Why it matters
The DELLA Serena 9,000 BTU 230V is rated at 9,000 BTU of cooling and 9,300 BTU of heating. On the ENERGY STAR room sizing chart that suits about 350 to 400 sq ft of average room. It needs a 230V (208/240V) circuit, which usually means an electrician if one isn't already at the spot.
Its 22 SEER2 ranks 2 of 10 among the mini-splits within about 12% of its capacity that we cover; the most efficient is the DELLA Optima 9,000 BTU 230V at 23. 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 24 dB at its quietest setting.
Installation needs the lines vacuumed and the valves opened after the line set is connected; most makers tie the warranty to a licensed installer. Warranty, per the listing: Lifetime coverage.
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 620 W power draw and user manual in the box.
Who it's for, and who should skip it
Good fit if
- Rooms of about 350-400 sq ft
- Large rooms and garages
- Lower running costs than most same-size systems
Look elsewhere if
- Primary heat in cold climates
- Spaces much larger than 400 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 22 SEER2
- 9,300 BTU heating stated
- Quiet indoor head (24 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 | 0.75 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 9000 BTU | Retailer |
| Features (seller) | Dehumidifier, Heating & Cooling Function, Remote Controlled, Sleep Mode, WiFi Enabled | Retailer |
| Dimensions (seller) | 7.87"D x 30.24"W x 11.77"H | Retailer |
| SEER (maker) | 22 | Retailer |
| Voltage | 230 | Retailer |
| Noise (seller) | 24 db | Retailer |
| Wattage | 620 | Retailer |
| Product weight | 16.5 lb | Retailer |
| Control | App, Remote, Voice | Retailer |
| Heating capacity (maker) | 9300 BTU | Retailer |
| Model number | 9K2VR-22S-M-I+O | Retailer |
| Warranty | Lifetime coverage | Retailer |
| SEER2 (maker) | 22 | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- ActiveTrail 17,000 BTU 230V Mini-Split
- Albott 18,000 BTU 230V Mini-Split
- Mountman 18,000 BTU 230V Mini-Split
- Nexaro 18,000 BTU 230V Mini-Split
All ductless mini-splits, compared in one table · Every DELLA product we cover
Final verdict
A sensible choice for a 350-400 sq ft room. Check that 9,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
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