Afue

Guides in the Afue category — explained in plain English.

2 guides

AFUE vs SEER vs HSPF vs COP, in Plain English

HVAC ratings can feel like jargon. This guide explains AFUE, SEER, HSPF, and COP, what each measures, and how to compare systems without mixing apples and oranges.

Dec 25, 2025 8 min read

Aux Heat vs Emergency Heat, in Plain English

If your thermostat says Aux Heat or Emergency Heat, this guide explains what's happening, why costs can spike, and when you should (and shouldn't) use each mode.

Dec 25, 2025 6 min read

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