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--- efficiency_now:sufficiency [2022/08/24 13:56] – [Temporary reduction] wfeist
+++ efficiency_now:sufficiency [2022/08/24 14:05] (current) – [Heating with a fan heater] wfeist
@@ Line 46: / Line 46: @@
   * The electric power is converted 1:1 into heat with the direct electrical heating systems. Again, this causes a series of undesirable consequences:
   * Cost! The electricity prices for general household use nowadays are regularly much higher than the heat from commonly used heating systems: Even though oil and gas prices are high, the kilowatt-hour price from traditional heating is always lower than that of electricity. Households that regularly use fan heaters or other similar equipment will notice this in the electricity bill. Besides, the heating consumption in old buildings is much higher than average household electricity use. For this reason, as long as the traditional heating is working, we do not recommend using a fan heater.
-  * **Seriously fails the goal!** If the goal is to 'save gas' or limit CO2 emissions, then the user in most countries with significant heating needs will achieve the opposite 2). Especially in winter, when everyone uses a heating system, the electricity demand is higher, so there is usually no surplus from renewable energy 3). With the current renewable-energy limitations, fossil-fuel-based power generation is needed during this period. In the best conditions, this can achieve maximum efficiency of 55%. Each modern furnace using gas requires less fuel. With the fan heater, thus we consume even more gas and produce more CO2 than conventional heating. This situation might change with renewable energy, especially wind energy, in the future, but this will still need many years to be achieved.
+  * **Seriously fails the goal!** If the goal is to 'save gas' or limit CO2 emissions, then the user in most countries with significant heating needs will achieve the opposite. Especially in winter, when everyone uses a heating system, the electricity demand is higher, so there is usually no surplus from renewable energy. With the current renewable-energy limitations, fossil-fuel-based power generation is needed during this period. In the best conditions, this can achieve maximum efficiency of 55%. Each modern furnace using gas requires less fuel. With the fan heater, thus we consume even more gas and produce more CO2 than conventional heating. This situation might change with renewable energy, especially wind energy, in the future, but this will still need many years to be achieved.
 **The emergency - when the heating system fails**
-The traditional fan heater can reach 2 kilowatts (maximum). In an old building, a (small) single room may need to be heated using such equipment (when the doors 4) remain closed). This only works when all residents in that district don't have the same electricity demand. Otherwise, the electricity consumption in these areas will increase severely. This is the situation we don't want. Having several fan heaters in use simultaneously in the same building will quickly reach the limit of the electricity network's limit (not to mention the family's financial limit). In a supply crisis (e.g. for oil or gas), municipalities and energy companies will inform constituents and customers when and where fan heaters may be used, as well as how and by whom. They'll employ limited periods for energy use in different buildings and districts to do this. If this already unpopular approach doesn't work, it could cause even more significant problems with the electricity network.
+A traditional fan heater can reach 2 kilowatts (maximum). In an old building, a (small) single room may be heated using such equipment (when the doors remain closed). This only works when all residents in that district don't have the same idea. Otherwise, the electricity consumption in these areas will increase severely. This is the situation we don't want. Having several fan heaters in use simultaneously in the same district will quickly reach the limit of the electricity network's limit (not to mention the family's financial limit). In a supply crisis (e.g. for oil or gas), municipalities and energy companies will inform constituents and customers when and where fan heaters may be used, as well as how and by whom. They'll employ limited periods for energy use in different buildings and districts to do this. If this already unpopular approach doesn't work, this could cause even more significant problems with the electricity network.
-Thus, electric space heating should use a **heat pump system**, which only uses about one-third of the electricity to provide the same level of heat. This will also curb overall CO2 emissions. At least when the electricity isn't generated by coal.
+Thus, electric space heating should use a **heat pump system**, which only uses about one-third of the electricity to provide the same level of heat. This will also curb overall CO<sub>2</sub> emissions. At least when the electricity isn't generated using coal.
 ==== Literature ====