Step 1 - Existing Window Details

This is the GGF Carbon Calculator

Just follow the easy to use steps outlined and the Carbon Calculator will show your energy and carbon savings in a matter of minutes.

Please select your current window & house type

Frame Type	Single Glazed	Double Glazed Windows Replaced before 2002
		4-6mm spacer	8-10mm spacer	12-14mm spacer	16-18mm Spacer	20mm spacer
Steel
Aluminium
Timber
PVC - U

House Type:

Detached
Semi / Bungalow / Other
Terraced
Flat