Limit values are: PM10– 50 µg/m3 24-hour average not to be exceeded for more than 35 days; NO2 – 40 µg/m3 annual average; SO2 –&nbsp;125 µg/m3 24-hour average not to be exceeded for more than four days; O3 – 120 µg/m3 8-hour daily maximum not to be exceeded for more than 25 days averaged over three years.
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– it doesn't need to be set higher than 60 ºC. The same goes for the boiler of your central heating. Remember, 70 % of the energy used by households in the EU is spent on heating homes and another 14 % – on heating water.
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