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Energy Carriers





Energy, as one of the most significant production factors and one of the goods and services needed for final consumption, has remarkable economic effects. Energy sector is considered as the main basis for development.  Energy carriers are consumed in all aspects of life and households play an important role in energy consumption. Hence, it is important to obtain statistics of the energy sector.

In recent years, data on energy consumption have been collected through including questions in questionnaires of manufacturing establishments but there is  still statistical  gap concerning energy consumption in household sector.  With respect to the necessity of collecting data on energy consumption by households of the country especially after implementation of “Targeted Subsidy Plan”, provision of the statistics on this sector is of special importance.

In this connection, Statistical Centre of Iran (SCI) managed to plan and implement the survey of energy carriers consumption in urban areas. The pilot survey was implemented in the month of  Shahrivar  1390 and after revising the results of the pilot survey, the  main survey was implemented  in  the month of  Bahman, 1390.  During the implementation of the survey, a number of 278 enumerators and revisers took part in the survey. The enumerators visited 15136 sample households in urban areas, collected the data related to the households through interview and registered them in the related questionnaires.

Definitions and concepts

City: every geographical area with a municipality during survey implementation.

Private household: persons living together in one residence, sharing their living expenses and eating together constitute a household. A person living alone also forms a private household. In terms of residence, private household is divided into two groups “Private settled household” and “Private unsettled household”.

Private settled household: a household living in a permanent residence made from hard materials, like fixed tent, hut, straw hut, etc.

Private unsettled household: a household not living in a permanent residence at the time of enumeration.

Collective household: persons who live together because of having common conditions (mainly common characteristics) and manage life affairs together.

Type of Housing units

·        Apartment housing unit:  a separate and independent unit in an apartment building which includes one or more rooms, usually its entrance leads to a common lobby or staircase. This type of apartment building is a building which has over one independent unit for residence, economic activity, etc. In this building, the yard, parking, lobby, staircase and… are common areas and are used in a shared manner.

·        Non- apartment housing unit (conventional): usually refers to one or two- storey building built for residence of a household and its entrance leads to a public passage and mostly it has a yard.  

Other types of housing units where households do not have  any other place to live . They include:

-         huts or straw huts

-         places of work  in  which  workers  sleep because they do not have  an independent place for residence (for example   a shop boy who sleeps in his place of work and does not any other place of residence,   the construction  workers who live in the buildings under construction or under demolition or in temporary places  in the  buildings under construction and

-          inns, hotels, caravans etc..    

Floor area of housing unit: Refers to all built roofed areas in a housing unit including room(s), kitchen, bathroom, toilet, storeroom, closet etc. In the apartment housing units, it refers to net floor area of the apartment regardless of common areas (parking, pilot, lobby or shared staircase, etc.). In these housing units, independent spaces of the apartment, even if they are located outside the apartment are considered as floor area like storeroom. Regarding non-apartment housing units, all built areas including lobbies, staircases, the ridge of a roof and basement are considered as floor area.        

Insulation of housing unit roof:

Insulation refers to materials that put off  or stop transmitting heat from one place to another one. Hence, insulators reduce energy losses. Insulating by special materials or by a multifunction system prevents transmitting heat and humidity from outside to the housing unit. To insulate a building, the materials such as Isogum[1], asphalt, bitumen, cob, gable roof, plastics, mosaic, etc can be used