Chilling unit for evaporative air conditioning units

A method of retrofitting an evaporative air conditioning unit with a chilling unit, the method comprising:

• providing a chilling unit comprising:
• a frame, the frame comprising a bottom side and a top side opposite the bottom side;
• and
• a power supply;
• supplying water, via a water supply line, from the evaporative air conditioning unit;
• fluidly connecting a water block with the water supply line;
• placing a thermoelectric cooling device in heat exchange connection with the water block;
• electrically connecting the thermoelectric cooling device with the power supply;
• containing the power supply, water block and thermoelectric cooling device at least partially within the frame;
• fluidly connecting a water pump in the evaporative air conditioning unit to the water supply line, through an interface on the bottom side of the frame;
• cooling, with the thermoelectric cooling device, water in the water block;
• directing a water output from the water block through an interface on the bottom side of the frame and toward the evaporative air conditioning unit;
• connecting the power supply via a cable to a power source on the evaporative air conditioning unit, through an interface on the bottom side of the frame;
• and
• disposing the frame on the evaporative air conditioning unit such that the bottom side of the frame faces or contacts a surface of the evaporative air conditioning unit.