l live in a country with mild winters and hot Summers. During the Winter I have all the the house heated but include extra heaters in the guest bedrooms even though outside temperatures are 15 or above, There is really no need for them as the temperature in the house never goes below 20 degrees Celcius and guests have all have all the hot water they need. Now that summer is approaching I have had a couple of guests asking where the AC is (Though it is clearly stated that AC is not available in individual units). I am considering whether to install AC units in each room. What bothers me is that some of my guests are ( I am not going, to put it mildly), are irresponsible, leaving water running, heaters switched on when they are not in the room while keeping the windows open etc. If I had to install AC units in each room what are my options? I know of a person who has a guest house in my area who charges Euro 10 per night per room for giving them the remote control for the AC. I don't really like the idea but at the same time I do not want guests to abuse the system and keep an AC running at 16 degrees all day long. PS. I have asked companies which allow you yo connect an AC Unit to a coin meter but they are very expensive to set up, Any ideas, please?