i do believe our meters are checked every other month, cause
there are just not enough manpower to check every meters in sg.
now, if U are unsure why you are charged so much, you can take
your own readings and submit, also, there is a meter that you can
install to check how much you are using in your unit so as to
ensure there is no "theft"..
and yes, air-con does consume, do you use other appliances like
microwave, water-heater, a high powered PC, etc? It does not
means two units will have the same bills if they on one
air-con,other factors too..
hence want to be sure, install a meter then you can compare and
know where you using..