On average, a fan oven typically uses between 2-3 kWh per hour when in use. This can vary depending on the temperature setting and cooking time.
In ten hours, a 200W bulb will use: 10 * 200 = 2000 Watt-hours = 2 kwh
The fan has a rated load of 2 kW. It is this wattage times the amount of hours the fan is used times the cost of a kWh in your area that the cost is based on.
It depends on the btu of the unit
About 11.75 cents per kWh for residential use (7.53 cents/kWh for industrial), as of September 2010:
To calculate the energy consumption in kilowatt-hours (kWh), use the formula: Energy (kWh) = Power (kW) x Time (hr) Given power of 32 watts and voltage of 220 V, first convert power to kW by dividing by 1000 (32 W = 0.032 kW). If you run the light for 1 hour, the energy consumption will be 0.032 kW x 1 hr = 0.032 kWh.
none, if it is unplugged
That depends on the type and make of Oven.
100 kWh
Look on the manufactures label on the fan. Find the amperage and voltage of the device. Multiply these two values together to find the wattage of the device. If the fan operates 24 hours a day, take the wattage and multiply it by the wattage of the fan. This will give you the total wattage that the fan will use in a day. To take it a step further take the total and divide it by 1000 and this will give you the kWh the fan uses. Find out what you are charged by the utility company and multiply the kWh by this number. This will tell you how much it costs to operate the fan for a 24 hour period.
You can do this in either a conventional or a convection oven. If you use a conventional oven, I would rotate the roasting pan half way through the cooking process to compensate for any hot spots in the oven. If you use a convection oven (with the fan), cooking is more even because the fan blows the hot air around the food, but you have to remember to reduce cooking temperatures 50 degrees if you leave the convection function on.
10 amps at 120 volts is 1200 watts or 1.2 Kw, so in 1 hour it will use 1.2 Kwh
In ten hours, a 200W bulb will use: 10 * 200 = 2000 Watt-hours = 2 kwh
Generally you deduct temperature not time for a fan assisted oven. For a recipe saying 200o use 180o on a fan assisted. Obviously all ovens are different but this should work.
The fan has a rated load of 2 kW. It is this wattage times the amount of hours the fan is used times the cost of a kWh in your area that the cost is based on.
It depends on the btu of the unit
Since there are 6366 hours in a year, 1930 kWh is about 0.3 kW per hour. (1930 / 6366)
A convection oven has a fan installed - to circulate the hot air that builds up. The use of the fan means the oven doesn't create 'cold spots' and thus the food cooks evenly. This speeds up cooking time - making the oven more cost-effective. A 'regular' oven has no fan, and thus has uneven temperatures throughout the cooking compartment.