What this usually means
SEER2 is useful for comparing rated equipment, but actual energy use also depends on climate, sizing, installation, ductwork, controls, maintenance and household operation.
Compare complete matched systems and documented ratings rather than a single outdoor-unit label.
What you can safely check
- AHRI-rated matched system
- Complete equipment model numbers
- Load and sizing method
- Installation and duct scope
When to call a professional
Ask for an efficiency comparison when planning replacement and request estimated tradeoffs in plain language.
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