Question post text
If Electricity, skip to Q30 (HH3AX3)
If Solar, skip to Q30 (HH3AX3)
If Gas (Industrial), skip to Q30 (HH3AX3)
If Gas (Biogas), skip to Q30 (HH3AX3)
If Paraffin, skip to Q30 (HH3AX3)
If Coal, skip to Q30 (HH3AX3)
If Charcoal, skip to Q30 (HH3AX3)
If Firewood, skip to Q30 (HH3AX3)
If Other, skip to Q29 (HH3AX2S)