Carrier-081913-body.jpgCarrier has expanded its Evergreen® 19XR, XRV line of centrifugal chillers to include two-stage compression technology, providing building owners the choice of one or two stages to best tailor the solution to each unique site. The Evergreen 19XR, XRV centrifugal product line offers both single- and two-stage compression options from 800 to 1,600 tons. Company officials said the product is designed for flexibility. It can be configured to meet individual building and system design needs and can achieve Integrated Part Load Values (IPLV) as low as 0.31 kW/ton, exceeding ASHRAE 90.1