Capital cost correlations are given for units supplying utilities: steam, refrigeration, cooling and treated water, electricity. Correlations available in the literature and current data are compared on a consistent basis. Thirty-two graphs show the relative magnitudes of the different correlations, and the recommended correlation for each type of equipment is given. Some factors are given on the costs of installing the package units.ost processes require such utilities as power, M cooling water, and sometimes industrial gases.In general, these utilities are purchased as installed packages or units. This article considers the costs of steam raising facilities, fired and unfired boilers, electricity generation from steam and nuclear power, refrigeration units, cooling towers and water supply and treatment.The purpose of this paper is to compare most of the published capital cost correlations on the same basis. This way a comparison can be made of the various articles that might be in our files. In addition, many of the costs are compared with current data. This is a paper in a series"-+) that attempts to survey the capital costs of most major equipment used in the process industry. In this series, cost data from a wide variety of sources are scaled via the Marshall and Swift index to the same basis, namely corresponding to a MS index value of 300. Where possible the data are compared with current prices, scaled backwards in time to the consistent base of MS = 300. Each utility service is considered separately. ( a ) Packaged boiler units For the packaged boilers, the delivered costs of all the pertinent equipment, excluding foundations, unloading, hauling to site and rigging, are summarized McMaster University, Hamilton, Ontario On prksente des corrklations relatives aux immobilisations de capitaux dans le cas dunitks de service gknkral (vapeur d'eau, rkfrigkration, eau de refroidissenlent et eau traitke, klectricitk). On compare, sur une base unique les corrklations qu'on trouve ~~~ 1.8 1.0 Bresler (6) Guthrie (9) 1.25 unfired.