An air intake system (10, 80, 100, 130, 170, 220, 250, 280) for a gas turbine; the air intake system comprising: (a) an inlet arrangement (12, 131, 132, 133, 174, 252) oriented to take in air to be used by the gas turbine; (b) one or more coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) in airflow communication with the inlet arrangement (12, 131, 132, 133, 174, 252) constructed and arranged to affect the temperature of the air; (i) each coil (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having: a frame having tubing held by and extending through the frame; and a plurality of spaced fins held within the frame; the tubing being in contact with the fins; and the tubing utilizing a working fluid of a predetermined temperature range conveyed therethrough; the fins being spaced apart to permit air to flow between adjacent fins as air flows through the coil; (c) an outlet duct (50, 86, 108, 152, 188, 228, 264, 290) downstream of both the coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) and the inlet arrangement (12, 131, 132, 133, 174, 252) and oriented to direct the air from the coils to the gas turbine; (d) characterized by at least one of the coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having a number of fins per 2.54 cm (per inch) that is different from the number of fins per 2.54 cm (per inch) of the other coils; or alternatively, one or more of the coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having at least one section with a number or fins per 2.54 cm (per inch) that is different from the number of fins per 2.54 cm (per inch) in other sections of the coil. (a) an inlet arrangement (12, 131, 132, 133, 174, 252) oriented to take in air to be used by the gas turbine; (b) one or more coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) in airflow communication with the inlet arrangement (12, 131, 132, 133, 174, 252) constructed and arranged to affect the temperature of the air; (i) each coil (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having: a frame having tubing held by and extending through the frame; and a plurality of spaced fins held within the frame; the tubing being in contact with the fins; and the tubing utilizing a working fluid of a predetermined temperature range conveyed therethrough; the fins being spaced apart to permit air to flow between adjacent fins as air flows through the coil; (i) each coil (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having: a frame having tubing held by and extending through the frame; and a plurality of spaced fins held within the frame; the tubing being in contact with the fins; and the tubing utilizing a working fluid of a predetermined temperature range conveyed therethrough; the fins being spaced apart to permit air to flow between adjacent fins as air flows through the coil; the fins being spaced apart to permit air to flow between adjacent fins as air flows through the coil; (c) an outlet duct (50, 86, 108, 152, 188, 228, 264, 290) downstream of both the coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) and the inlet arrangement (12, 131, 132, 133, 174, 252) and oriented to direct the air from the coils to the gas turbine; (d) characterized by at least one of the coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having a number of fins per 2.54 cm (per inch) that is different from the number of fins per 2.54 cm (per inch) of the other coils; or alternatively, one or more of the coils (36, 88, 122, 145, 146, 147, 150, 182, 230, 266, 292) having at least one section with a number or fins per 2.54 cm (per inch) that is different from the number of fins per 2.54 cm (per inch) in other sections of the coil.