The Serena Series 18000 BTU dual-zone mini split is designed to provide efficient cooling and heating for two separate rooms with one outdoor unit and a 9K + 9K indoor unit configuration. Ideal for spaces up to 800 sq. ft., this 2 zone mini split heat pump allows independent temperature control in each area, making it a reliable choice for bedrooms, living rooms, home offices, small shops, and other everyday spaces. With a high 22 SEER2 rating and inverter technology, it helps reduce energy consumption while maintaining steady indoor comfort throughout the year, including low-ambient heating performance down to -13℉. Smart features such as WiFi app control, Alexa and Google Home compatibility, smart geolocation, 4D airflow, Turbo Mode, Sleep Mode, Eco Energy Saving Mode, dry mode, multiple fan speeds, and the “I Feel” function make this dual zone mini split system a practical and convenient solution for personalized climate control.
DELLA Serena Series 18000 BTU Dual Zone Mini Split AC (9K + 9K) - Up to 800 Sq.Ft.
- Unit price
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- Voltage: 230 Volts
- Refrigerant: R-32
- Seasonal Energy Efficiency Ratio (SEER): 22
- Climate Range: -13°F - 125°F
Choose Your Configuration
Free & fast shipping
30-day money-back guarantee
Free lifetime coverage
1. Indoor Unit
2. Outdoor Unit
3. Refrigerant Pipe (10ft / 16ft / 25ft / 33ft/ 50ft models only)
4. Drain Lines
5. Remote Control
6. 2 AAA Batteries
7. Mounting Plate
8. Plasticine Putty
9. Wall cap
10. Plastic Wrap
11. Communication Cable
12. Bracket Template
Shipping Policy
How Long Will It Take for My Order to Ship?
It normally takes us 1 business day to arrange the shipment. During peak seasons, it will take 2-4 business days to arrange the shipment. We provide free ground shipping, so there are no additional charges for shipping and handling.
How Do I Track My Order?
Log into YOUR ACCOUNT, and you may see each individual order that you’ve placed with us. Select one that you want and you’ll be provided with all the details you need about the order.
Once your order is on the way you will receive a notification email.
What Should I Do If I Haven’t Received My Order?
Please contact us immediately.
For the full shipping policy, click here to view our shipping policy.
Return
We offer return guarantees to ensure your satisfaction with every DELLA purchase.
DELLA provides comprehensive assistance for all orders within 30 days of purchase. If you're not satisfied with your product within 30 days of purchase from dellahome.com, you can return the product for a full refund.Products must be returned in their original operating condition, including all accessories and packaging.The customer is responsible for return shipping costs.
If a product defect is confirmed, DELLA will, at its discretion, provide the necessary replacement parts free of charge. DELLA will also cover all shipping expenses for the delivery of replacement parts.
Need to Start a Return?
To initiate a return, call us at (800) 863-4143 or contact our live chat team.
For full return terms, click here to view our return policy.
Standard Warranty (1 Year): Products are covered by a 1-year limited warranty from the date of purchase.
Extended Warranty Program: Customers who register their mini split unit within 100 days of purchase will receive complimentary lifetime parts coverage.
Registered Product and Non-professional Install: If a product defect is confirmed, DELLA will, at its discretion, provide the necessary replacement parts free of charge. The customer is responsible for all shipping costs.
Registered Product and Professional Install: If a product defect is confirmed, DELLA will, at its discretion, provide the necessary replacement parts free of charge. If, after parts are replaced, the customer’s unit is still malfunctioning and the customer has a licensed HVAC tech's defective report, Della will take care of the customer at its discretion. In any event, the customer is responsible for all shipping costs.
Unregistered Product: If a product defect is confirmed, DELLA will, at its discretion, provide the necessary replacement parts. The customer is responsible for the costs of all parts and shipping.
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Tech specs
Indoor Unit Specs
Unit Dimensions (WxDxH):30.24" x 7.87" x 11.77"
Net/Gross Weight:16.53 / 22.05
Outdoor Unit Specs
Unit Dimensions (WxDxH):34.65"x13.90"x21.93"
Net/Gross Weight:75 / 80.5
System Specs
Voltage:230 Volts
Refrigerant:R-32
Seasonal Energy Efficiency Ratio (SEER):22
Climate Range:-13°F - 125°F
No.1 Selling Mini Split Brand on Amazon
Serena Series: Peak Efficiency. Pure Serenity.
Why choose between performance and savings when you can have both? The Serena Series sets a new standard with an extraordinary SEER2 22 rating, ensuring your home stays perfectly comfortable while your energy bills stay remarkably low.
Engineered with eco-friendly R32 refrigerant and reliable heating down to -13°F, Serena is the premium choice for the energy-conscious homeowner. It’s whisper-quiet, incredibly efficient, and designed to pay for itself in savings.
Powered by MightAir X
Top performance, energy smart design
57% 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
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.
Control your AC hands-free with Alexa.
Get help anytime with live chat or call, directly in the app.
Your comfort adjusts automatically as you come and go.
Take control your way through the app, remote, or voice. Award-winning remote design makes every interaction seamless.
Frequently asked questions
DELLA supports the 2.4 GHz WiFi channel frequency band only.
The size of the mini split depends on the room's dimensions and specific needs. For example:
• A 300-square-foot room typically requires a 7000 BTU mini split.
• A 400-square-foot room needs 9000 BTU.
• A 550-square-foot room needs 1200 BTU.
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.
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.
Seasonally clean the reusable filters, inspect the condenser and evaporator units, and keep the area around the outdoor unit clear.

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
Customer Reviews
Shop accessories
DELLA Wall Mounting Bracket for 6000-36000 BTU Single Zone Mini Split
- Material: Heavy-duty galvanized steel construction
- Compatibility: 6000 to 36000 BTU ductless mini-splits
- Weight Capacity: Supports up to 485 lbs
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Rebate available
$59.96
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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
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Rebate available
Starting at $48.96
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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
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Rebate available
Starting at $44.96
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DELLA 30A & 60A Pull-Out Switch AC Disconnect Boxes
- Amperage Capacity: 30A/60A
- Voltage: 120V240V
- Protection Rating: IP66
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Rebate available
Starting at $37.50
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DELLA Mini Split Line Set
- Material: Copper
- Color: White
- Nominal Wall Thickness: 0.375 inches
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Rebate available
Starting at $89.96
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DELLA Wall Mounting Bracket for 6000-12000 BTU Single Zone Mini Split
- Material: Heavy-duty galvanized steel construction
- Dimensions: 17.72 L x 15.35 H
- Compatibility: 6000 to 12000 BTU ductless mini-splits
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Rebate available
$39.96
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DELLA Central AC Smart Wired Remote Thermostat
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Rebate available
$129.00
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DELLA Ground Stand Bracket for 24000-55000 BTU Mini Split
- Material: Heavy-duty steel
- Compatibility: 24000 to 55000 BTU mini split units
- Weight Capacity: Supports up to 440lbs
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Rebate available
$99.96
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