Window type aircon (inverter)

[dr. d]

Seeking your opinions.

Many window-type A/Cs no longer has a drain hole. They deliberately flood the pan with condensate water to be splashed around the condenser to make it more efficiently at dissipating heat (evaporative cooling). The downside is, the collection of water in the pan is a cesspool for bacteria, algae, and other gunk to form. It also corrodes the condenser fins and any metal it comes in contact with, particularly the parts that are constantly submerged.

Now, against manufacturer recommendations, I'm planning to drill a hole at the lowest point of the pan so that water will not collect. I'm aware that I'll be losing some cooling efficiency with the condenser bone dry... but if it means preserving the metal parts from accelerated corrosion, it will probably still be worth it.

What do you think? Good idea? Bad?

if i were me, i'd drill that hole.
but i would also take pains to beautify the hole and paint the edges of the hole, to prevent rusting.