A friend asked me to calculate electric consumption of her ballet classes.  So here’s a simple way of doing it.

1.) Determine the type, wattage and number of light bulbs you use.  Let’s say you have 2 tube T8 flourescent light bulbs (32W each) and 5 9W compact flourescent lamps. These are the little tubes you can screw into a light socket. Check this out at Murray Feiss.

2.) Determine the number and capacities of airconditioning systems you use.  IF you have 2 3hp A/Cs( 2130W) this means you have a combined load of 4260W

3.) Add the load together and multiply with the hours of use.

For 2 hours usage

2 TFLs – 64W

5 CFLs -45W

2 A/Cs – 4260W

Total Load – 4369W

Total Energy use – 8738 Wh or 8.7kWh

4.) You can multiply this with retail electricity cost to get usage cost or with the local grid emission factor to get your carbon emissions

8.7kWh x PHP9.50 = P82.65

8.7kWh x 0.5 kgCO2/kWh = 4.35 kg

I think a lot of us can make a good estimate of our electricity consumption for this.