The Sun Frost RF19: one compartment is a refrigerator and the other a freezer. The freezer is twice as large as the freezer in the RF16; however, the refrigerator compartment is slightly smaller. The RF19 often eliminates the need to buy a separate freezer. Like the RF16 this model is typically mounted on a 13-inch high cabinet. The RF19 uses two quiet and highly efficient fans to cool the exterior cooling coils.