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 9500 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.

How Do I Install a Ceiling Cassette Mini Split AC?

We recommend professional HVAC installation for best results, but Della also offers a Rental Kit with the tools needed for vacuuming and installing your Cassette mini split AC.

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

Our mini split systems come with comprehensive standard coverage—register within 100 days for lifetime parts coverage; HVAC-licensed installs receive enhanced lifetime coverage, while non-licensed installs receive limited lifetime parts coverage.

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 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.

SKU: CC-18K2V-20S-I+O-X

$1,784.96

Unit price: per

Cooling Capacity: 18000
Heating Capacity: 18000
SEER2: 20.5
Fitting Area: 1000
Voltage: 208-230
Refrigerant Type: R454B
Maximum Fuse Size: 20A
Copper Line Length: None / 10ft / 16ft / 25ft / 33ft / 50ft
Climate Range: -13°F - 131°F

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Line Set

DELLA 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.

Line Set: None

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30-day money-back guarantee

Free lifetime coverage

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Description

Achieve maximum climate control power with a minimalist aesthetic using the DELLA ceiling cassette air conditioner. This 18,000 BTU system installs flush with your ceiling, providing a discreet yet powerful solution for rooms up to 1000 sq. ft. The high-efficiency 20.5 SEER2 heat pump delivers year-round comfort in temperatures as low as -13°F, while operating at a quiet 37 dBa. Enjoy seamless smart home integration with voice assistants and the Della+ app, complete with energy-saving geo-location features.

What’s included

1. Outdoor Unit
2. Indoor Unit
3. Refrigerant Pipe (10ft / 16ft / 25ft / 33ft/ 50ft models only)
4. Drain Hose
5. Hose Clamp
6. Cable Clamp
7. Flexible Drain Hose
8. Copper Nut
9. Phillips Pan Head Bolt
10. Battery
11. Rubber Feet
12. Zip Tie
13. Communication Cable
14. Bracket Templat
15. Remote Control
16. Insulation Foam
17. Wall Sleeve
18. Cover Cap
19. Plastic Wrap
20. Plasticine Putty

Shipping & returns

Warranty

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Tech specs

Download User Manual

Indoor Unit Specs

Unit Dimensions (WxDxH):Indoor：22.50" x 22.50" x 9.63"； Panel：25.59"×25.59"×2.36"

Net/Gross Weight:Indoor：32 / 38.6； Panel：6 / 9.5

Outdoor Unit Specs

Unit Dimensions (WxDxH):36.50" x 14.94" x 27.50"

Net/Gross Weight:90.4 / 105.8

System Specs

Cooling Capacity:18000

Heating Capacity:18000

SEER2:20.5

Fitting Area:1000

Voltage:208-230

Refrigerant Type:R454B

Maximum Fuse Size:20A

Copper Line Length:None / 10ft / 16ft / 25ft / 33ft / 50ft

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 22-23 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

47% 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 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.
- SEER2 20.5
- 8.5
- R454B
- -13°F - 131°F
- DELLA 17000 BTU 20.3 SEER2 Concealed Ducted Mini Split Air Conditioner
- SEER2 20.3
- 10
- R454B
- -13°F - 131°F
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- DELLA 18000 BTU 20.5 SEER2 Floor Mounted Mini Split AC - Up to 1000 Sq. Ft.
- SEER2 20.5
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- DELLA Vario Series 18000 BTU 21 SEER2 Mini Split Heat Pump AC - Up to 1000 Sq.Ft.
- SEER2 21
- 9.5
- R454B
- -4°F - 122°F
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Frequently asked questions

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Customer Reviews

Overall rating: 5.0 / 5 from 4 reviews.

Customer photo review of DELLA 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.

Working great

Gabriel V. 5/5 Verified September 1, 2026

DELLA 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.

Installation was fairly easy (just had to be careful with power and condensate drainage requirements, plus proper refrigerant line connections, torquing, and line vacuuming). Unfortunately, when I started it up, I got a fan error on the Cassette. I called Della Support, and they immediately sent me both a replacement control board and a fan motor. I tried the board first with no luck, but the fan motor fixed it! Della Support was very responsive and helpful! Anyway, now I have a nice, cool garage! Does a really good job here in South Florida. Quiet operation both inside and outside.

Billp 5/5 Verified May 19, 2026

DELLA 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.

Everything is perfect

Phillip B. 5/5 Verified March 12, 2026

DELLA 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.

We use this for a large open space, and it handles it well. It keeps the temperature steady instead of constantly cycling on and off.

Michael A. 5/5 Verified January 6, 2026

DELLA 18,000 BTU 20.5 SEER2 Ceiling Cassette Ductless Mini Split AC - Up to 1000 Sq.Ft.