Document 4Be8zeJyra5QQxZpo46Zk14V

806 CHAPTER 44 1948 Guide ment. The apparatus and items included in each group are stated in the footnotes beneath the tables. By use of these three tables it is possible to obtain a reasonable approximation of the cost of heating or air con ditioning a given space or building. In order to-use the approximate values indicated in Tables 1, 2 and 3, a rough estimate of the load is required. If time does not permit a determination of the load and if extremely rough figures will suffice. Table 4 may be used as an indication of the price of various types of air conditioning applications. Other first costs, incurred because of the installation of the air con ditioning or heating and ventilating system, include costs of electrical work, plumbing, miscellaneous piping, building alterations,. cutting, patching, remodeling, or redecorating. after installation, consulting engineer's fees, licenses, permits, etc. These vary so widely that no approximations are possible and each case must be considered alone. The length of the amortization period to be used depends upon: the type arid remaining life of the building or space for which the system is to be used; the type of equipment to be employed as a part of the system; the character of. the business; and the lease or ownership conditions. For small shops in rented quarters on short term leases, a period of 5 years or less may be proper, whereas for larger installations in buildings that are owned outright a period of 10 or 20 years or more may be used. , Depreciation due to deterioration and obsolescence must also be considered in arriving at the amortization period. Deterioration and Table 1. Typical Installed Costs of Heat Producing and Heat Distributing Systems Cost in Dollars--per Million Btu per HouR*b Btu PER . Hour (Millions) Sq Ft EDR (Steam) Thousands Boiler Horse Power 1 Boilers Water Tube 2 34 . Boilers Fire-Tubs Hot Water System Forced Circula tion Direct Radiation System Steam f 0.8 3.3 24 2100 8500 7850 1.2 5.0 36 2300 1750 8200 7600 1.6 6.6 48 . 2000 1570 8000 7350 2.0 8.3 60 1850 1460 7800 7200 3.0 12.5 90 1600 1230 7600 7000 4.0 16.6 119 1400 1100 7500 7000 5.0 20.8 149 1250 980 7500 7000 6.0 25.0 179 1160 920 7500 7000 7.0 29.2 209 1100 880 7500 7000 8.0 33.3 239 1050 850 7500 7000 10.0 41.6 299 1000 7500 7000 12.0 50.0 358 970 7500 7000 14.0 58.3 418 930 7500 7000 16.0 66.6 478 900 7500 7000 18.0 75.0 538 860 7500 7000 Columns 1 and 2 include hand fired boiler erected, with shaking grates and standard trimmings. Column 1 includes brickwork and rotating soot blowers. Foundations and piping are not included. Columns 3 and 4 indude direct radiation, piping, valves, specialties, and insulation. Boilers, condensate and circulating pumps, boiler connections, and all building construction or alterations are not included. bThe approximate figures given above may vary as much as 30 per cent due to job conditions, labor rates, and locality. These figures represent the selling prices of the individual items indicated above based on costs encountered in the year 1940. It is suggested that correction be made according to the particular i locality for increases in labor and material costs since that year. ' I f Owning and Operating Costs 807 Table 2. Average Installed Costs of Forced Air Heating and Air Conditioning Apparatus ___________ CFM Supply Air (Thousands) 5 10 15 20 30 40 60 80 100 120 140 160 180 200 1 Air Conditioning Equipment* 0.300 0.270 0.250 0.235 0.220 0.210 0.210 0.210 0.210 0.210 0.210 0.210 0.210 0.210 1 Cost per CFM--Dollars<i 2 Heating and : Ventilating Equipment** 0,210 0.180 0.155 0.140 0.120 0.110 0.110 0.110 0.110 0.110 0.110 0.110 0.110 0.110 34 Ducts Office Bldgs.* Ducts Specialty Stores* 0.340 0.330 0.325 0.320 0.310 0.305 0.295 0.290 0.280 0.250 0.249 0.247 0.245 0.240 0.235 0.230 1 o-Air conditioning equipment includes fans and drives, filters, heaters, spray dehumidifiers or cooling coils, automatic controls, apparatus casings and insulation, and recirculating pumps. bHeating and ventilating equipment includes, fans and drives, filters, heaters, automatic controls and ' apparatus casings. oIncludes ducts, grilles, outlets, insulation where required and specialties. dThe approximate figure given above may vary as much as 35 per cent due to job conditions, labor rates and locality. Figures are based on conventional systems. Building alterations,' piping, plumbing and wiring are not included. These figures represent the selling prices of the individual items indicated above based on costs encountered in the year 1940. It is suggested that correction be made according to the particular locality for increases in labor and material costs since that year. Table 3. Average Installed Costs of Refrigeration Systems and Water Saving Devices _________ Cost--Dollars Per Ton* Tons Refrig eration 1 Recipro cating (Water Cooling)* 2 3 .4 5 Centrifugal (Water Cooling)* Recipro cating Direct ExPANSlONb Evapo rative' Condenser* Cooling Tower ' Steel*! 6 Cooling Tower Wood*! 25 50 75. 100 150 200 250 300 400 . 500 147 132 125 120 115 113 : 110 137 124 _ 115 107 97 93 106 86 77 72 68 47: . 40 35 32 30 47 45 44 42 40 38 36 40 . 38 36 35 33 31 29 ^Columns 1 and 2 include compressors, evaporators, and water-cooled condensers; auxiliaries; electric motor, starter arid drive; refrigeration piping, refrigerant and insulation of cooler and suction lines. -Tur bine driven centrifugal equipment may cost about 4 to 6 per cent more than motor driven,, if condensing turbine and steam condenser, with supplementary equipment, are used. bColumn 3 includes same items as Column 2 except evaporator and auxiliaries are omitted. ^Column 4---These values are additive to Columns 1 and 3. ' ^Columns 5 and 6 include towers erected and a reasonable allowance for condenser water piping and pump9. \ .... - *The approximate figures given above may vary,as much as 25 per cent due to job conditions, labor rates and locality. Building alterations, supply water and plumbing connections, wiring, chilled water piping and pumps are not'included in these figures and may vary widely. Chilled water piping and pump costs may-vary between $10 and $50 per ton of refrigeration effect. These figures represent the selling prices of the individual items indicated above based on costs encountered in the year 1940. It is suggested that correction be made according to the particular locality for increases in' labor and material costs since that year.