I'd appreciate hearing the views of other hosts about a situation, and whether you feel I am justified in asking for more money from the guests.
Over Christmas, while I was out of town for two weeks, I had a single booking for 5 days. This is the first time I have offered my whole flat. I returned home five days after the guests checked out.
Before they arrived, I sent the guests instructions for setting the thermostat. There are individual thermostats in each room (two bedrooms, two bathrooms, a living room/kitchen space, and the corridor). When I left home I had them set at 21C (ie 70F). For me that's enough, as the daytime sunlight raises the temperature about 3 degrees Celsius. Anything above 23 or 24 is too warm for me.
I do realise, however, that many people like their rooms to be warmer (particularly guests from East Asia, I have noticed), so sending instructions for the thermostat was something I felt was necessary.
When I returned home five days after the guests checked out, I opened the door to what felt like a blast furnace. The guests had left every single thermostat set at 29C (84F) which meant that in the daytime, the room temperature was at least 32C (in the windowless bathrooms, far higher). In one of the bathrooms, which both have underfloor heating, I was unable to walk on the floor for several hours because the floor was scorching. To have set the temperature so excessively high was bad enough, but to leave it like that as they left? Outrageously rude, in my view.
The scorching heat of the underfloor heating, which was left on for at least five days (and probably during their stay too), has led to the sealing between the floor tiles to dry out and crack, which has in turn led to tiles becoming loose. The tiles are quite large, so walking across the bathroom floor leads to the tiles tipping as you step on one side, then the other. I have no idea yet how much it will cost to repair.
Also, I read the electricity meter the day after I arrived home and submitted the reading to the electricity provider. It generated a bill much higher than normal. I take frequent readings (yeah, I'm that guy) so I always know what to expect when the bill comes.
So, am I justified in asking for damages and compensation for the higher electricity bill? I didn't actually ask them to turn down the heating when they left, but to me that was to be expected. That's basic courtesy and common sense, isn't it? I certainly wouldn't leave the heating set so high when I check out of a place.