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DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
#line set_none
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
#line set_none
#line set_none
#line set_none
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
#line set_none
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.
DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.

DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.

SKU: TP-18K2V-23S-I+O-X
$1,434.96
  • Cooling Capacity: 18000
  • Heating Capacity: 19000
  • SEER2: 23
  • Fitting Area: 1000
  • Voltage: 208-230V
  • Refrigerant Type: R454B
  • Maximum Fuse Size: 20A
  • Copper Line Length: None / 10ft / 16ft / 25ft / 33ft / 50ft
  • Climate Range: -13°F - 131°F
See full Tech Specs

Customize your setup

What size should I get?

  • The correct line set size depends on your mini split system. Always refer to the manufacturer’s specifications to ensure compatibility.
  • Measure the distance between your indoor and outdoor units
  • When in doubt, choose a longer line set. Most systems require a minimum length of 15 feet to function correctly, while exceeding the manufacturer’s maximum limit can cause performance issues.

For more information, check out our complete guide to line sets for mini splits

What voltage do I need?

  • The voltage you need depends on your home’s electrical supply and the requirements of your mini split system.
  • Before installation, make sure your home’s available voltage matches the voltage listed for the unit.
  • Most mini split systems require either 115V or 208–230V power.
    Using the wrong voltage can cause performance issues or damage the unit.
  • If you are unsure, consult a licensed electrician before installation.

Free & fast shipping

30-day money-back guarantee

Free lifetime coverage

Download User Manual (PDF)
Download Remote Control Manual (PDF)
AHRI Certificate
Power your largest living spaces with the intelligent and robust Optima Series. This 1.5 ton mini split delivers an incredible 18000 BTUs of power for areas up to 1000 sq. ft. while maintaining a class-leading 23 SEER2 efficiency. Its advanced heat pump provides reliable warmth in extreme temperatures down to -13°F, and with full control via Amazon Alexa or the Della+ app, it offers unparalleled year-round comfort. This system utilizes modern, eco-friendly R454b refrigerant and is backed by a lifetime warranty.
#line set_50ft

1. Indoor Unit
2. Outdoor Unit
3. Refrigerant Pipe (10ft / 16ft / 25ft / 33ft/ 50ft models only)
4. Drain Lines
5. Remote Control
6. Rubber Feet
7. Insulation Foam
8. Mounting Plate
9. 2 AAA Batteries
10. Drain Elbow
11. Wall Sleeve
12. Plasticine Putty
13. Screws
14. Anchors
15. Wall cap
16. Plastic Wrap
17. Communication Cable
18. Bracket Template

Tech specs

Download User Manual

Indoor Unit Specs

Unit Dimensions (WxDxH):43.19" x 8.75" x 13.06"

Net/Gross Weight:30.9 / 35.2

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:19000

SEER2:23

Fitting Area:1000

Voltage:208-230V

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

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 23-24 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.

Powered by MightAir X

Top performance, energy smart design

65% more efficient energy savings

Cleaner air, healthier living

Durable design, lasting comfort

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?

  • Efficiency
  • HSPF2 Rating (Region IV)
  • Refrigerant
  • Climate Range
  • Energy Rebate

    • DELLA Optima Series 18000 BTU 23 SEER2 Ultra Heat Mini Split AC - Up to 1000 Sq.Ft.

    • SEER2 23
    • 10
    • R454B
    • -13°F - 131°F

    • DELLA Optima Pro 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
    • Shop Now

    • 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
    • Shop Now

    • DELLA Econo Series 17000 BTU 17 SEER2 Mini Split Heat Pump AC-Up to 1000 Sq.Ft.

    • SEER2 17
    • 8.5
    • R32
    • 5°F - 122°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

Frequently asked questions

View our Help Center

Talk to an HVAC expert

Not sure which system is right for your home? Our experts can help with sizing, installation, and product selection.
Technical support: Mon - Fri, 8 AM - 3 PM (PST)
24/7 live chat for general question

Get support

Customer Reviews

Shop accessories

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DELLA Mini Split Line Set
#size_10ft line set 1/2" and 1/4"

DELLA Mini Split Line Set

  • Material: Copper
  • Color: White
  • Nominal Wall Thickness: 0.375 inches

Starting at $89.96

#size_3" 7.5 ft line set cover
#Size_3" 7.5 Ft Line Set Cover

DELLA Mini Split Line Set Cover

  • Material: PVC
  • Temperature Tolerance: -40°F to 140°F
  • Applicable Sizes: 7000 to 24000 BTU / 7000 to 36000 BTU

Starting at $44.96

#size_3" 9 ft line set cover with flexible duct
#Size_3" 9 Ft Line Set Cover with Flexible Duct

DELLA Mini Split Line Set Cover with Flexible Duct

  • Material: PVC
  • Temperature Tolerance: -40°F to 140°F
  • Applicable Sizes: 7000 to 24000 BTU / 7000 to 36000 BTU

Starting at $48.96

DELLA Wall Mounting Bracket for 6000-12000 BTU Mini Split

DELLA Wall Mounting Bracket for 6000-12000 BTU Mini Split

  • Material: Heavy-duty galvanized steel construction
  • Dimensions: 17.72 L x 15.35 H
  • Compatibility: 6000 to 12000 BTU ductless mini-splits

$39.96

DELLA Wall Mounting Bracket for 6000-36000 BTU Mini Split

DELLA Wall Mounting Bracket for 6000-36000 BTU Mini Split

  • Material: Heavy-duty galvanized steel construction
  • Compatibility: 6000 to 36000 BTU ductless mini-splits
  • Weight Capacity: Supports up to 485 lbs

$59.96

DELLA Ground Stand Bracket for 9000-18000 BTU Mini Split

DELLA Ground Stand Bracket for 9000-18000 BTU Mini Split

  • Material: Heavy-duty steel
  • Compatibility: 9000 to 18000 BTU mini split units
  • Weight Capacity: Supports up to 396 lbs

$79.96

DELLA Ground Stand Bracket for 9000-45000 BTU Mini Split

DELLA Ground Stand Bracket for 9000-45000 BTU Mini Split

  • Material: Heavy-duty steel
  • Compatibility: 9000 to 45000 BTU mini split units
  • Weight Capacity: Supports up to 440lbs

$99.96

#Amperage Capacity_30 Amps

DELLA 30A & 60A Pull-Out Switch AC Disconnect Boxes

  • Amperage Capacity: 30A/60A
  • Voltage: 120V240V
  • Protection Rating: IP66

Starting at $35.50

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