take into account different fuel grades being used for the fuel-oil combustion machinery item;

‘heat pump space heater’ means a space heater using ambient heat from an air source, water source or ground source, and/or waste heat for heat generation; a heat pump space heater may be equipped with one or more supplementary heaters using the Joule effect in electric resistance heating elements or the combustion of fossil and/or biomass fuels.

The heat pumps that do not use electricity, either use liquid or gaseous fuel to drive the compressor, or use an ad/absorption process (driven by combustion of liquid or gaseous fuel or by use of geothermal/solarthermal energy or waste heat) are delivering renewable energy as long as the ‘net seasonal primary energy ratio in active mode’ (SPERnet) is 115 % or larger than that value (7).

Article 3 of Directive 92/42/EEC excludes the following boilers: hot-water boilers capable of being fired by different fuels including solid fuels; equipment for the instantaneous preparation of hot water; boilers designed to be fired by fuels the properties of which differ appreciably from the properties of the liquid and gaseous fuels commonly marketed (industrial waste gas, biogas, etc.); cookers and appliances designed mainly to heat the premises in which they are installed and, as a subsidiary function, to supply hot water for central heating and sanitary hot water.

All residual (heavy) fuel oils (including those obtained by blending). Kinematic viscosity is above 10 cSt at 80 oC.

It includes gas produced by carbonisation (including gas produced by coke ovens and transferred to gasworks gas), by total gasification with or without enrichment with oil products (LPG, residual fuel oil, etc.), and by reforming and simple mixing of gases and/or air, reported under the rows ‘from other sources’.