Why it matters
The DELLA Serena 12,000 BTU 230V is rated at 12,000 BTU of cooling and 12,300 BTU of heating. On the ENERGY STAR room sizing chart that suits about 450 to 550 sq ft of average room; the maker says up to 550 sq ft. It needs a 230V (208/240V) circuit, which usually means an electrician if one isn't already at the spot.
Its 22 SEER2 ranks 4 of 26 among the mini-splits within about 12% of its capacity that we cover; the most efficient is the DELLA Optima 12,000 BTU 230V at 24. The listing doesn't give a low-temperature heating limit, so treat it as a mild-climate heat pump until the maker confirms one. Indoor noise is listed at 22 dB at its quietest setting.
Expect a professional install: the copper lines are connected, pressure-checked and vacuumed before the refrigerant is released.
The listing gives dimensions of 7.87 inD x 30.24 inW x 11.77 inH, a shipping or unit weight of 16.5 pounds, a 1,000 W power draw and 1 x mini-split air conditioner, manual in the box.
Who it's for, and who should skip it
Good fit if
- Rooms of about 450-550 sq ft
- Large rooms and garages
Look elsewhere if
- Primary heat in cold climates
- Spaces much larger than 550 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 22 SEER2
- 12,300 BTU heating stated
- Quiet indoor head (22 dB)
Cons
- Low-temperature heating not stated
- Needs a 230V circuit
- Professional install recommended
Limitations to weigh
- Capacity and efficiency are the maker's ratings; real output depends on the install, the line length and the weather.
- Heat pumps lose heating capacity as it gets colder; size for your climate with the BTU calculator.
- The federal 25C tax credit ended for systems installed after 2025; check your utility for current rebates.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Capacity | 1 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 12000 BTU | Retailer |
| Features (seller) | Dehumidifier, Remote Controlled, WiFi Enabled | Retailer |
| Dimensions (seller) | 7.87"D x 30.24"W x 11.77"H | Retailer |
| SEER (maker) | 22 | Retailer |
| Voltage | 230 V | Retailer |
| Noise (seller) | 22 db | Retailer |
| Wattage | 1000 W | Retailer |
| Product weight | 16.5 lb | Retailer |
| Room size (maker) | 550 sq ft | Retailer |
| Model number | 12K2VR-22S-M-I+O | Retailer |
| Control | App | Retailer |
| Heating capacity (maker) | 12300 BTU | Retailer |
| SEER2 (maker) | 22 | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- COSTWAY 18,000 BTU 230V Mini-Split
- ActiveTrail 23,000 BTU 230V Mini-Split
- DELLA Vario 12,000 BTU 230V
- Cooper & Hunter 9,000 BTU 230V Mini-Split
All ductless mini-splits, compared in one table · Every DELLA product we cover
Final verdict
A straightforward choice for a 450-550 sq ft room. Check that 12,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
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