The field guide
Mini splits
Cooling efficiency and heating output when it gets cold.
Compares · SEER2 / HSPF2 · 5°F capacity
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The numbers to know
SEER2, HSPF2, and 5°F capacity
SEER2 describes seasonal cooling efficiency; HSPF2 describes seasonal heating efficiency. Compare the exact indoor/outdoor match in AHRI. For winter performance, inspect NEEP heating output at 5°F, rather than nominal BTU alone.
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