As part of the renovation is the air conditioning being improved? There are many reports that it is not reliable.
Sorry I didn't use it. It was cold when I stayed there. Setting the temperature in the room worked well though
Most people most days won't need much air conditioning, but we turned it on a little and it helped clear the air.
I had no issues with the air conditioning.
I have only been there in the Fall and Winter so I am not sure.
I had no problem with the heating or air conditioning.
Cannot really answer this. Though it didn't work in the room we stayed in.
I was unaware that the hotel was having any work done.
Get an answer from DoubleTree by Hilton Hotel London - Kensington staff and past guests.