Energy Awareness Month Sale Ends Soon！
Year-Round Comfort for Every Space
Save 10% on Mini Splits, or 12% with any 2 accessories.
Mini Split Multi Zone
Control each room independently with one outdoor unit for personalized comfort and less energy waste.
Mini Split Single Zone
Efficient heating and cooling for individual rooms with simple, dedicated temperature control.
See What Higher Efficiency Could Save You
Compare four 12,000 BTU DELLA mini splits with a reference system.
 Reference System |  Serena Series |  Vario Series |  Optima Series | Optima Pro CloudAir | |
Efficiency | 14.3 SEER2 | 22 SEER2 | 23 SEER2 | 23 SEER2 | 25 SEER2 |
Est. Annual | — | 27.8–31.2% | 29.2–33.3% | 31.2–34.3% | 35.5–38.9% |
Est. Annual | 3,784–4,101 kWh | 2,603–2,856 kWh | 2,525–2,779 kWh | 2,484–2,725 kWh | 2,311–2,540 kWh |
Est. Annual | $677–$734 | $466–$511 | $452–$497 | $445–$488 | $414–$455 |
Est. 5-Year | — | $958–$1,114 | $1,005–$1,183 | $1,076–$1,232 | $1,222–$1,397 |
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Note: Estimates combine heating and cooling across Southwest, Southeast, and Northern U.S. climate profiles at 17.90¢/kWh. Actual results may vary by climate, usage, installation, and electricity rates.
Make DIY Installation Easier With a Rental Kit
- Essential tools included - no need to buy one-time equipment
- Install on your schedule - avoid peak-season delays
- Built for DIY installs - simpler, more controlled setup
Bundle Your Mini Split & Save 12%
Add any 2 accessories to your mini split and get 12% OFF — or shop a bundle below.
Complete Your Mini Split Setup
Shop installation essentials and accessories for your setup.
Save 30% on Whole-Home Comfort
Central AC
Whole-home heating and cooling with consistent airflow and balanced comfort throughout the house.
Extend Your Swim Season in Comfort
Pool Heat Pump
Keep your pool at a comfortable temperature and extend your swimming season with efficient, reliable heating.
Fast, Flexible Cooling Where You Need It Most
Window AC
Fast, reliable cooling for individual rooms with a simple space-saving installation.
Portable AC
Flexible cooling that moves where you need it most, with no permanent installation required.
Refer a Friend
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Refer a Friend
Give friends 5% off on their air conditioner orders, and earn 4%–10% commission on every purchase through your link.
What Our Customers Are Saying
George P.
I researched online and chose the Della Serena series 24000btu. The price, warranty, and reviews appealed to me. Shipping was faster than expected. The unit arrived at 8 am and I finished the install in 10 hours. Everything went smoothly, and the unit is very quiet running. I'm just using the remote to control it.
Jeff W.
I am truly impressed with these Della split units. This was the perfect choice for the space being used. I ordered everything needed to make for a great installation. Wall bracket, line sets, line set covers. The inside units are nice-looking units, and their sizing is common to all others out there.
Dustin C.
These were easy to install and cool very well. The best part is that because you stay under 50’ of coolant lines, you don’t have to higher a HVAC company to charge the lines. That’s it: plug and play; anyone with DIY skills can do it.
Jonathan W.
Because of Montana, I needed the heater option. Most systems offered heat down to 5°, but I need heat for winter too, so the ultra hyper heat system works to -22° and should cover most of the winter. The install was easy, with all parts needed included. I was impressed.
Jerry L.
This is our second Della. This one was installed in our home. It was an easy process from start to finish. I worked with Brenda during the ordering. She was very patient and understood what I wanted. I took my time with everything. As far as the installation, the YouTube videos made it pretty easy.
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