recently purchased kenmore 5000 btu window airconditioner with CEER of 9.3 , uses 400 watts while cooling. there was no drain plug so after looking online i had seen that it splashes the water onto the cooling coils instead. have herd of mold issues so draining frequently might help keep tray clean longer.
here are better more efficient cooling units to consider.
for less humid hot places evaporative air conditioners might be a great option for you.
last resort options are putting icecubes near a window(frozen milkjugs) could also be placed into a bucket for forced air cooling. diy evaporative coolers might be an option too they work well for hot and dry climates.
airconditioner from a car
building underground or using underground pipes to cool filtered air.
brick or dirt covered houses
reflective white paint for rooftops with aluminum particles to increase albedo effect