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My Process cycle efficiency (PCE) for our emergency department project after calculation isbe 47.54%. As you have written between 10% to 20% is termed âGoodâ.
1 Efficiency: Furnace efficiency measures how much fuel a unit converts to heat, and how much is lost up the chimney. 2  The national minimum efficiency standard is 78%, while some new models are up to 98.2% efficient. 3  The latter cost more, but will cut fuel costs and are better for the planet. Efficiency: Furnace efficiency measures how much fuel a unit converts to heat, and how much is lost up the chimney. 2  The national minimum efficiency standard is 78%, while some new models are up to 98.2% efficient. 3  The latter cost more, but will cut fuel costs and are better for the planet.