Abstract: An absorption heat pump system wherein the working fluid is a saturated fluorohydrocarbon or fluorohydrocarbon ether having from 3 to 5 carbon atoms.

Abstract: A mechanical vapor recompression heat pump system wherein the working fluid is a saturated fluorohydrocarbon or fluorohydrocarbon ether having from 3 to 5 carbon atoms or a fluorinated amine containing up to 6 carbon atoms and having the formula: ##STR1## wherein each of X and X.sup.1, independently, represents hydrogen or fluorine,R represents hydrogen or a lower alkyl radical,n represents an integer from 1 to 4,each of m and q represents an integer from 0 to 2,p represents an integer from 0 to 4 provided thatp is not zero when X.sup.1 is fluorine, andr represents an integer from 1 to 3;or the formula: ##STR2## wherein W represents hydrogen or fluorine, a represents an integer from 3 to 5, b represents an integer from 1 to 3 and c represents an integer from 0 to 2 provided that c is not zero when W is fluorine.