These are new units and keeps blood and fluids warm between 37 - 42 degrees Celsius. Easy to set up and use. The Hotline Blood and Fluid Warmers deliver normothermic fluid at routine flow rates. It has a patented triple-lumen tubing design that eliminates patient line cool down and delivers warm fluids to your patients. disposable set up is easy and fast, and requires less priming volume than other routine flow fluid warmers.