efficiency computations to be performed for it and perform other tasks relating to it u201c add a chiller to this location u201d hyperlinks 94 relate to each of the listed chiller locations u201c admin bldg u201d and u201c central plant u201d in the example illustrated by the web page of fig5 in response to activating one of hyperlinks 94 the user is presented with a page such as that shown in fig6 a 6d the page allows the user to identify a chiller for monitoring and evaluation and enter various fixed or constant parameters for example the page includes a u201c chiller u201d text entry box 96 for entering a chiller number as multiple chillers at the same site are typically identified by a number e g u201c chiller 1 u201d a u201c make u201d selection box 98 for selecting the name of the manufacturer of the chiller a u201c model u201d text entry box 100 for entering the model number or name of the chiller a u201c serial u201d text entry box 102 for entering the serial number of the chiller a u201c refrigerant type u201d selection box 104 for selecting the type of refrigerant used in the chiller a u201c year chiller was manufactured u201d selection box 106 for entering the year in which the chiller was manufactured an u201c efficiency rating u201d text entry box 108 for entering the efficiency rating specified by the manufacturer or other source typically specified in units such as kilowatts per ton an u201c energy cost u201d text entry box 110 for entering the cost of one unit energy e g one kilowatt hour of electricity.