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
Della QC Series 12K
by Della · Model QC Series 12K 230V
Della's QC series is one of Amazon's cheapest credible 12K systems that still hits 21 SEER2.
Cooling
12,000 BTU
Covers
550 ft²
Efficiency
21 SEER2
Noise
25 dB
$749 est.
typical street price · via Amazon Is 12,000 BTU right for your room? Run the sizing calculator
Strengths & trade-offs
Pros
- Bargain price with WiFi and Alexa
- 25 dB whisper-quiet low mode
- Efficient R32 refrigerant
Cons
- Thin dealer and service network
- Warranty requires pro installation
What the Della QC Series 12K costs to run
Estimated from this unit's 21 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 | $27 /mo |
| Hot & Humid | Southeast, Gulf Coast, Texas | $22 /mo |
| Hot & Dry | Southwest, Desert | $24 /mo |
Full specifications
| Type | Mini-split air conditioner |
| Cooling capacity | 12,000 BTU |
| Rated coverage | 550 ft² |
| Efficiency | 21 SEER2 |
| Noise (low) | 25 dB |
| Smart features | App, Voice, Scheduling |
| ENERGY STAR | No |
| Model number | QC Series 12K 230V |
| Typical street price | $749 |
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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Cooling
12,000 BTU
Covers
550 ft²
Efficiency
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Noise
28 dB
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Pioneer Diamante WYS012
Cooling
12,000 BTU
Covers
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Efficiency
20 SEER
Noise
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