GQL Statement
share_of_households_in_district_heating_demand = 
  DIVIDE(
    V(households_final_demand_lt_steam_hot_water,demand),
    V(energy_distribution_lt_steam_hot_water,demand)
  );
  lt_distribution_station_fixed_operation_and_maintenance_costs =
    SUM(
      Q(heat_infrastructure_lt_exchanger_station_fixed_operation_and_maintenance_costs),
      Q(heat_infrastructure_lt_sub_station_fixed_operation_and_maintenance_costs),
    );
  
  PRODUCT(
    lt_distribution_station_fixed_operation_and_maintenance_costs,
    share_of_households_in_district_heating_demand
  )
Result
| 2019 | 0.0 | euro | 
| 2050 | 0.0 | euro | 
Description
Annual maintenance costs of heat exchanger stations and substations for households,
by share of household heat demand in the total district heating network.
 
Characteristics
| Groups |  | 
| Unit | euro | 
| File path | /app/tmp/etsource/gqueries/output_elements/output_series/vertical_stacked_bar_lt_district_heating_costs_per_household/households_lt_outdoor_infrastructure_costs_per_household/support_queries/households_lt_distribution_stations_fixed_operation_and_maintenance_costs.gql | 
References