Which WiFi Channel Frequency Bands Does WiFi Support?

DELLA supports the 2.4 GHz WiFi channel frequency band only.

How Do I Choose the Right Size for a Ceiling Cassette Mini Split AC?

The size of the Ceiling Cassette mini split AC depends on the room's dimensions and specific needs. For example: • A 400-square-foot room typically requires a 9000 BTU Ceiling Cassette Mini Split AC. • A 550-square-foot room needs 12000 BTUs. • A 1000-square-foot room needs 18000 BTUs. • A 1500-square-foot room needs 23000 BTUs.

Can I get longer extensions for this installation kit?

Yes, you can purchase a longer lineset separately. Please note, if the extended lineset is longer than 25 feet, additional refrigerant will be required. Make sure to consult a professional HVAC technician for proper installation.

What's Della Lifetime Coverage Ceiling Cassette Mini Split AC?

Register within 100 days for lifetime parts coverage. HVAC-licensed installs receive enhanced lifetime parts, while non-licensed installs receive limited lifetime parts. Note: Coverage is for parts only; labor costs are not included.

How Do I Clean and Maintain My Mini Split System?

Seasonally clean the reusable filters, inspect the condenser and evaporator units, and keep the area around the outdoor unit clear.

DELLA 18000 BTU Dual Zone Ceiling Cassette Mini Split AC (9K + 12K) - Up to 950 Sq.Ft.

SKU: 048-TLP-MODU-1D2-CC-D912

$2,769.96

Unit price: per

Limited Offer: Add this system and tower fan to your cart. Get the tower fan for $39.

Voltage: 230 Volts
Refrigerant: R454B
SEER2: 24
Climate Range: -13°F - 131°F

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Air Handler (9K)

Air Handler (12K)

DELLA 18000 BTU Dual Zone Ceiling Cassette Mini Split AC (9K + 12K) - Up to 950 Sq.Ft.

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Description

The 18000 BTU dual zone ceiling cassette mini split AC is designed for efficient cooling and heating in two separate areas, covering up to 950 sq. ft. with a 9K + 12K indoor unit configuration. Each zone can be controlled independently, making it a practical fit for bedrooms, offices, shops, restaurants, living spaces, and layouts with one smaller room and one medium-sized area. With a high 24 SEER2 rating, Energy Star-certified efficiency, inverter technology, and heat pump performance down to -13°F, it supports dependable year-round comfort while helping reduce energy use. The recessed ceiling cassette design keeps wall space open and delivers 360° airflow for even circulation, while quiet 32 dB(A) operation, DELLA App control, voice assistant compatibility, refrigerant leak detection, 24-hour timer, multiple fan speeds, Sleep Mode, Energy Saving Mode, dehumidifying, and auto modes make daily climate control simple and convenient.

What's included

Shipping & returns

Lifetime warranty

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Tech specs

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Indoor Unit Specs

Unit Dimensions (WxDxH):9K：22.44" x 22.44" x 9.65" ； 12K：22.44" x 22.44" x 9.65" ； PANEL(9K/12K/18K)：25.59" x 25.59" x 2.36"

Net/Gross Weight:9K: 32 / 38.6 ； 12K: 32 / 38.6 ； PANEL(9K/12K/18K)：6 / 9.5

Outdoor Unit Specs

Unit Dimensions (WxDxH):36.50"x14.94"x27.50"

Net/Gross Weight:92.6 / 99

System Specs

Voltage:230 Volts

Refrigerant:R454B

SEER2:24

Climate Range:-13°F - 131°F

No.1 Selling Mini Split Brand on Amazon

Ceiling Cassette: 360° Comfort, Zero Dead Zones.

Elevate your business environment with the Ceiling Cassette series—a powerhouse designed for maximum coverage and elite efficiency. Leveraging the same high-performance DNA as our Optima series, it delivers reliable Hyper Heat down to -13°F with a stunning SEER2 22-24 rating.

Its signature 360-degree airflow ensures consistent temperature distribution throughout any room, eliminating cold spots. With built-in fresh air intake support, it’s the ultimate professional solution for maintaining a healthy, comfortable, and energy-efficient atmosphere in any commercial or large-scale residential space.

Top performance, energy smart design

72% more efficient energy savings

Cleaner air, healthier living

Durable design, lasting comfort

Reliable Performance in Extreme Weather

Engineered to deliver dependable heating and cooling through intense summer heat and freezing winter conditions, helping maintain consistent comfort when outdoor temperatures become more demanding.

6 modes for max comfort

Auto mode

Maintain a comfortable indoor temperature by automatically switching between heating and cooling as needed

Wherever you are

Control your comfort, your way

Set schedules and timers through the Della+ app to match your daily routine.

Which series is right for me?

Model
Efficiency
HSPF2 Rating (Region IV)
Refrigerant
Climate Range
Energy Rebate
Shop Now

- DELLA 18000 BTU Dual Zone Ceiling Cassette Mini Split AC (9K + 12K) - Up to 950 Sq.Ft.
- SEER2 24
- 10.5
- R454B
- -13°F - 131°F
- DELLA Optima Series 18000 BTU Dual Zone Mini Split AC (9K+12K) - Up to 950 Sq.Ft.
- SEER2 24
- 10.5
- R454B
- -13°F - 131°F
- Shop Now
- DELLA Vario Series 20000 BTU Dual Zone Mini Split AC (9K + 12K) - Up to 950 Sq.Ft.
- SEER2 20
- 10.5
- R454B
- -13°F - 131°F
- Shop Now
- DELLA Serena Series 18000 BTU Dual Zone Mini Split AC (9K + 12K) - Up to 950 Sq.Ft.
- SEER2 22
- 10
- R32
- -13°F - 125°F
- Shop Now

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Customer Reviews

Overall rating: 5.0 / 5 from 1 reviews.

Product is Great! Very easy to install. Easy to use, and we are very happy with our purchase. However, the best thing is the product support! I had what I wasn't sure was a problem or normal operation. I called the support number, and not only did I get to speak to a real person right away, but she(Elizabeth) was actually the support person and answered my questions immediately. I am still in shock that I wasn't sent to an AI operator or someone overseas.

Sean H. 5/5 Verified September 19, 2026