What does an energy meter measure?
Gas meters generally record the volume of gas consumed in cubic feet (ft3 ).
Electricity meters measure kilowatt hours (kWh) and you may see these marked on your meter. A kilowatt hour is a unit of measurement that is the amount of energy you would use if you kept a 1,000 watt appliance running for an hour. So, if you were using a 100 watt lightbulb it would take 10 hours to burn up 1 kWh of electricity. The more watts in an appliance the less time it takes, a 2,000 watt appliance would take 30 mins to use 1 kWh of energy.
Appliances can have labels or manuals that show their wattage – but generally electric showers, immersion heaters, room heaters and tumble driers are quite heavy users of power.