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Topic1 brief · in the index since September 25, 2026

Coefficient of performance

Ratio of useful heat moved to input work.

Every brief in the library that is about Coefficient of performance or leans on it for its answer, newest first. Each was written because somebody asked, and each cites its sources.

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Technology

How a heat pump warms a home when it is freezing outside

Air at -15°C still holds heat; a heat pump uses a refrigerant that boils far below zero to capture it, then compresses it to a useful temperature.

Explained3 min read5 sources

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