What kind of refrigerant does this unit use?

This unit uses R454B refrigerant. This unit comes pre-charged with R454B refrigerant for up to 24.5 feet of lineset. If your installation does not exceed this length, no additional refrigerant is needed.

What is the difference between R454B and R410A?

R454B is a new-generation eco-friendly refrigerant that complies with EPA regulations. It can replace the original R410A models, offering better performance and greater energy efficiency.

Can I get longer extensions for this installation kit?

Yes, you can purchase a longer lineset separately. If you buy it together with the Single Zone Mini split system, you’ll receive a 10% bundle discount. 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.

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. You can use our Rental Kit Service, which includes all the necessary tools for vacuuming and installing your mini split.

DELLA Optima Pro CloudAir Series 18000 BTU 23.5 SEER2 Ultra Hyper Heat Mini Split AC - Up to 1000 Sq.Ft.

SKU: TPHX-18K2V-23S-I+O

$1,849.96

Unit price: per

Cooling Capacity: 18000
Heating Capacity: 18000
SEER2: 23.5
Fitting Area: 1000
Voltage: 208-230v
Refrigerant Type: R454B
Maximum Fuse Size: 30A
Copper Line Length: 16.4ft
Copper Line Size: 1/2 inch and 1/4 inch
Climate Range: -22°F - 131°F

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DELLA mini split air conditioner single zone

DELLA Optima Pro CloudAir Series 18000 BTU 23.5 SEER2 Ultra Hyper Heat Mini Split AC - Up to 1000 Sq.Ft.

Voltage: 230V

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30-day money-back guarantee

Free lifetime coverage

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Description

The Optima Pro CloudAir Series 18000 BTU ductless mini split is engineered for high-performance year-round comfort with Ultra Hyper Heat technology, soft airflow comfort, and advanced smart controls. Designed for spaces up to 1000 sq. ft., this mini split heat pump delivers efficient cooling and dependable heating operation down to -22°F for reliable comfort even in extreme winter conditions. Featuring soft, indirect airflow technology, it helps reduce direct drafts while maintaining smoother and more even air distribution throughout the room for a more comfortable indoor experience. Operating at sound levels as low as 34 dB in Mute Mode, it is ideal for bedrooms, living rooms, apartments, and home offices where quieter operation matters. Smart features include Alexa and Della+ app compatibility, the “I Feel” temperature sensor, and precise remote climate adjustment for more personalized comfort control.

What’s included

1. Indoor Unit
2. Outdoor Unit
3. Refrigerant Pipe
4. Drain Lines
5. Remote Control
6. 2 AAA Batteries
7. Screws
8. Anchors
9. Mounting Plate
10. Insulation Foam
11. Wall Sleeve
12. Rubber Feet
13. Plasticine Putty
14. Drain Elbow
15. Wall cap
16. Plastic Wrap
17. Communication Cable
18. Bracket Template

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Tech specs

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Indoor Unit Specs

Unit Dimensions (WxDxH):43.18" x 13.07" x 8.74"

Net/Gross Weight:30.9 / 35.2

Outdoor Unit Specs

Unit Dimensions (WxDxH):36.5" x 14.96" x 27.52"

Net/Gross Weight:93.7 / 110.2

System Specs

Cooling Capacity:18000

Heating Capacity:18000

SEER2:23.5

Fitting Area:1000

Voltage:208-230v

Refrigerant Type:R454B

Maximum Fuse Size:30A

Copper Line Length:16.4ft

Copper Line Size:1/2 inch and 1/4 inch

Climate Range:-22°F - 131°F

No.1 Selling Mini Split Brand on Amazon

Optima Pro CloudAir: Engineered for the Absolute Extreme. Comfort Perfected.

When the temperature drops, most heat pumps give up. The Optima Pro CloudAir steps up. Featuring advanced Ultra Hyper Heat technology, it delivers reliable warmth down to -22°F while maintaining 100% heating capacity at 5°F.

Now boasting an elite 25 SEER2 rating and ENERGY STAR® certification, it’s not just a heater—it’s an ironclad guarantee of year-round comfort and maximum energy savings for the harshest environments.

The Pro CloudAir Series also features soft, indirect airflow technology that minimizes harsh direct drafts for a smoother, more comfortable cooling experience.

Top performance, energy smart design

68% more efficient energy savings

Cleaner air, healthier living

Durable design, lasting comfort

Reliable Comfort in Extreme Cold

Designed to maintain dependable heating performance in severe winter conditions while delivering reliable cooling through intense summer heat.

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
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- DELLA Optima Pro CloudAir Series 18000 BTU 23.5 SEER2 Ultra Hyper Heat Mini Split AC - Up to 1000 Sq.Ft.
- SEER2 23.5
- 10
- R454B
- -22°F - 131°F
- DELLA Optima CloudAir Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
- SEER2 23
- 10
- R454B
- -13°F - 131°F
- Shop Now
- DELLA Serena CloudAir Series 18000 BTU 22 SEER2 Mini Split Heat Pump AC - Up to 1000 Sq.Ft.
- SEER2 22
- 9.5
- R32
- 5°F - 125°F
- Shop Now

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Customer Reviews

Overall rating: 5.0 / 5 from 3 reviews.

Customer video review of DELLA Optima Pro CloudAir Series 18000 BTU 23.5 SEER2 Ultra Hyper Heat Mini Split AC - Up to 1000 Sq.Ft.

This was the third Della that I’ve installed at our house. The first one looked like I installed it the second looked much better but this one looks even better. I sent videos to marketing @della for you to see. With this one I’ve noticed certain design changes that make it easier to assemble.

Jerry L. 5/5 Verified August 20, 2026

DELLA Optima Pro CloudAir Series 18000 BTU 23.5 SEER2 Ultra Hyper Heat Mini Split AC - Up to 1000 Sq.Ft.

Because Montana, I needed the heater option. Most systems offered heat down to 5°, but i need heat for winter too, so the ultra hyper heat system works to -22°, and should cover most of the winter. The install was easy, with all parts needed were included. I was impressed, so i bought another system to give to my neighbor, and i am installing it tomorrow.

Jonathan W. 5/5 Verified June 22, 2026

DELLA Optima Pro CloudAir Series 18000 BTU 23.5 SEER2 Ultra Hyper Heat Mini Split AC - Up to 1000 Sq.Ft.