Standard Fuel
Standard fuel - a unit of measurement for organic fuel used to compare the efficiency of various types of fuels and their aggregate accounting. The unit of standard fuel is defined as 1 kg of fuel with a calorific value of 7000 kcal/kg (29.3 MJ/kg). The commonly accepted abbreviation is kg eq. fuel (or t eq. fuel - tonne of standard fuel)
Source: Decree of the Government of Moscow dated September 14, 2011 No. 429-PP
"On Approval of the State Program of the City of Moscow 'Energy Conservation in the City of Moscow' for 2011, 2012–2016 and for the Perspective until 2020"