7. What is the principal source of energy for heating rooms?
[Question 7 was asked of households that heat their dwelling, as per question 6.]
[] 1 Electricity
[] 2 Supergas [LPG]
[] 3 Kerosene
[] 4 Wood
[] 5 Gas oil
[] 6 Fuel oil
[] 7 Piped gas
[] 8 Other