Find out if your old appliance is worth replacing. Fill in the form with the current and new appliance power consumption, number of hours it stays on ( average ). To figure out how much power your old appliance consumes, you can use a power meter that you put into the socket.
Instructions
In the fields “Old appliance consumption” and “New appliance consumption” enter the consumption in Watts. To figure out how much power your old appliance consumes, you can use a power meter that you put into the socket. In hours/day field enter any value from 1 to 24. You can input decimal values like 2.5 ( for 2 hours and a half ). In price per kw you will enter the price per kw that you pay for your electricity bill. Enter the price in units of your currency. For example, if the price per kw is 12 cents, you will enter 0.12. In “New appliance price” field enter the cost to buy the new and more efficient appliance.
You will get an estimate on the difference in your electricity bill with the new appliance. If you complete the last field, you will also get a good estimate on when you will save more money than the light bulb cost.
Examples
Light bulbs. An incandescent light bulb consumes about 60W/hour. You write 60 in the first field. A LED light bulb equivalent consumes only 10W. You write 10 in the second field. In the third field you write the average hours it stays on during a day. An average living-room light bulb can stay on for 3-4 hours. The last 2 fields are optional. They are used to calculate the price difference from your electricity bill on a monthly and yearly basis. If you put the price of the new light bulb in the last field, you will get a good estimate on when you will save more than the light bulb cost.
Refrigerator. The technology shifts are the cause for better and more efficient appliances. This is the case for refrigerators too. You can look in the old refrigerator datasheet to find out how much energy your old refrigerator consume. This figure is based on a standard environment. Refrigerator consumption might be altered by the environment temperature, the room it is placed in, how often it is opened, how often food is added. To get a good estimate on how much a refrigerator consume you should use a power meter . You will find out the the hourly average that your refrigerators consume. Refrigerators using a condenser to cool food which works on an on-off basis. So instant power consumption might show the maximum power consumption or 0. To find out the average hourly consumption you should let the power meter in the outlet for few days. When looking on a new refrigerator, it will say how much electricity it consumes on a yearly basis in average conditions. Divide that number with 8760 ( the number of hours in a year ), and you will get the hourly average. In the hours field enter 24, because we are using averages and this means that it always stays on.