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 Mini Split?

The size of the mini split depends on the room's dimensions and specific needs. For example: • A 400-square-foot room typically requires a 9000 BTU mini split. • 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 Mini Split?

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 Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.

SKU: 048-TLP-MODU-1D4-TP-Q9999

$3,629.96

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: 22.5
Climate Range: -13°F - 131°F

See full Tech Specs

Choose Your Configuration

Air Handler (9K)

DELLA Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.

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30-day money-back guarantee

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Description

Efficient, powerful, and built for large spaces — perfect for homes or offices.
35000 BTU capacity covers up to 1600 sq. ft.
Quad Zone cooling with 9K+9K+9k+9k indoor units
Energy-efficient performance with whisper-quiet operation

What's included

Shipping & returns

Lifetime warranty

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Tech specs

Download User Manual

Indoor Unit Specs

Unit Dimensions (WxDxH):32.28" x 12.05" x 7.68"

Net/Gross Weight:20.7 / 25.1

Outdoor Unit Specs

Unit Dimensions (WxDxH):42.25"x18.44"x33.56"

Net/Gross Weight:145.5 / 169.4

System Specs

Voltage:230 Volts

Refrigerant:R454B

SEER2:22.5

Climate Range:-13°F - 131°F

DELLA mini split white wall unit internal

No.1 Selling Mini Split Brand on Amazon

Optima: Cold Weather’s Greatest Rival. Efficiency’s New Standard.

Engineered with cutting-edge Hyper Heat technology, the Optima mini-split delivers reliable, high-performance heating even when temperatures plummet to -13°F. With an industry-leading 22-24 SEER2 rating and ENERGY STAR® certification, it’s designed to slash your utility bills while keeping your sanctuary cozy year-round. Whisper-quiet, smart-connected, and built for the extreme—Optima ensures your comfort (and savings) never freeze, no matter what’s happening outside.

Top performance, energy smart design

61% 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

DELLA mini split air conditioner white Optima

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 Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.
- SEER2 22.5
- 10
- R454B
- -13°F - 131°F
- DELLA Vario Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9K+9K) - Up to 1600 Sq.Ft.
- SEER2 19
- 10
- R454B
- -13°F - 131°F
- Shop Now
- DELLA 35000 BTU Quad Zone Ceiling Cassette Mini Split AC (9K + 9K + 9K + 9K) - Up to 1600 Sq.Ft.
- SEER2 22.5
- 10
- R454B
- -13°F - 131°F
- Shop Now
- DELLA 34000 BTU Quad Zone Concealed Ducted Mini Split Heat Pump AC (9K + 9K + 9K + 9K)
- SEER2 20
- 8.5
- R454B
- -13°F - 131°F
- Shop Now

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Customer Reviews

Overall rating: 5.0 / 5 from 3 reviews.

Customer photo review of DELLA Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.

Works good

Eddy E. 5/5 Verified July 1, 2026

DELLA Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.

Awesome unit works great.

Julio 5/5 Verified September 19, 2026

DELLA Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.

Ordered this for a mobile home that had a failing ac unit and an outrageous power bill, during the summer extreme heat, when the real feel was 100+, the temp would be 90 inside, after installing this unit, the inside temp is a constant 73 and the power bill has dropped about half. Best price out there, easy to install, works great After installing this, my brother was so impressed he purchased one for his mobile home because he was suffering from high bills and it was too hot. He received the same results; very impressive.

Sam 5/5 Verified September 19, 2026

DELLA Optima Series 35000 BTU Quad Zone Mini Split AC (9K+9K+9k+9k) - Up to 1600 Sq.Ft.