- Qualifies if
- A single-zone mini-split whose listing states a SEER2 rating.
- Ranked by
- SEER2 (maker) (highest first)
- Shown
- The top 10 of 70 products in our catalog that meet the rule.
DELLA Optima 12,000 BTU 230V
The highest SEER2 (24) of the 26 mini-splits of this size we cover.
Cooper & Hunter 24,000 BTU 230V Mini-Split
The highest SEER2 (23.5) of the 11 mini-splits of this size we cover.
DELLA Vario 12,000 BTU 230V
23 SEER2, the 2nd best among similar-size systems we cover.
DELLA Optima 18,000 BTU 230V
The highest SEER2 (23) of the 16 mini-splits of this size we cover.
DELLA Optima 12,000 BTU 115V
Keeps heating down to -13°F, by the maker's rating.
DELLA Optima 9,000 BTU 230V
The highest SEER2 (23) of the 10 mini-splits of this size we cover.
DELLA Optima 23,000 BTU 230V
Keeps heating down to -13°F, by the maker's rating.
Temprium 12,000 BTU 115V Mini-Split
22 SEER2 with 115V power and R-32 refrigerant.
DELLA Serena 18,000 BTU 230V
22 SEER2, the 2nd best among similar-size systems we cover.
DELLA Serena 9,000 BTU 230V
22 SEER2, the 2nd best among similar-size systems we cover.
How to choose between them
SEER2 is the maker's seasonal cooling efficiency under the 2023 DOE test; each point higher cuts cooling energy by roughly 5% at the same output. Heating efficiency (HSPF2) and the low-temperature rating matter more in cold climates.
Compare within the same size: a small system with a high rating and a large one with a lower rating aren't competing for the same room. The running-cost calculator turns ratings into yearly kWh at your electricity price.
Rankings follow the rule and order stated above, using makers' published specifications and listed prices. How we research · Disclosure