3. Primary type of heating
[] District heating or block heating
[] Building central heating
[] Gas convectors
[] Electric heating (permanently attached radiators)
[] Central heating system for apartment (single-story heating system)
Primary fuel used (Please mark just one fuel):
[] Wood Coal, coke, briquettes
[] Heating oil
[] Gas
[] Electricity (mobile electric heaters)
[] Other fuel
[] Individual stove(s)
Primary fuel used (Please mark just one fuel):
[] Wood Coal, coke, briquettes
[] Heating oil, fuel oil
[] Liquefied petroleum gas
[] Electricity (mobile electric heaters)
[] Other fuel