MODULE IV
Condensing boiler technology Page 17

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5. Condensing boiler technology based heating systems


Learning objective 3

Condensing boilers work in relatively low temperature ranges. The ideal working range for condensing boilers are forerun/reverse running temperatures of 40°C/30°C. So, the temperature spread is 10K.
But also heating systems with temperature ranges of 75°C/60°C or 55°C/40°C use the advantages of condensing boiler technology.
The diagram below shows the temperature curves as a function of the outside temperature for a heating system with 75°C/60°C:
  • Explain this diagram.
  • Explain why the reverse running temperature should maximally be 60°C.
  • Explain in which way the diagram is changing with a system temperature of 55°C/40°C and what effects that will have on the heating system.


 

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