At the current place the bill is within the range of $90 - $95. The fan on the upper level is switched on 24 hours, together with the router, pcs and laptops, 2 cordless phone, intercom, 2 TVs, 2 2-doors fridge. Daily usage will consist of washing machine, dryer, vacuum cleaner, dishwasher, steam oven, cooking everyday, boiling water using electric kettle and the instant heater in my folk's room. Internet usage is 20 hours per day. We rarely use the aircon but the fans will be switched on in at least 4 of the bedrooms every night.