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 18000BTU, 22 SEER2 system provides powerful comfort for up to 1000 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.
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 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 whoregister 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.
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.
Powered by MightAir X
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
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.
Take control your way through the app, remote, or voice. Award-winning remote design makes every interaction seamless.
Your comfort adjusts automatically as you come and go.
Get help anytime with live chat or call, directly in the app.
Control your AC hands-free with Alexa.
Which series is right for me?
Model
Efficiency
HSPF2 Rating (Region IV)
Refrigerant
Climate Range
Energy Rebate
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DELLA Serena Series 18000 BTU 22 SEER2 Mini-Split Heat Pump AC - Up to 1000 Sq.Ft.
SEER2 22
9.5
R32
5°F - 125°F
DELLA Vario Series 18000 BTU 21 SEER2 Mini Split Heat Pump AC - Up to 1000 Sq.Ft.
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.
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.
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.
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.
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.
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
Everything went as planned. It took me all summer because I only worked when I had time and when it wasn’t too hot. I did it all. I only had trouble with the torque wrench. It’s possible it was my fault. I do have limited electrical experience. I have hvac observation experience but this was my first start to finish experience. The location where I put the units made it more difficult but I’m very pleased.
This della 18k mini split is amazing and it actually started cooling my garage with the door open on a 100* day. It dropped from 94 to 79 in 1 hour and still dropping.
Can’t share my experience with installation, my dad who’s a contractor installed it for me. However it does great in my upstairs man cave, it used be so hot and now it’s keeps it very cool and comfortable and is very quiet compared to my window unit, can hardly hear it even in turbo, will definitely get another one for my garage!
The only downside is the remote is pretty busy, but I just use the app
So far, working is amazing. Cools my garage for detailing, and the heat works great also. Very easy to install and super quiet. Absolutely love this unit.
So have 37 yrs in the elevator business, I do a lot of things on my own, this package was such an easy install, I might try to sell one to my neighbor for his sun room, I did have an HVAC guy shorten my lines to make it look pretty and put the vacuum on it, but your directions are spot on a very easy to do ,, Thanks Della should have did this a while ago!
Had a fellow tradesman install the unit, of course he made it look easy. He had it done in a few hours. Unit seems to heat and cool my shop nicely. In the last two weeks we’ve had cold and warm temps here in Maryland so it’s been used in both modes already!
Both units were packaged very well. One box did have a tear but nothing inside was damaged. Everything that you will need is included. The line set was long enough that i was able to cut and re-flair one end. Power cable is also long as well.
AC and heat work well. I have s chance to use both heat and AC within a week.
Really great experience. Was shipped really fast. Arrived with no damage. Instructions were very clear and easy to follow. Installed with no problems. Everything is up and running as advertised. Will definitely use Della for any HVAC needs in the future.
It's a Good unit. Functions well and heats and cools wonderfully. However, It is new and they do not have all of the replacement parts available for sale as of this post. Also the Google home integration as of now can turn it on and off. That's it. Not even any temperature selection. Wish they would support it better.
Best money I have ever spent. I wanted to air condition our garage and I found this mini split system. We installed the system ourselves, had an electrician come hook it up to power, and got it up and running in no time at all. We had an HVAC technician come out a little later just to look it over to make sure everything was working proper, but it was very easy to install. It performs like you would not believe! Keeps the garage nice and cool during the insanely hot Texas summer, so it has been a game changer. With how efficient it is, our power bill has not changed at all since installing it and I keep the garage at 70° all year round.
The app also works great and is just so nice to use. Very quiet, very powerful, very efficient, super easy to install and maintain, and overall just a joy to have.
If you are considering it, this is 100% worth the money.
Was fairly easy to install after watching a few YouTube videos. Works great. It is fairly silent. It warms our 1000 sq ft garage in a few minutes. I love it and would do it again. So nice having the controlled environment. I also like that I can control it from my phone.
Great Mini-Split AC – Perfect for a Hot Texas Concession Stand
Bought this to help cool a 500 sq ft concession stand packed with 4 beverage fridges and 3 freezers — and with 100 degrees+ days here in Texas, that's no small task. Two months in, and I'm very happy with the performance. It keeps the space comfortable and handles the heat load well. Installation was straightforward. I rented a vacuum pump from the local auto parts store to pull a vacuum before charging, and everything else was simple to set up.
I can't say enough good things about this minisplit. This is not our first one. We have bought and installed several. This is so economical to operate. I highly recommend!!
I bought this unit to supplement my central AC, which was not getting the job done, and the brutal summer on the northern Gulf Coast. This Della unit is high quality, even my installers commented that it was exceptionally good without me asking. Cooling beyond expectations, and so quiet. A pleasure to operate with the remote.
I am very happy with the unit! The installer, Don Leitch, and his partner were professional and found just the right spot for a small house. The unit provides instant heat! It beats central air.
Warning, before trying to have the feedline exit on the right. Be aware that the copper lines on the inside units are metric. Plus, the larger copper tubing is much shorter than the smaller tube.
If you try and bend the lines and come out the right side, be sure to measure and see if there is enough exiting the hole to make the 90-degree bend down the outside wall.
I did not, so now I must come out the left side and patch the hole in the wall.
Works great, over 100 degrees outside and a comfortable 73 inside. 18k unit for about 900 sq.ft. Discharge air temperature between 47 and 50 degrees. Installation was pretty easy about an hour for the inside unit and 6-8 very casually for the condenser with the electrical work, cutting down and vacuuming the line set. Only been running for a week or so, but very pleased so far.