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Firing Rate vs Boiler Load

thread633-398045

Firing Rate vs Boiler Load

Firing Rate vs Boiler Load

(OP)
Hi there,

Can anyone explain or is there a graph on how firing rate relates to boiler load?
I'm wondering on how does combustion efficiency relates to boiler efficiency.
On my perspective, a boiler with a burner turndown of 4:1 (25% lowest firing rate) will have 4 different efficiencies (100% to 25%) but it does not take into account the boiler load.

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