Keystone KSTAT10-1E Review: 10,000 BTU 115V Wall AC
A 115V cooling-only wall unit rated 10,000 BTU for rooms up to 450 sq ft, with a 50.2 dB listed sound level, 2.3 pints per hour of moisture removal and a follow me remote.
By Daniel Brooks
Updated October 19, 2026
The Keystone KSTAT10-1E is a 10,000 BTU cooling-only wall air conditioner for rooms up to 450 square feet that runs on a standard 115 volt outlet. Its two standout features are a low 50.2 dB listed sound level and a remote with a built-in thermostat that reports the temperature where you sit. It has a perfect 5.0 out of 5 average from 10 ratings so far, a small but encouraging start in our cooling-only through-the-wall air conditioners category.
Our Verdict
The KSTAT10-1E is a strong bedroom and small living room unit. It is quieter on paper than most conventional 10,000 BTU wall units, removes up to 2.3 pints of moisture per hour, and adds energy saver mode, sleep mode, a 24 hour timer and a check filter alert. The follow me remote fixes the common problem of a wall unit sensing temperature next to a warm outside wall rather than in the room.
It has no Wi-Fi, no inverter and no heat, and the listing does not mention a sleeve, so plan for one. With only 10 ratings, its long-term track record is still building. For a quiet, simple wall unit on a normal outlet, it is well worth a look.
Keystone 10,000 BTU Wall Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Keystone |
| Model | KSTAT10-1E |
| Type | Cooling-only through-the-wall air conditioner |
| Cooling Capacity | 10,000 BTU |
| Room Size | Up to 450 sq ft |
| Power | 115 volts, 1040 watts |
| Refrigerant | R-32 |
| Noise Level | 50.2 dB (listed) |
| Dehumidifying | Up to 2.3 pints per hour |
| Controls | Remote with built-in thermostat, 3 modes, 3 fan speeds |
| Dimensions | 24.21 x 14.53 x 20.28 inches (W x H x D) |
| Weight | 67.2 pounds |
| In the Box | Air conditioner, remote, batteries, manual |
| Warranty | 1 year limited |
Cooling Capacity and Room Size
Keystone rates the KSTAT10-1E for small to medium spaces up to 450 square feet, which sits at the top of the 10,000 BTU band in the ENERGY STAR chart below. It suits a primary bedroom, a nursery, a home office, a dorm room or a small living room. Keystone also mentions bathrooms and sheds, where a wall unit can be a tidy permanent option.
Three cooling modes, three fan speeds and 4-way adjustable louvers let you tune the airflow to the room.
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.
Follow Me Remote
Keystone’s remote takes the temperature where you are, displays it on its LCD screen and sends it to the unit every 3 minutes. The air conditioner then cools to that reading instead of the temperature at its own sensor. In a bedroom, keep the remote on the nightstand, and the unit will cool to the temperature at the bed rather than the wall.
Noise
Keystone lists 50.2 dB, which is low for a conventional 10,000 BTU wall unit. That makes the KSTAT10-1E one of the better non-inverter choices for light sleepers. Use sleep mode and the lowest fan speed at night for the quietest operation.
Energy Use
The unit draws 1040 watts on a standard 115 volt outlet. Energy saver mode cycles the fan off with the compressor once the room reaches your set temperature, and sleep mode automatically adjusts operation overnight to use less energy. The programmable 24 hour timer lets you cool the room only when you need it. Keystone’s listing does not give a clear efficiency rating, so we have not compared it on that figure.
Dehumidifying
The built-in dehumidification system removes up to 2.3 pints of moisture per hour. That is a useful figure for a 10,000 BTU unit, and it helps in muggy bedrooms, basements and bathrooms where damp air makes the room feel warmer.
Installation
The chassis measures 24.21 inches wide, 14.53 inches tall and 20.28 inches deep, and Keystone includes a universal interior trim kit for the indoor side. The listing does not include a sleeve, so reuse a compatible one or buy one separately, and confirm the fit with Keystone’s installation guide. At 67.2 pounds, it is a manageable two-person lift.
Power is simple: the unit plugs into a standard 115 volt outlet, so there is no new receptacle to install.
Maintenance
The mesh filter slides out for rinsing, and a check filter alert tells you when it is due. In peak season, clean it every couple of weeks, more often with pets. Outside, keep the rear grille clear of leaves and debris. A clean filter and clear grille do more for cooling and noise than any setting on the remote.
Choosing the Voltage Version
Keystone sells the same 10,000 BTU wall unit in two voltages. The KSTAT10-1E reviewed here plugs into a standard 115 volt outlet, while a separate version needs a high-voltage receptacle. Check the outlet beside your sleeve before ordering, because the plugs are different and the wrong version will not connect. For most apartments and homes with an ordinary outlet near the opening, this 115 volt model is the one to buy.
How It Compares
Against other 10,000 BTU wall units on a standard outlet, the KSTAT10-1E stands out for its listed sound level and follow me remote. Rivals from LG and Whirlpool offer longer track records, and TCL adds Wi-Fi. If quiet operation and accurate room temperature are your priorities, the Keystone has the edge. If app control matters most, look at a smart model instead.
Who It Suits Best
The KSTAT10-1E suits bedrooms, nurseries, offices and small living rooms up to 450 square feet with a standard outlet, especially for light sleepers. It is less suited to smart home users, large rooms, or anyone who wants a long ownership track record before buying.
Pros and Cons
| Pros | Cons |
|---|---|
| 50.2 dB listed sound level | No Wi-Fi or app |
| Remote reads room temperature | Sleeve not mentioned in listing |
| 2.3 pints per hour dehumidifying | Only 10 ratings so far |
| Runs on a standard 115V outlet | No clear efficiency rating |
| Energy saver, sleep and timer | No heat mode |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Light sleepers | Smart home users |
| Bedrooms and nurseries | Large living rooms |
| Muggy rooms that need moisture removal | Rooms that need heat |
| Homes with standard outlets only | Buyers who want a long track record |
For more options, see our picks for the best through-the-wall air conditioners for bedrooms and the best 10,000 BTU through-the-wall air conditioners.
Final Verdict
The Keystone KSTAT10-1E is a quiet, practical cooling-only wall unit for rooms up to 450 square feet, and its follow me remote makes the thermostat far more accurate in real use. It is an easy recommendation for bedrooms with a standard outlet. You can check the current price and details for the Keystone 10,000 BTU Wall Air Conditioner and Dehumidifier.
Frequently Asked Questions
How loud is the Keystone KSTAT10-1E?
Keystone lists 50.2 dB.
What size room does it cool?
Keystone rates it for spaces up to 450 square feet.
Does it need a special outlet?
No. It runs on a standard 115 volt outlet and draws 1040 watts.
How much moisture does it remove?
Up to 2.3 pints per hour.
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.