Why it matters
The DELLA Optima 9,000 BTU 230V is rated at 9,000 BTU of cooling. On the ENERGY STAR room sizing chart that suits about 350 to 400 sq ft of average room; the maker says up to 400 sq ft. It needs a 230V (208/240V) circuit, which usually means an electrician if one isn't already at the spot.
Its 23 SEER2 ranks 1 of 10 among the mini-splits within about 12% of its capacity that we cover, the top of that group. Heating efficiency is 9.5 HSPF2. The maker says heat-pump heating keeps working down to -13°F outside, hyper-heat territory. Indoor noise is listed at 27 dB at its quietest setting.
Expect a professional install: the copper lines are connected, pressure-checked and vacuumed before the refrigerant is released. It uses R-454B refrigerant, one of the lower-impact A2L refrigerants new systems moved to in 2025.
The listing gives dimensions of 7.69 inD x 32.25 inW x 12.06 inH, a shipping or unit weight of 20.7 pounds, a 680 W power draw and air conditioner, manual in the box.
Who it's for, and who should skip it
Good fit if
- Rooms of about 350-400 sq ft
- Cold-climate heating
- Lower running costs than most same-size systems
Look elsewhere if
- Spaces much larger than 400 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 23 SEER2
- Heats down to -13°F
- Quiet indoor head (27 dB)
Cons
- Heating capacity not stated on the listing
- 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) | Alexa Enabled, Heating & Cooling Function, Inverter Compressor, Remote Controlled, WiFi Enabled | Retailer |
| Dimensions (seller) | 7.69"D x 32.25"W x 12.06"H | Retailer |
| SEER (maker) | 23 | Retailer |
| Voltage | 230 V | Retailer |
| Noise (seller) | 27 db | Retailer |
| Refrigerant | R-454B | Retailer |
| Wattage | 680 W | Retailer |
| Control | Remote | Retailer |
| Model number | TPX-9K2V-24S-I+O | Retailer |
| Product weight | 20.7 lb | Retailer |
| Room size (maker) | 400 sq ft | Retailer |
| SEER2 (maker) | 23 | Retailer |
| HSPF2 (maker) | 9.5 | Retailer |
| Heats down to (maker) | -13°F | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- DELLA Optima 12,000 BTU 230V
- DELLA Optima 12,000 BTU 115V
- DELLA Optima 18,000 BTU 230V
- Senville AURA 18,000 BTU
All ductless mini-splits, compared in one table · Every DELLA product we cover
Final verdict
A strong pick where winters reach -13°F. Check that 9,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
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