====== Boiler efficiency ======
The efficiency of a [[c_boiler_more|centralized]] or [[d_boiler_more|decentralized boiler]] is defined as follows:

$\eta = \frac{Q^-}{Q+}$
^$\eta$ |Efficiency [%] |
^$Q^-$ |Heat delivered by the boiler [W] |
^$Q^+$ |Heat delivered by the fuel combustion (LHV basis) [W] |