Some cheapy charlies out there who never turn their air condition on, nor their hot water either, 555! I seldom turn on the main aircon in the living room before midday and at night I turn on the aircon in the 2 bedrooms before we go to bed and switch off a couple of hours later. The thermostats are set to 27 degrees C in the living room and 26 degrees C in the bedrooms. The compressors do cut out once the desired temperature is reached. Even with careful use the bill for this month is still 4,500 baht. During the winter months, and without the use of aircon, the bill never falls below 2,500 baht. Do I have a duff meter? Is there anyway I can get it checked?