Are holes suppossed to be drilled into hot windowpane unit to allow hose to flow out?
No, new window do not need holes drilled into them.
As mentioned, most are designed to hold sea that is splashed on the hot coils to aid in value in very hot weather.
My guide talks about it. You might read that to your father. (I know ALL more or less working with a stubborn parent that assumes they have adjectives the answers. (grin).
So removing the water can lower the efficiency.
Most will come next to a removeable plug on the end if you do not want to it to hold water. My tentative one is that way. It also came beside another fitting to put in the hole which either directs the sea off the case or you can hook up tubing to it to direct the sea elsewhere.
In high humidity they say you might want to remove the plug to go and get rid of the excessive water.
Unless it quit working immediately the end is likely not a result of drilling the bottom.
Good Luck.
Answers: GOOD HEAVENS NO!! That was in the frail days. Most units built today have the large pressure lines (hot ones) at the bottom of the tray, immersed in the condesate water. That help to cool the refrigerant better and more efficiently. By design, some water should be contained by that tray!
I once worked for a know-it-all who ordered a coworker to drill drain holes in the bottom of a window part - a hissing sound ensued, as the drill bit hit a pressure string. The unit was ruined, and Mr. KIA have to buy a new unit for his client. Ha.
Don't pretend to know more than the engineers who designed your product unless you've gone through thermodynamics class.
If its a window type A/C, sea should drip outside of the unit. The base of the A/C component was designed to catch the dripping river created by the evaporator and there should be a slight elevation in a course that water will flow at the other side where the aircon condenser is located. This is where on earth a hole should be drilled at the base and placed with a hose for proper disposal of the dampen. No.
Some units use a sling-er on the fan blade that picks up the wet and throws it on the condenser coil to evaporate.
If it needed a drain hole it would already be there.
NO!
Window units already enjoy a built in water burrow in the bottom of the cabinet. The window component just needs to be tilted slightly to the outside so the river will drain.
When your father in law drills the cabinet he is probably drilling into fragment of the coil which will damage the unit.
Do not drill holes surrounded by the next one.
If you need a second view just ask the salesman to write that down on the receipt for you - consequently maybe your father in imperative will believe you, - but sounds like he won't believe anyone.