Take a look at success of efficiency and oil circulation fee of economic reciprocating compressors of various capacities dealing with propane (R290) as refrigerant Electrical power successful with reduce working expenditures – supplies heat by absorbing and going heat in the surrounding region in lieu of creating supplemental heat Oil https://oilon-heat-pumps09752.dreamyblogs.com/21605694/a-secret-weapon-for-hydrocarbon-heat-pumps