Della 14,000 BTU Window AC Review: Smart 115V Large-Room Cooling
A 14,000 BTU window air conditioner on standard 115V power for rooms up to 700 sq. ft. with Della+ app, Alexa support, a remote, 24-hour timer and a listed CEER of 10.7.
By Daniel Brooks
Updated October 8, 2026
The Della 14,000 BTU Window AC is a large-room unit that runs on standard 115V power and adds app and Alexa control. Della rates it for rooms up to 700 square feet, such as living rooms and family rooms. Among conventional window air conditioners at this size, it stands out for combining smart control with a UL listing and a stated CEER.
It suits a big living room, open kitchen and dining area, or a large bedroom suite. The main questions are your window size and whether you can handle a 69.4 pound install. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This Della is a capable smart option for large rooms. Its strongest points are 14,000 BTU of cooling on 115V power, the Della+ app, Alexa support, a remote, an LED control panel, four modes (Auto, Cool, Fan, Dry), 3 fan speeds, a sleep mode, a 24-hour timer and a listed CEER of 10.7.
The trade-offs are weight and window fit. At 69.4 pounds, it is a two-person job, and it needs a window at least 26 inches wide and 16 inches high. The compressor has no inverter. It holds 4.0 stars from 465 ratings. If you want smart, high-capacity cooling without a higher-voltage circuit, it is worth considering.
Della 14,000 BTU Window Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Della |
| Type | Smart window air conditioner |
| Cooling Capacity | 14,000 BTU |
| Room Size (listed) | Up to 700 sq. ft. |
| Efficiency | CEER 10.7 |
| Noise Level | As low as 54 dB |
| Voltage | 115V, 60Hz, UL Listed |
| Window Fit | 26″ to 36″ wide, 16″ minimum height |
| Dimensions | 21.5″D x 19.76″W x 15.16″H |
| Weight | 69.4 pounds |
| Modes | Auto, Cool, Fan, Dry, plus Sleep |
| Fan Speeds | 3 |
| Temperature Range | 61°F to 88°F |
| Smart Controls | Della+ app, Alexa, remote, LED panel |
| Timer | 24-hour |
| Compressor | Rotary, no inverter |
Cooling Capacity and Room Size
Della rates the unit at 14,000 BTU for rooms up to 700 square feet and names living rooms and family rooms as typical uses. That makes it a good match for the main living space in many homes and larger apartments.
Running 14,000 BTU on a standard 115V outlet is the main convenience here. Many units at this capacity and above need a higher-voltage circuit, which can mean hiring an electrician. As always, a room near 700 square feet with high ceilings or lots of sun will push the unit harder.
It is also worth checking that you need this much capacity. In a room well under 550 square feet, a 14,000 BTU unit can cool so quickly that it shuts off before removing much humidity, leaving the space cool but damp. Dry mode can help, but matching the size to the room is the better fix.
ENERGY STAR publishes this general guide for sizing a room air conditioner by floor area:
| Room Size (sq ft) | Cooling Capacity (BTU/hr) |
|---|---|
| 100 to 150 | 5,000 |
| 150 to 250 | 6,000 |
| 250 to 300 | 7,000 |
| 300 to 350 | 8,000 |
| 350 to 400 | 9,000 |
| 400 to 450 | 10,000 |
| 450 to 550 | 12,000 |
| 550 to 700 | 14,000 |
| 700 to 1,000 | 18,000 |
Adjust for your room: reduce capacity by 10 percent for a heavily shaded room, increase it by 10 percent for a very sunny room, add 600 BTU for each regular occupant beyond two, and add 4,000 BTU if the unit cools a kitchen. Source: ENERGY STAR.
At its listed 14,000 BTU, it lines up with rooms of about 550 to 700 square feet, which matches Della’s coverage claim.
Installation and Fit
Della lists a window fit from 26 to 36 inches wide with a minimum height of 16 inches. Complete installation accessories are included, and Della says no major changes to the window frame are needed.
The cabinet measures 21.5 inches deep, 19.76 inches wide and 15.16 inches tall, and weighs 69.4 pounds. Plan on two people: one to hold the unit and one to lower the sash and fasten the hardware. Follow the manual and use all supplied parts so the unit is fully supported. Check the manual for any dedicated circuit recommendation, since a 14,000 BTU unit draws more current than smaller models.
Noise, Energy Use and Efficiency
Della lists sound levels as low as 54 dB. That is reasonable for a large-capacity unit in a living room, though you will hear more at higher fan speeds when the room is warm.
The listed CEER of 10.7 is useful because CEER is the standard rating for room air conditioners, making it easier to compare with other units. Della also lists a figure of 14 labeled as SEER. The compressor has no inverter, so it cycles on and off. Sleep mode and the 24-hour timer help limit running time.
Controls and Smart Features
The redesigned Della+ app lets you control the unit at any time from anywhere, and it works with Alexa for voice control. The product title also highlights a GEO location feature in the app. The included remote and LED control panel cover all settings if you prefer not to use your phone.
You get four modes (Auto, Cool, Fan and Dry), 3 fan speeds, a sleep mode, a 24-hour timer and a temperature range of 61°F to 88°F. For a large room, starting the unit from your phone before you get home helps avoid walking into a hot space.
The sleep mode is worth using if the unit cools an open area next to a bedroom. It adjusts operation overnight for comfort and lower energy use, and the timer can switch the unit off in the early morning when outdoor temperatures drop.
Maintenance and Drainage
The title lists a reusable filter. Remove and rinse it regularly during the cooling season to keep airflow strong and efficiency steady, especially in a large room where the unit runs for long periods.
Dry mode helps on humid days. The listing does not describe condensate drainage, so check the manual for how water is handled and for the steps to remove and store the unit at the end of the season.
Pros and Cons
| Pros | Cons |
|---|---|
| 14,000 BTU on standard 115V power | Heavy at 69.4 pounds |
| Della+ app and Alexa support | Needs a window at least 26″ wide and 16″ high |
| Listed CEER of 10.7 | No inverter compressor |
| Remote, 24-hour timer and sleep mode | No heat mode |
| 4 modes and 3 fan speeds |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Living rooms and family rooms up to 700 sq. ft. | Small or medium bedrooms |
| Homes without a higher-voltage outlet | Anyone installing alone |
| Smart home users with Alexa | Windows narrower than 26″ or under 16″ high |
| Buyers who want app and remote control | Buyers set on an inverter compressor |
| Open-plan spaces needing high capacity | Anyone who needs heating |
Final Verdict
The Della 14,000 BTU Window Air Conditioner delivers large-room cooling on standard 115V power with Della+ app control, Alexa support, a remote, sleep mode, a 24-hour timer and a listed CEER of 10.7. It suits a living room or family room up to 700 square feet. The compromises are a 69.4 pound weight, a fairly large window requirement and no inverter. You can check the current price and details for the Della 14,000 BTU Window Air Conditioner, or compare other 14,000 BTU window air conditioners.
Frequently Asked Questions
Does the Della 14,000 BTU unit need a special outlet?
No. Della lists it as a 115V, 60Hz unit, so it uses a standard household outlet. Check the manual for any dedicated circuit recommendation.
Does it work with Alexa?
Yes. It works with Alexa and the Della+ app, and a remote is included.
What window size does it fit?
Della lists a fit from 26 to 36 inches wide with a minimum height of 16 inches.
How efficient is it?
Della lists a CEER of 10.7. The unit also has a sleep mode and a 24-hour timer to help reduce running time.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.