The gas pool heater can be turned on and off any time by the guests. The pool heater has a dedicated meter and the guest will be charged Euro 1.5/cubic meter at check out (pay per use). The gas necessary to bring the pool temperature to 30 degrees Celsius obviously depends on the outdoor temperature.
During the last 3 seasons the average daily cost to warm up the pool has been the following:
May & September: Euro 15-30
April & October: Euro 25-50
March & November: Euro 40-80