fob uninsu lated 'Metal Ducts Actual Length (fbom Bonnet to Boot) ob, (from Return Plenum to Boot) in Feet .- 1 to 7 FT. Col. a 8 to 12 FT. Col. b 13 to 17 18 to 24 25 to 34 35 to 44 45 to 54 ft. FT. FT. FT. FT. Col. c Col. d Col. b 'Col . f Col. g Warm '` ` / 'Return/ Combi- - Combi NATION nation ' No. ` , No. - A Section A. 40 to 69 Equivalent Ft for Fittings Register 6300 10900 14000 17000 5700 10000 13000 15900 21800 20000 28000 26000 70000 ; 65000 5200 9200 12100 14900 18400 24200 60500 4800 8500 11400 13900 17000 22400 57000 4100 7300 10000 12400 14600 20000 50000 3500 6400 8800 11100 12800 17600 44000 3100 5600 7800 9900 41 51 42 -52 43 53 44 54 11200 45= ! ; 55 15600 46= 56 39000 ' J. 57= Section B. 70 to 99 Equivalent Feet 5000 9000 11900 14800 18000 23900 59500 4600 8200 11000 13900 : 4300 7600 10300 13000 16400 15200 22000 20600 55000 51500 4000 7100 9600 12200 14200 19200 48000 3400 6200 8400 10800 12400 16800 42000 3000 5400 7500 9600 10800 15000 37500 2700 41, 4700. *42 6700 43 8500 44 9400 13400 33500 45= 46= --- ` 1 51 52 53 54 55 .. 56 57= Section C. 100 to 129. Equivalent Feet 4200 7700 10400 13000 15400 21700 52200 3900 7200 9700 12100 . 3700 6700 9000 11300 14400 13400 19400 18000 48400 45300 3500 6200 8400 10600 12400 16800 42300 3000 5400 7400 9400 10800 14800 37000 2600 4700 6500 8300 2400 4100 - 5800 7400 9400 13000 32500 8200 11600 29000' 41 42 ' 43 44 . 45= ' 46= -- 51 52 53 54 55 56 57= Section D. 130 to 164 Equivalent Feet 3800 6800 9100 11400 13600 18200 45500 3500 6300 8400 10500 12600 16800 42000 3200 5800 7900 9800 11600 15800 39600 3000 5500 7400 9200 11000 14800 36800 2700 4800 6300 8100 2300 4200 5700 7200 9600 8400 12600 11400 32200 ,28200 2100 3700 5000 6400 7400 10800 25100 41 42 - 43 44 45= 46= -- 51 52 53 54 55 56 57= Section E. 165 to 200 Equivalent Feet 3500 6100 8200 10300 12200 16400 41000 3200 5700 7600 9500 11400 15200 38300 2900 5300. 7100 8900 2700 5000 6700 8300 10600 10000 14200 13400 35800 33400 2500 4400 5700 7400 8800 11400 29000 2100 3900 5100 6500 7800 10200 25800 1900 41 , 3400 42 4500 43 5800 ' 44 6800 9000 22800 45' 46c .-- * 51 52 -53. 54 55 56 57 insulated Ducts Col. a 1 to 8 FT. Col. b 9 to 14 FT. Col. c 15 to 20 FT. Col. d 21 to 27 FT. C0I>. E 28 TO 42 Col. f 43 to 54 Fob Ducts that are COM-pletely insulated with i In. Thick Inbulati on from Bonnet to Boot Use thesb Column Hradings. * These tables are for use in sizing both the warm air and the return air branches. ** Frictional resistance and temperature drops in ducts have both been accounted for in these tables. 8 Use these items only when the building construction, or capacity requirements, necessitate the use of two adjoining stacks or floor registers.