What kind of refrigerant does this unit use?

This unit uses R32 refrigerant. This unit comes pre-charged with R32 refrigerant for up to 24.5 feet of lineset. If your installation does not exceed this length, no additional refrigerant is needed.

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.

How long will it take for my order to ship and how much do you charge for shipping?

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.

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

SKU: 12K1VR-22S-M-I+O

$799.96

Unit price: per

Cooling Capacity: 12000
Heating Capacity: 12300
SEER2: 22
Fitting Area: 550
Voltage: 115V / 208-230V
Refrigerant Type: R32
Maximum Fuse Size: 25A / 15A
Copper Line Length: 16ft
Copper Line Size: 3/8 inch and 1/4 inch
Climate Range: 5°F - 125°F

See full Tech Specs

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Voltage

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Voltage: 115V

Free & fast shipping

30-day money-back guarantee

Free lifetime coverage

Download Remote Control Manual (New Black) (PDF)

AHRI Certificate

Description

The Serena Series is an intelligent Inverter Mini Split engineered for an effortless ownership experience. It features PureClean technology to keep the indoor unit fresh and a bottom heating element on the outdoor unit to prevent ice buildup, ensuring reliability in all seasons. The geo-location feature automatically manages your climate, saving energy without a second thought. This 12000 BTU, 22 SEER2 system provides powerful comfort for up to 550 sq. ft. and is fully controllable via Alexa, Google Home, or the DELLA app. As an Energy Star certified unit, it also qualifies for potential government rebates to help you save even more.

What’s included

1. Indoor Unit
2. Outdoor Unit
3. Refrigerant Pipe
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 & returns

Warranty

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Tech specs

Download User Manual

Indoor Unit Specs

Unit Dimensions (WxDxH):32.56" x 7.87" x 11.77"

Net/Gross Weight:18.3 / 25.35

Outdoor Unit Specs

Unit Dimensions (WxDxH):27.76" x 10.98" x 20.87"

Net/Gross Weight:52.9 / 63.93

System Specs

Cooling Capacity:12000

Heating Capacity:12300

SEER2:22

Fitting Area:550

Voltage:115V / 208-230V

Refrigerant Type:R32

Maximum Fuse Size:25A / 15A

Copper Line Length:16ft

Copper Line Size:3/8 inch and 1/4 inch

Climate Range:5°F - 125°F

DELLA Wall Mounted Mini Split AC Split View

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 5°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.

Top performance, energy smart design

57% more efficient energy savings

Cleaner air, healthier living

Durable design, lasting comfort

Reliable Comfort Through the Seasons

Designed for dependable heating and cooling as outdoor temperatures change, helping keep your home comfortable through summer heat and winter weather.

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
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- SEER2 22
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- R32
- 5°F - 125°F
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- R454B
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Frequently asked questions

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Customer Reviews

Overall rating: 4.9 / 5 from 16 reviews.

Customer photo review of DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Very Good Experience! Fast Shipping and excellent value! My Aunt loves this unit that was put into an older house with no windows that can accept AC units. Looking forward to doing more Della systems for myself and family and friends!

Stephen R. 5/5 Verified September 1, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Great

Anthony N. 4/5 Verified August 31, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

The install was easy since the instructions were detailed. I have two units and they are both running great so far.

Adam B. 5/5 Verified August 27, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Delivery was fast. Install was easy. Unit is very quiet.

Greg D. 5/5 Verified June 6, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Love the ac, works perfect for my application. Had a professional do the install, and it works perfectly

Gabriel M. 5/5 Verified September 12, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

This is the 3rd Della mini split I have installed myself. Fairly easy to install if you have the tools and patience. The performance is great. They are cost-efficient to run and easy to use.

Thomas E. 5/5 Verified June 25, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

This is the first mini split system I have purchased for rental properties. It was delivered in 2 days, complete with everything needed for a simple installation. Excellent information provided, works perfectly, and is very, very quiet. Great price too! Highly recommend!

Edward J. 5/5 Verified June 25, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Ordered 2 to Cool an Heat 1100 sq ft room, does a great job of cooling, installed myself but had HVAC Rep to run lines. These are Very Quiet. would buy again.

Ghaas 5/5 Verified June 25, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

We have a 400 square foot garage that this went into, and it works amazingly! Easy to install, great directions, and a pretty cool remote/thermostat. Just make sure you buy an outside disconnect for it!

Eugene 5/5 Verified June 25, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Excelente servicio, entrega impecable y excelente producto.

Maribel 5/5 Verified June 25, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

It's a good unit and energy savings!!!!

Mario B. 5/5 Verified June 18, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

everything went well with hook up. installation great. The only problem im having is getting my phone to work with the app. i called and was told i have to contact my cable provider to have then drop to 2.4ghz thats a problem my cable provider is not the easiest to deal with. then i have to call them back to re-set the 2.4mgz back to what it was. guess i have to live with no phone app. this is what i was told with della support.

John C. 5/5 Verified June 16, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Love it. Keeps our room so lovely and cool and makes no noise

April G. 5/5 Verified May 26, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

It's 6 months post install (Installed August 25). Serena 12000 BTU 230v. Purchased on Amazon. Delivery in about 5 days. Both units delivered together. Both in good shape. Purchased a vacuum pump from Amazon VIVOHOME 110V 1/4 HP 3.5 CFM Single Stage Rotary Vane HVAC Vacuum Pump, deburring tool, flaring tool, power whip, pad system, R410a adapter, RT201B Nylog Gasket/Thread Sealant, tork wrench and coolant line cover all from Amazon. Total cost ~ $1,200. Used existing 230v breaker box. Install took 2 days. I took it slow reading everything twice and checking everything twice. Youtube videos very very very helpful. No significant problems with install. (There were problems but not significant.) Pleased with the finished look. Even more pleased with the function. August in Texas can be hot. The unit was able to keep one end of the house very comfortable. (I have a Mitsubishi 9000 BTU mini split (1 year old) in the master bedroom to keep it cool. Professional install.) In the winter got to freezing about 10 days and it kept it's side of the house very comfortable. Happy with the function. Mitsubishi vs Della. Both do their intended job without hiccups so far. Mitsubishi 9000 BTU with 120 volt line professional install ~ $6,500. Della Serena 12000 BTU without power line homeowner (me) install ~$ 1,200. Mitsubishi cons NOT wifi or internet connected and this sucks. (This costs extra (alot) and has such bad reviews I didn't get it.) Remote sucks. No display screen just indicator lights. This sucks. Della wifi internet connected. Yea. Great remote, can control via phone app (App is not the best but it works.). Della has many more modes & ways to function built in. Functional display screen. So far Della wins. And if it's working in 4 more years it will win hands down. Two to 3 years it's a toss up.

James B. 5/5 February 24, 2026

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Just installed in 450 ft garage. weather is mild but has worked well in the first few days.

Charles C. 5/5 Verified December 28, 2025

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.

Haven’t installed it yet. Might be a week or two until it’s installed.

Roger W. 5/5 Verified September 23, 2025

DELLA Serena Series 12000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 550 Sq.Ft.