Experts tell you what electric fireplace to "waste" how much power?

The whole CaiNuanQi a square meters of electric heating operation cost can be according to the following formula:
The thermal load per unit area × × heat load coefficient every time CaiNuanQi × × days work unit price = the whole CaiNuanQi electricity per unit area of heating costs
Electric heating operation can be divided into the following several kinds of state:
(1) the user long time at home, electric cainuanlu 24 hours continuous operation, to save the operation cost of heating temperature appropriate night will be low.
Heating costs for: 0.06 kw/m x 0.6 x 10 hours x 140 days x 0.48 yuan/degrees = 24.2 yuan/m
(2) office worker, users only at noon, night at home, electric cainuanlu points 3 time intermittent operation.
Heating costs for: 0.06 kw/m x 0.6 x 6 hours x 140 days x 0.48 yuan/degrees = 14.5 yuan/m
(3) the office, five days a week, from Monday to Friday only in heating, power cainuanlu operation during the day, the rest of the time run in antifreeze state.
Heating costs for: 0.07 kw/m x 0.6 x 6 hours... (140 days times 5/7) x 0.48 yuan/degrees = 12.1 yuan/m
(4) the school, in addition to the duty of every week 5, and 35 days of vacation, heating time is short.
Heating costs for: 0.07 kw/m x 0.6 x 6 hours × ((140 days-35 days) x 5/7) x 0.48 yuan/degrees = 9.1 yuan/m
With the calculated value of the room above × actual heating area (practical area) can work out the whole CaiNuanQi about the operation cost, if the user adjust or close does not need to heating room (such as unused guest room, the bathroom or kitchen) in the implement, actual heating area is corresponding decreases, and heating costs will be reduced.
Note: 0.07 kw/m is the standard requirement of energy-saving building heating in winter heat load for 55-70 w/m
0.48 yuan/degrees is the Beijing residents of the electricity price, if the peak and valley electricity price according to an average of 0.35 yuan/calculating, the user long time at home heating cost is 17.6 yuan
The heat load coefficient 0.6 is to point to in the early period of the heating and end the heat load of the smaller indoor demand, in the period of the cold warm indoor heat load demand is bigger, take an average of 0.6
The actual heating area: building area is multiplied by 0.78, minus the practical need not be heating room area
Electricity cainuanlu is the intermittent work and electric water heater, air conditioning is similar, working time and the thermal load demand room in proportion
Each area of charge of electricity of unit price, heating cycle, electricity cainuanlu everyday work time is different, such as the northeast area while the weather is cold, but his house is better insulation measures (wall thick 0.5 m, external thermal insulation material, the window with double fan vacuum glass), electricity is cheaper, so its heating costs than shandong, Beijing area of less.
For example:
Building area of 100 square meters of three rooms one hall common bedroom, actually with an area of 78 square meters, the user long time at home, electric heating operation cost is as follows:
If all the rooms are heating and temperature of heating when sleep at night is reduced, the heating cost 0.48 yuan/Beijing electricity according to the calculation of about 24.2 yuan/square metre;