With the exception of biogas treated to natural gas quality, which is fed into the natural gas network and can be burned in conventional gas boilers, the use of different fuels is associated with the use of different technologies. As far as fossil-generated heat is concerned, fuel oil (often in rural areas without natural gas grid) and natural gas (mainly in new constructions and conversion from oil to natural gas in the building stock) do dominate as fuels. The grid-bound natural gas consists to over 95% of methane (CH4) and it offers environmental advantages over fuel oil in the combustion: On the one hand, the specific CO2 emissions compared to fuel oil are lower by about 25% due to the high hydrogen content. On the other hand there are significantly less harmful emissions of SO2. In the case of fuel oil, which is in contrast to the natural gas stored and therefore delivered intermittently, a distinction is made between standard light fuel oil and low-sulphur fuel oil. The allowable sulphur limits are in the latter at a maximum of 50 mg/kg (according to DIN 51603 part 1) and will therefore be only one-twentieth of the allowable value for standard light fuel oil (up to 1,000 mg/kg).
makes energy efficiency in buildings and appliances transparent. For investors, policy-makers and actors involved in implementation and consultancy. Learn more ...
Buildings Guide 
Policy Guide 
Appliances Guide 
India
South Africa
