Della 6,000 BTU Smart Window AC Review: Wi-Fi, Alexa, CEER 11.0
A 6,000 BTU Wi-Fi window air conditioner for rooms up to 250 sq. ft. with Della+ app and Alexa control, a remote, 4 modes, eco and sleep modes, a 24-hour timer and a listed CEER of 11.0.
By Daniel Brooks
Updated October 8, 2026
The Della 6,000 BTU Smart Window AC brings Wi-Fi, Alexa support and a full set of modes to a compact unit for rooms up to 250 square feet. It lists a CEER of 11.0 and a noise level as low as 51 dB, and the product title highlights a GEO location feature. Among mid-size smart conventional window air conditioners, it is an affordable connected option.
It suits a bedroom, home office or small living room. The main consideration is a 14.5 inch minimum window height. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This Della is a well-featured smart unit for a medium room. Its strongest points are the Della+ app with Alexa voice control, a remote, an LED control panel, four modes (Auto, Cool, Fan and Dry), 3 fan speeds, sleep and eco modes, a 24-hour timer, a temperature range of 61°F to 88°F, a listed CEER of 11.0 and a listed 51 dB. It holds 4.0 stars from 465 ratings.
The trade-offs are minor. It needs a window at least 14.5 inches high, there is no inverter mentioned, and the listing does not describe the filter beyond calling it reusable. If you want smart, efficient cooling for a room up to 250 square feet, it is worth considering.
Della 6000 BTU Window Air Conditioner
As an Amazon Associate we earn from qualifying purchases. Product prices and availability are accurate as of the date/time indicated.
Key Specifications
| Feature | Specification |
|---|---|
| Brand | Della |
| Type | Smart window air conditioner |
| Cooling Capacity | 6,000 BTU |
| Room Size (listed) | Up to 250 sq. ft. |
| Efficiency | CEER 11.0, 428 kWh per year |
| Noise Level | As low as 51 dB |
| Voltage / Power | 115V, 60Hz, 550W, UL Listed |
| Window Fit | 23″ to 34″ wide, 14.5″ minimum height |
| Dimensions | 15.2″D x 15.98″W x 12.52″H |
| Weight | 38.6 pounds |
| Modes | Auto, Cool, Fan, Dry, plus Eco and Sleep |
| Fan Speeds | 3 |
| Temperature Range | 61°F to 88°F |
| Smart Controls | Della+ app, Alexa, remote, LED panel |
| Timer | 24-hour |
| Refrigerant | R-32 |
| Warranty | 1 year |
Cooling Capacity and Room Size
Della rates the unit at 6,000 BTU for rooms up to 250 square feet and suggests small rooms, living rooms and home offices. In practice, a medium bedroom or home office is the best match.
The 6,000 BTU size gives more headroom than a 5,000 BTU unit for a room with afternoon sun or electronics, while still being sized for comfortable nighttime use.
If your bedroom doubles as a workspace, the extra capacity over a 5,000 BTU unit helps offset heat from a computer and lighting during the day. For a room close to 250 square feet with strong sun, a larger unit may hold temperature more easily.
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 6,000 BTU, it lines up with rooms of about 150 to 250 square feet, which matches Della’s coverage claim.
Installation and Fit
Della lists a fit for windows from 23 to 34 inches wide with a minimum height of 14.5 inches. Complete installation accessories are included, and Della says no major changes to the window frame are needed.
The compact cabinet measures 15.2 inches deep, 15.98 inches wide and 12.52 inches tall, and weighs 38.6 pounds. One person can lift it, but a helper makes installation safer. Follow the manual and plug it into a standard 115V outlet.
Noise, Energy Use and Efficiency
Della lists sound levels as low as 51 dB, which is quiet for a 6,000 BTU unit and suitable for a bedroom on the lowest fan speed.
The listed CEER of 11.0 is the standard rating for room air conditioners. Annual energy use is listed at 428 kWh and the power draw at 550 watts. Eco mode, sleep mode and the 24-hour timer help limit running time.
Controls and Smart Features
The redesigned Della+ app lets you control the unit anytime, anywhere, and it works with Alexa for voice commands. The GEO location feature named in the title can help automate cooling based on when you come and go.
In the room, the included remote and LED control panel handle all settings. You get four modes (Auto, Cool, Fan and Dry), 3 fan speeds, sleep and eco modes, a 24-hour timer and a temperature range of 61°F to 88°F.
For a bedroom, a practical routine is to start cooling from the app on your way home, switch to sleep mode at night and let the timer turn the unit off before morning.
Maintenance and Drainage
The title lists a reusable filter. Rinse it regularly during the cooling season to keep airflow steady. Slide it out, rinse it in lukewarm water, let it dry fully and slide it back in.
Dry mode helps reduce humidity on muggy days. The listing does not describe condensate drainage, so check the manual for how water is handled and for seasonal storage.
Pros and Cons
| Pros | Cons |
|---|---|
| Della+ app and Alexa support | Needs a window at least 14.5″ high |
| Listed CEER of 11.0 | No inverter mentioned |
| Listed noise as low as 51 dB | Filter details limited in the listing |
| Auto, Cool, Fan and Dry modes | No heat mode |
| Remote, eco, sleep and 24-hour timer |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Bedrooms and offices up to 250 sq. ft. | Rooms larger than 250 sq. ft. |
| Smart home users with Alexa | Windows under 14.5″ of opening height |
| Buyers who want app and remote control | Buyers set on an inverter compressor |
| Light sleepers who will use sleep mode | Anyone needing heating |
| Buyers who value a listed CEER | Casement or sliding window owners |
Final Verdict
The Della 6000 BTU Smart Window Air Conditioner packs Della+ app and Alexa control, a remote, four modes, eco and sleep modes, a 24-hour timer and a listed CEER of 11.0 into a compact unit for rooms up to 250 square feet. The compromise is a 14.5 inch minimum window height and no inverter. You can check the current price and details for the Della 6000 BTU Smart Window Air Conditioner, or compare other 6,000 BTU window air conditioners.
Frequently Asked Questions
Does the Della 6000 BTU unit work with Alexa?
Yes. It works with Alexa voice control and the Della+ app, and a remote is included.
What size room is it for?
Della rates it for rooms up to 250 square feet. On the ENERGY STAR chart, 6,000 BTU fits rooms of about 150 to 250 square feet.
How efficient is it?
Della lists a CEER of 11.0 and annual energy use of 428 kWh.
What window size does it fit?
Della lists windows from 23 to 34 inches wide with a minimum height of 14.5 inches.
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.