How we calculate
- Ratings (SEER2, EER2, HSPF2, capacities at 47/17/5°F, COP at 5°F, cold-climate flag, refrigerant, AHRI reference) come only from the ENERGY STAR Certified Mini-Split Heat Pumps dataset via its public API, retrieved 2026-10-17. Each row links its ENERGY STAR record.
- License: the dataset's metadata names the EPA Data License: EPA data is by default in the public domain (17 U.S.C. § 105). We do not use the ENERGY STAR mark, and EPA does not endorse this site.
- Grouping: ratings belong to an indoor + outdoor pairing. Unit pages group pairings by outdoor model. Exact duplicate pairings are shown once. ACIQ and 1HVAC brand listings (same partner) are grouped as ACiQ.
- Capacity classes by rated cooling capacity: 9k (<10,500), 12k (10,500–14,999), 18k (15,000–20,999), 24k (21,000–26,999), 36k (33,000–38,999) BTU/h.
- % capacity at 5°F = heating capacity at 5°F ÷ at 47°F.
- Cost estimates: kWh = capacity × full-load hours ÷ (SEER2 or HSPF2 × 1,000), × EIA residential rate (July 2026 (preliminary), EIA). Hours are user inputs or a "per 1,000 hours" yardstick; this ignores part-load behavior, defrost and backup heat, so treat it as a comparison tool, not a bill forecast.
Data gaps
- No prices, sound levels, warranty, line-set limits or installation requirements in ENERGY STAR data.
- We cannot tell single-zone from multi-zone reliably; units with more than 3 pairings are flagged as likely multi-zone/multi-option.
- Sizing needs a load calculation (e.g. ACCA Manual J); we do not size systems.
We do not test or install products, accept free products, or publish reviews.