Information on our assumptions for the calculations on the Instant Impact Activities page:
For "Turn off the Light" and "Choose Energy Saving Light Bulbs"
(1) "Turn off the Light " Household savings - The cost of running 1x60W bulb for an hour is - 10/1000 x 60 = 0.6p, where 10p/kWh is the average cost of electricity in the UK. Therefore, the annual cost of running 4 bulbs for 3 hours a day is 4x3x0.6x365 = £26.28.
(2) "Turn off the Light " All Sky Customers - Assuming 8.98 million customers and that ‘customer’ is equivalent to one household.
(3) "Choose Energy Saving Light bulbs" ’All statistics provided by Defra are based on CERT calculations and relate to an average three bedroom semi-detached home. For calculating overall savings to the UK, it has been assumed that all households with less than 150mm loft insulations would top up their insulation, all houses with empty but fillable cavities would insulate them, all houses would stop using standby and CFLs would be used in all suitable fittings.’(Source: Defra)
(6) "Choose Energy Saving Light bulbs" Savings assume replacing a traditional 100W tungsten filament (GLS) lamp with a 20W Compact Fluorescent Lamp (CFL), an electricity cost of 10p/kWh and 1,114 hours of use per year. The hours of use assumed is the average for the two most used lamps in a typical household. Replacing lamps of lower wattage or usage will give lower savings, though reductions in lighting electricity consumption of the order of 75-80% should still be expected. http://www.energysavingtrust.org.uk/energy_saving_assumptions
For "Switch off Vs Standby"
(1) Household saving - based on one TV, one video, one charger and one microwave.
(2) All Sky Customers - Assuming 8.98 million customers and that ‘customer’ is equivalent to one household.
For "Get Recycling"
All waste savings assume a 50% reduction of 352kg per person of residual household waste going to landfill. Also, figure does not include weights of waste already being sent for recycling/reuse or composting.
For "Get Out of the Car"
All savings assume all Eco Driving actions recommended by the Energy Savings Trust are followed and one car per household. The financial saving has been converted to a CO2 emissions saving using Defra GHG emissions conversion factors and AA Fuel Price Report November 2008.
Information on our assumptions for the calculations on the Longer Term Actions page:
’All statistics provided by Defra are based on CERT calculations and relate to an average three bedroom semi-detached home. For calculating overall savings to the UK it has been assumed that all households with less than 150mm loft insulations would top up their insulation, all houses with empty but fillable cavities would insulate them, all houses would stop using standby and CFLs would be used in all suitable fittings.’ (Source: Defra)