Best efficiency
Mini-splitENERGY STAR
MRCOOL DIY 4th Gen 12K
Cooling
12,000 BTU
Covers
500 ft²
Efficiency
22 SEER2
Noise
32 dB
$1099 est.
via partner retailers Mini-split ENERGY STAR
Cooper & Hunter MIA 12K
by Cooper & Hunter · Model CH-RLS12MIA-230VI/O
C&H's best-selling MIA line packs 21+ SEER2 and included WiFi into a sub-$1,000 package.
Cooling
12,000 BTU
Covers
550 ft²
Efficiency
21.3 SEER2
Noise
23 dB
$899 est.
typical street price · via Amazon Is 12,000 BTU right for your room? Run the sizing calculator
Strengths & trade-offs
Pros
- WiFi adapter included in box
- Quiet 23 dB low fan speed
- Energy Star cold-climate certified
Cons
- Warranty needs licensed installer
- Brand support can be slow
What the Cooper & Hunter MIA 12K costs to run
Estimated from this unit's 21.3 SEER2 rating at 8 hours/day of cooling, using average residential electricity rates for each US climate zone. Your usage and utility rate will shift these numbers — run the calculator for your exact room.
| Climate zone | Example regions | Est. cost / month |
|---|---|---|
| Cool North | Pacific NW, Upper Midwest, New England | $25 /mo |
| Mixed / Temperate | Mid-Atlantic, Midwest, Mountain | $26 /mo |
| Hot & Humid | Southeast, Gulf Coast, Texas | $22 /mo |
| Hot & Dry | Southwest, Desert | $23 /mo |
Full specifications
| Type | Mini-split air conditioner |
| Cooling capacity | 12,000 BTU |
| Rated coverage | 550 ft² |
| Efficiency | 21.3 SEER2 |
| Noise (low) | 23 dB |
| Smart features | App, Scheduling |
| ENERGY STAR | Yes |
| Model number | CH-RLS12MIA-230VI/O |
| Typical street price | $899 |
Specs from manufacturer data; price and ratings are snapshots and may vary. See how we evaluate.
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Full comparison table Compare it against
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Senville LETO SENL-12CD
Cooling
12,000 BTU
Covers
550 ft²
Efficiency
21.2 SEER2
Noise
28 dB
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Pioneer Diamante WYS012
Cooling
12,000 BTU
Covers
500 ft²
Efficiency
20 SEER
Noise
34 dB
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