Okay perhaps someone who has air conditioning at home can help me here.

When you have the ac on, do you notice a decrease on the output of the frequency of your cats urination??

My two have gone to almost nothing!

Air conditioning doesn't make a difference at all in my kitty. I don't see him drink much water, but he eats mainly wet food.

Nope, no difference here when I have the aircon on.
Maybe the hot weather has decreased their urination as they're a little more dehydrated.

Hydration levels seem to be normal. I was just wondering cause it's a relatively new thing that was installed about 6 weeks ago, obviously it's also extracting the humidity out of the air hence the question :)

We have the air conditioner on from May through sometimes September and it never makes a difference.

I haven't noticed a difference.