The column on the left shows the annual savings in pounds, and the column on the right, CO2 saving.

Action Cost saving in £pa kg of carbon pa
Update your Boiler to Condensing 230 1259
Install loft insulation to 270 mm 190 1039
Arrange Cavity Wall Insulation 150 799
Fit Double Glazing 130 712
Fit Draft Proofing 50 356
Turn your Thermostat down 1C 50 284
Install Floor Insulation 50 267
Fit Hot Water Tank Insulation 40 192
Change your Light Bulbs 40 135
Turn Devices off 30 126

Information taken from Energy Saving Trust website, and based on a 3 bedroom semi-detached house with gas central heating.

The column on the left shows the annual savings in pounds, and the column on the right, CO2 saving.

Update your Boiler to Condensing 230 1259
Install loft insulation to 270 mm 190 1039
Arrange Cavity Wall Insulation 150 799
Fit Double Glazing 130 712
Fit Draft Proofing 50 356
Turn your Thermostat down 1C 50 284
Install Floor Insulation 50 267
Fit Hot Water Tank Insulation 40 192
Change your Light Bulbs 40 135
Turn Devices off 30 126

Information taken from Energy Saving Trust website, and based on a 3 bedroom semi-detached house with gas central heating.