Why it matters
The DELLA Optima 18,000 BTU 230V is rated at 18,000 BTU of cooling and 19,000 BTU of heating. On the ENERGY STAR room sizing chart that suits about 700 to 1,000 sq ft of average room; the maker says up to 1,000 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 16 among the mini-splits within about 12% of its capacity that we cover, the top of that group. Heating efficiency is 10 HSPF2. The maker says heat-pump heating keeps working down to -13°F outside, hyper-heat territory. Indoor noise is listed at 34 dB at its quietest setting.
Like most split systems it ships pre-charged for a set line length; connecting it means flaring, pulling a vacuum and opening the valves, a licensed technician's job in most places. It uses R-454B refrigerant, one of the lower-impact A2L refrigerants new systems moved to in 2025.
The listing gives dimensions of 8.74 inD x 43.31 inW x 13.11 inH, a shipping or unit weight of 115.7 pounds, a 1,390 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 700-1,000 sq ft
- Cold-climate heating
- Lower running costs than most same-size systems
Look elsewhere if
- Spaces much larger than 1,000 sq ft
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 23 SEER2
- 19,000 BTU heating stated
- Heats down to -13°F
Cons
- 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 | 1.5 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 18000 BTU | Retailer |
| Features (seller) | Alexa Enabled, Heating & Cooling Function, Inverter Compressor, Remote Controlled, WiFi Enabled | Retailer |
| Dimensions (seller) | 8.74"D x 43.31"W x 13.11"H | Retailer |
| SEER (maker) | 23 | Retailer |
| Voltage | 230 V | Retailer |
| Noise (seller) | 34 db | Retailer |
| Refrigerant | R-454B | Retailer |
| Wattage | 1390 | Retailer |
| Control | App, Remote | Retailer |
| Heating capacity (maker) | 19000 BTU | Retailer |
| Model number | TPX-18K2V-23S-I+O | Retailer |
| Product weight | 115.7 lb | Retailer |
| Room size (maker) | 1000 sq ft | Retailer |
| SEER2 (maker) | 23 | Retailer |
| HSPF2 (maker) | 10 | Retailer |
| Heats down to (maker) | -13°F | Retailer |
Alternatives worth comparing
More ductless mini-splits we cover
- Senville AURA 24,000 BTU
- DELLA Optima 23,000 BTU 230V
- Senville AURA 33,000 BTU 230V
- Cooper & Hunter 24,000 BTU 230V Mini-Split
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 18,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
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