Durastar DRTAC121XNA1 Review: 12,000 BTU 115V Wall AC
A 115V cooling-only wall unit rated 12,000 BTU for 450 to 550 sq ft, with an EER of 10.5, an 11.04 amp draw, a matching Durastar sleeve and a 2 year warranty.
By Daniel Brooks
Updated October 22, 2026
The Durastar DRTAC121XNA1 is a 12,000 BTU cooling-only wall unit from a brand that mostly sells through HVAC distributors and to property managers, rather than through big-box appliance aisles. It plugs into a standard 115 volt outlet, cools a 450 to 550 square foot room, lists an EER of 10.5, and comes with a 2 year manufacturer warranty. It has a 4.2 out of 5 average from 9 ratings in our cooling-only through-the-wall air conditioners category.
Our Verdict
The DRTAC121XNA1 is a no-frills workhorse. It covers a medium living room or large bedroom on a normal outlet, draws 11.04 amps, and has the practical features landlords and owners want: a digital control panel, a remote, sleep mode, an energy saver feature, a 24 hour timer and a 62 to 86 degree F temperature range. The 2 year warranty is double the 1 year most brands offer at this size.
The big drawback is noise. Durastar lists 68.7 dB, far higher than most rivals in this guide, so it is better suited to living spaces, offices and rental units than to bedrooms. It also has no Wi-Fi or heat, and its matching sleeve is sold separately.
Durastar 12,000 BTU Through the Wall Air
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Durastar |
| Model | DRTAC121XNA1 |
| Type | Cooling-only through-the-wall air conditioner |
| Cooling Capacity | 12,000 BTU |
| Room Size | 450 to 550 sq ft |
| Power | 115 V/60 Hz, 11.04 amps, 1269.6 watts |
| Efficiency | EER 10.5 |
| Noise Level | 68.7 dB (listed) |
| Temperature Range | 62 to 86 degrees F |
| Dimensions | 24.25 x 14.5 x 20.25 inches (W x H x D) |
| Weight | 75 pounds |
| Sleeve | Durastar DRWTCSLV, sold separately |
| Warranty | 2 year manufacturer |
Cooling Capacity and Room Size
Durastar lists a coverage area of 450 to 550 square feet, which matches the 12,000 BTU band in the ENERGY STAR chart below. It suits a medium living room, a large primary bedroom, a studio apartment, a small office or a rental unit’s main room. Giving a range rather than a single “up to” figure is a sensible way to size, because it reminds you that sun, ceiling height and occupancy change what a unit can handle.
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.
Efficiency and Power
The listed EER of 10.5 is good for a conventional 12,000 BTU wall unit and means it delivers its cooling without wasting much power. Durastar lists an amperage of 11.04 and a wattage of 1269.6 on a 115 V/60 Hz supply. That is within what a standard household circuit can carry, but it is a substantial load, so avoid sharing the circuit with a microwave or space heater.
The energy saver feature and 24 hour timer help keep running costs down, and sleep mode eases off overnight.
Noise
Durastar lists 68.7 dB, which is the main reason this unit is not higher on our lists. Many rivals at 12,000 BTU list considerably lower figures. In a living room with a TV or conversation going, it may be acceptable. In a bedroom, especially for light sleepers, it is likely to be noticeable. If quiet operation matters, look at the Keystone or OLMO 12,000 BTU units instead.
Installation and Sleeve
The chassis measures 24.25 inches wide, 14.5 inches tall and 20.25 inches deep and weighs 75 pounds. Durastar says it is compatible with its own DRWTCSLV wall sleeve, which is sold separately. If you are replacing an existing Durastar unit, the same sleeve should work. If you have a sleeve from another brand, compare its inside dimensions with the chassis before ordering.
The box contains the unit and its remote. Plan for two people to lift it into the sleeve, and seal any gap between the chassis and the sleeve with foam strips so outdoor air and insects stay out.
Controls
Controls are simple and dependable: a control panel with a digital display, a remote, sleep mode, an energy saver feature and a 24 hour timer. The temperature range runs from 62 to 86 degrees F. There is no app, Wi-Fi or voice control, which some landlords prefer, since tenants cannot change settings remotely and there is no network setup to manage.
Why the 2 Year Warranty Matters
Most wall units at this size carry a 1 year warranty. Durastar’s 2 year manufacturer warranty gives an extra season of cover, which is valuable for a unit that sits in a wall and is awkward to remove for service. Keep the receipt and model number, and register the unit if Durastar offers registration.
Durastar’s Wall Unit Range
Durastar sells a full line of cooling-only wall units that share this chassis and controls, from 8,000 and 10,000 BTU models on 115 volts to 10,000, 12,000 and 14,000 BTU models on 208/230 volts, plus heat and cool versions. That makes the brand popular with property managers, who can stock one sleeve type and swap capacities between apartments as needed. If you manage several units, standardizing on one line also simplifies spare filters and remotes.
For a single home, the DRTAC121XNA1 is the right Durastar if your sleeve has a standard outlet and the room is in the 450 to 550 square foot range. If the outlet beside your sleeve is a high-voltage type, choose one of Durastar’s 208/230 volt models instead.
Who It Suits Best
The DRTAC121XNA1 suits living rooms, offices and rental units of 450 to 550 square feet with a standard outlet, especially where a longer warranty and solid efficiency matter more than low noise. It is less suited to bedrooms, smart home users, or rooms that need winter heat.
Pros and Cons
| Pros | Cons |
|---|---|
| 12,000 BTU on a standard 115V outlet | 68.7 dB listed sound level |
| EER 10.5 | Sleeve sold separately |
| 2 year manufacturer warranty | No Wi-Fi or app |
| Sleep mode, energy saver and timer | Few ratings so far |
| Clear 450 to 550 sq ft sizing | No heat mode |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Living rooms and offices | Bedrooms and light sleepers |
| Landlords and rental units | Smart home users |
| Durastar sleeve replacements | Rooms that need heat |
| Buyers who want a longer warranty | Noise-sensitive spaces |
For more options, see our picks for the best 12,000 BTU through-the-wall air conditioners and the best 115V through-the-wall air conditioners.
Final Verdict
The Durastar DRTAC121XNA1 is an efficient, well-warrantied 12,000 BTU wall unit for living spaces and rentals on a normal outlet. Its high listed sound level keeps it out of the bedroom, but for a busy living room or office it is a sound, practical choice. You can check the current price and details for the Durastar 12,000 BTU Through the Wall Air Conditioner.
Frequently Asked Questions
What size room does the Durastar DRTAC121XNA1 cool?
Durastar lists a coverage area of 450 to 550 square feet.
Does it run on a standard outlet?
Yes. It runs on 115 V/60 Hz and draws 11.04 amps.
Which sleeve does it use?
It is compatible with the Durastar DRWTCSLV wall sleeve, sold separately.
How loud is it?
Durastar lists 68.7 dB.
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.