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Why do the condensing boilers keep working for a long time non-stop?
Condensing boilers generally have a modulation of 1:8 or even 1:10. The minimum power can make 24KW (modulation for 24KW boiler is 1:10). Non-condensing boiler, restricted by the burner, modulation of which can make 1:3, or even 1:3.5, though very hard.
When it approximates thermal equilibrium,the heat load is small. Condensing boilers can work at small load, and the temperature will not rise 2~3℃ higher than the set value. The boiler doesn’t stop but runs at low fire. Generally the heat output power can be increased (almost all condensing wall-hung boilers can be modulated)
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