Why it matters
The DELLA 3-Zone (6K+9K+12K) 20,000 BTU 230V Mini-Split is rated at 20,000 BTU of cooling. It splits that capacity between 3 indoor heads, so size each head to its own room and check the total against the condenser. It needs a 230V (208/240V) circuit, which usually means an electrician if one isn't already at the spot.
Its 27 SEER2 ranks 1 of 3 among the multi-zone systems within about 12% of its capacity that we cover, the top of that group. The maker says heat-pump heating keeps working down to -22°F outside, hyper-heat territory. Indoor noise is listed at 26 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. Warranty, per the listing: Lifetime Coverage.
The kit pairs the condenser with a 6,000 BTU head (about 150-250 sq ft), a 9,000 BTU head (about 350-400 sq ft) and a 12,000 BTU head (about 450-550 sq ft), so each room should fall in its head's band. The listing gives dimensions of 7.68 inD x 32.28 inW x 12.05 inH, a shipping or unit weight of 20.7 pounds, a 1,395 W power draw and user manual in the box.
Who it's for, and who should skip it
Good fit if
- Whole floors with several rooms
- Lower running costs than most same-size systems
Look elsewhere if
- Owners who want to avoid a licensed install
Pros and cons
Pros
- 27 SEER2
- Heats down to -22°F
- Quiet indoor head (26 dB)
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 | 1.66 tons | Retailer |
|---|---|---|
| Cooling capacity (maker) | 20000 BTU | Retailer |
| Features (seller) | Dehumidifier, Heating & Cooling Function, Remote Controlled, Sleep Mode, WiFi Enabled | Retailer |
| Dimensions (seller) | 7.68"D x 32.28"W x 12.05"H | Retailer |
| Voltage | 230 | Retailer |
| Noise (seller) | 26 db | Retailer |
| Refrigerant | R-454B | Retailer |
| Wattage | 1395 | Retailer |
| Control | Remote | Retailer |
| Model number | 1D3-TPHX+T6912-X | Retailer |
| Warranty | Lifetime Coverage | Retailer |
| Product weight | 20.7 lb | Retailer |
| SEER2 (maker) | 27 | Retailer |
| Heats down to (maker) | -22°F | Retailer |
| Zones | 3 | Retailer |
Alternatives worth comparing
More multi-zone systems we cover
- Gree 3-Zone 24,000 BTU 230V Mini-Split
- ROVSUN 4-Zone (12K+12K+12K+12K) 38,000 BTU 230V Mini-Split
- Senville 4-Zone 36,000 BTU 230V Mini-Split
- Albott 2-Zone (12K+12K) 24,000 BTU 230V Mini-Split
All multi-zone systems, compared in one table · Every DELLA product we cover
Final verdict
A 3-zone system worth comparing. Check that 20,000 BTU fits your room with the BTU calculator before you buy.
Where to buy
Our links open this exact model's product page. Prices and stock change; check what's included before you order.
Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure