Hi, h

Has anyone come across issues with the chilled water pumps in the proposed and baseline building W/gpm being very different. It seems if you have a large building you will inherently have a high head so it doesn't seem right that the baseline uses 22W/gpm - equal to a pump operating against a 75 ft head, 65% combined impeller and motor efficiency. My building has 140 feet of secondary head and 50ft of primary head through the chiller plant which is 2,700 tons. This is 190ft of head giving me a primary of 15W/gpm and a secondary of 37W/gpm.