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Posted By: StuartBBoth are inefficient, the Tefal one cup uses the minimum amount of energy to 'boil' exactly what you need.
Posted By: evanAnd yes, it broke after a couple of weeks, whereas the kettle is still working 2 years later.
This is also why lowering your internal house temperature by 1 C can save 20% on fuel (those using the C scale plays a part here).
Posted By: SteamyTeaHeating water (or anything) follows an exponential curve. Hence it can take twice as much energy to raise it the final few degrees compared to the first (large) number of degrees.This is also why lowering your internal house temperature by 1 C can save 20% on fuel (those using the C scale plays a part here).
Posted By: DamonHDThe rule of thumb I understood was 1C to save 10% presumbably on the the basis of an average delta-T/difference between inside and outside of 10C on heating days and a nice olde worlde linear releationship between deltaT and heat demand.
Posted By: DamonHDStill much better to heat my house with gas at 0.19kgCO2/kWh rather than waste electricity heat at over 0.5kgCO2/kWh in winter... (And indeed cheaper.)
Posted By: Paul in MontrealPersonally, I don't drink tea anyway
Posted By: Hairlockselectric Kettle used 50% +/- 5% of the energy of the gas hob and saucepan.
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