DELLA 42000 BTU Tri-Zone Ceiling Cassette Mini Split AC (9K+12K+24K) - Up to 960 Sq.Ft.
The DELLA tri-zone ceiling cassette system delivers personalized comfort to every user in every room. Featuring three independently controlled ceiling units (one 9,000 BTU and one 12,000 BTU and one 24,000 BTU) powered by a single, high-efficiency outdoor unit, it's the smart way to manage multiple spaces up to 960 sq. ft. As an Energy Star-certified system, this customized comfort is also incredibly energy-efficient and may qualify for government rebates. With a robust heat pump for performance down to -13°F and full smart home integration, it offers a truly premium and flexible climate solution.
Tech Specs:
| Brand | Della |
| Voltage | 230 Volts |
| Refrigerant | R454B |
| SEER2 | 22 |
| Resources |
Lifetime coverage

Unmatched support that's best in class to give you peace of mind at no additional cost.

Durable & efficient.

Our mini splits feature gold plated fins that prevent rust corrosion, creating durable and efficient performance in both blistering heat and freezing cold.

Say goodbye to frost buildup!

Our bottom electric heating helps prevent frost from forming at the base of your model, speeding up defrosting and boosting efficiency.
How To Videos
Step-by-Step Guides for Easy Setup and Use
5 Urgent Steps Need to Know Before Installing Della Mini Split AC | Mini Split Installation Guide
Exploring Top Features Of Della App: Custom Geo Location Setup For Smart Home
How to Properly Connect Wires for Della's TL, Optima & Econo Mini Splits
FAQs
What kind of refrigerant does this use?
This unit uses R454B refrigerant. This unit comes pre-charged with R454B refrigerant for up to 75 feet of lineset. If your installation does not exceed this length, no additional refrigerant is needed.
Can I get longer extensions for this installation kit?
Yes, for multi-zone units, you can go back to the product options to select different lineset lengths for each indoor unit.Please note, if the extended lineset is longer than 75 feet, additional refrigerant will be required. Make sure to consult a professional HVAC technician for proper installation
When the unit is in auto mode, what will the room's temperature be maintained at?
In auto mode, the unit automatically switches between cooling and heating to maintain the set temperature. You can adjust the target temperature manually—typically between 60°F and 86°F —depending on your comfort.
Do the condenser lines come pre-vacuumed or do they have to be vacuumed?
The mini split condenser and lines are not pre-vacuumed. You will need to vacuum the system during installation to remove air and moisture before releasing the refrigerant—this is essential for proper operation and longevity.
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