41. Lowering the needle allows more of the working fluid into the evaporator to absorb heat. 42. Internally equalized valves can be used on single circuit evaporator coils having low pressure drop. 43. Sterilisation is carried out after the evaporator . 44. The evaporator is inside the HVAC control. 45. Seawater is pumped into an evaporator , where it is boiled by a heating coil. 46. As the evaporator works at pressure, not under vacuum, boiling may be violent. 47. The main advantage of climbing / falling film plate evaporator is its short residence time. 48. Despite its functionality, this evaporator has a few drawbacks such as large energy consumption. 49. Condensation drips from the evaporator fins into the housing, then goes out a drain. 50. When ambient air is allowed to come into contact with the evaporator , condensation results.