Step 2/3 - Property Details 4. How much loft insulation does your property have? (mm)* ( Min : 0 - Max : 600 ) 100 Slide to indicate approximate depth of insulation in millimetres (0mm to 600mm) 5. What fuel is used to heat the property?* Mains gasElectricOilLPGBiomassSolid fuel (coal, wood, etc.)UnknownOther 6. How old is your heating system?* Recent upgrade (0-5 years)Moderately old (6-15 years)Aging system (20+ years)Unknown
