Literal question
<svar a="all" v="AT91A057 AT91A058">7. Main source of heating:<br /><div class="i1">[] Distance (block) heating, also community heating<br />[] Building central heating<br />[] Gas convection heaters<br />[] Built-in electric unit (permanently installed heater)<br />[] Central heating serving the dwelling (floor)<br />[] Individual stove</div><br />Fuel most used for heating:<br /><div class="i1">Only fill in if there is a central heating serving the apartment or an individual stove. Only mark one fuel, please.<br /><br />[] Wood<br />[] Coal, coke, briquettes<br />[] City gas, natural gas<br />[] Liquid gas<br />[] Fuel oil<br />[] Electricity (portable room heater)<br />[] Other fuel</div><br /></svar>