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Topic1 brief · in the index since September 25, 2026

Variable-speed compressor

Compressor that adjusts output by changing speed.

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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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