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How HVAC Works
Plain-language explanations of ratings, refrigerants, heat pumps and HVAC terms.
- Learn How a Heat Pump Works — and Why It Fits Houston's Climate A heat pump heats and cools a home by moving heat instead of making it. In summer it works like a central air conditioner; in winter a reversing valve runs the cycle b… Read the guide →
- Learn SEER2 Ratings Explained: Texas Minimums and What the Numbers Mean SEER2 is the federal rating for how much cooling a central air conditioner or heat pump delivers per unit of electricity over a season; higher means more efficient. Te… Read the guide →
- Learn The Refrigerant Change, Explained: R-410A, R-32 and R-454B in 2026 New home air conditioners are moving from R-410A to lower-impact A2L refrigerants such as R-32 and R-454B under the federal AIM Act. In May 2026, the EPA removed the J… Read the guide →
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