Document QXDReXQkGGxQqnz2BjvOVVk67

896 CHAPTER 43 1950 Guide ranted, or when only rough comparisons are desired between several types, approximate unit costs are of value as time savers. Approximate installed prices of the various parts are shown in Tables 1, 2, and 3 and, as indicated, vary with the size or capacity of the equip 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 re quired. If time does not permit a determination of the load, and if ex tremely 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 condition ing 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, Ucenses, 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 and 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 sihall shops in rented quarters on short term leases, a period of 5 years of Table 1. Typical Installed Costs op Heat Producing and Heat Distributing ; Systems -- Btu PER : Hour (Millions) SQ ft EDR (Steam) Thousands 0.8 1.2 1.6 2.0 3.0 4.0 . 5.0 6.0 7.0 . 8.0 10.0 12.0 14.0 16.0 18.0 3.3 5.0 6:6 8.3 12.5 16.6 20.8 25.0, 29.2 33.3 41.6 50.0 58.3 66.6 75.0 Boiler Horse Power 24 36 48 60 90 119 149 . 179 209 239 299 358 418 478 538 Cost in Dollars--per Million Btu per Hour*'** 1 2 34 . Boilers . Water Tube Boilers Fire-Tubs Hot Water System Forced . Circula tion Direct Radiation _ System Steam 2300 2000 1850 1600 1400 1250 1160 1100 1050 1000 970 930 900 860 2100 8500 1750 8200 1570 . 8000 1460 7800 \ 1230 7600 1100 7500 980 r - 7500 920 7500 880 7500 . 850 , . 7500: 7500 7500 7500 7500, 7500 7850 7600 7350 7200 7000 7000 7000: 7000 7000 70007000 7000 7000. .7000 7000 : .; .* Columns 1 and 2 include fired boiler erected, with grates and standard trimmings. Column 1 includes brickwork and rotating soot blowers: Foundations and piping are not included. Columns 3 and 4 include direct radiation, piping, valves, specialties, and insulation. Boilers, condensate and circulating pumps, boiler connections, ana all building construction or alterations are not included. b Thg 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 locality for increases in labor and material costs since that year. Owning and Operating Costs 897 Table 2. Average Installed Costs op 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 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 Cost per CFM--DouaesS 2 . Heating and Ventilating Equipment1* 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 Ducts' Office Bldgs. 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 * Air conditioning equipment Includes fans and drives, filters, heaters, spray dehumidifiers or cooling coils, automatic oontrols, apparatus and insulation, and recirculating pumps. b Heating and ventilating equipment includes fans and drives, filters, heaters, automatic controls and ap paratus casings. Includes ducts, grilles, outlets, insulation where required and specialties. d The 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 sinoe that year. Table 3. Average Installed Costs of Refrigeration Systems and Water Saving Devices Tons Refrig eration 1 Recipro cating (Water .Cooling) Cost--Dollars Per Ton 2 34 Centrifugal (Water Cooling) Recipro cating Direct Expansion^ Evapo rative Condenser 5 Cooling Tower STEELd 6 Cooling Tower Wood* 25 147 106 47 50 132 86 40 75 125 77 35 100 120 72 32 ; 47 40 150 115 137 68 30 45 38 200 113 124 44 36 250 110 115 42 35 300 107 40 33 400 97 38 31 500 93 36 29 * Columns 1 and 2 include compressors, evaporators, and water-cooled condensers; auxiliaries; electric motor, starter and drive; refrigeration piping, refrigerant and insulation of cooler and suction lines. Turbine driven centrifugal equipment may cost about 4 to 5 per cent more than motor driven, if condensing turbine and steam condenser, with supplementary equipment, are used. Column 3 includes same items as Column 2 except evaporator and auxiliaries are omitted. Column 4--These values are additive to Columns 1 and 3. 4 Columns 5 and 6 include towers erected and a reasonable allowance for condenser water piping and pumps. * 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 ousts may vary between 210 and 250 per ton ofrefrigeration effect. These figures represent the selling prices of the individual items indicated above based on coets enoountered 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.