Frigidaire FFRA051WAE 5,000 BTU Window AC Review: Quiet, Simple
A 5,000 BTU window air conditioner for rooms up to 150 sq. ft. with a listed 52 dBA noise level, Auto Restart and adjustable side panels. A straightforward pick for small bedrooms and offices.
By Daniel Brooks
Updated October 8, 2026
The Frigidaire FFRA051WAE 5,000 BTU Window AC is a compact, quiet-focused unit for small bedrooms and offices, rated by Frigidaire for spaces up to 150 square feet. It is one of the most familiar conventional window air conditioners in the small-room size, with 4.3 stars from 17,670 ratings.
It keeps things simple: two fan speeds, a temperature control that holds your setting, Auto Restart and a washable filter. The decision for most buyers is whether a listed 52 dBA and an easy setup outweigh the lack of a remote and timer. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This Frigidaire is a solid small-room choice when quiet operation and easy setup matter most. Its strongest points are the listed 52 dBA noise level, Effortless Temperature Control that maintains your preset temperature, Auto Restart after power cuts, and an extra-long three-prong cord that the manufacturer says removes the need for an extension cord.
The main trade-off is control. The listing mentions no remote, no timer, no sleep or eco mode, and no inverter compressor. Coverage tops out at 150 square feet. If you want a quiet, uncomplicated unit for a small bedroom or office and do not mind adjusting it at the unit, it is worth considering.
Frigidaire 5,000 BTU Window Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | Frigidaire |
| Model | FFRA051WAE |
| Type | Window air conditioner |
| Cooling Capacity | 5,000 BTU |
| Room Size (listed) | Up to 150 sq. ft. |
| Efficiency | 11 (listed as SEER) |
| Noise Level | 52 dBA |
| Voltage / Power | 115V, 450W |
| Power Cord | 78 inches, three-prong |
| Window Fit | 23″ to 35.99″ wide, 13″ minimum height |
| Weight | 35.3 pounds |
| Modes | Cooling, air circulation |
| Fan Speeds | 2 |
| Compressor | Rotary, no inverter |
| Refrigerant | R-32 |
| Warranty | 1 year manufacturer |
Cooling Capacity and Room Size
Frigidaire rates this unit at 5,000 BTU for areas up to 150 square feet and points to small bedrooms as the ideal use. It also suits a compact home office, a nursery or a guest room.
Like any 5,000 BTU unit, it has little spare capacity. A room right at 150 square feet with strong afternoon sun, a top-floor location or heat-producing electronics will push it hard. If that describes your space, a larger unit will hold temperature more comfortably. For a shaded small bedroom, it is well matched.
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 5,000 BTU, it lines up with rooms of about 100 to 150 square feet, which matches Frigidaire’s own coverage figure.
Installation and Fit
The listed window opening is 23 to 35.99 inches wide with a minimum height of 13 inches. Adjustable side panels extend to fill the gap on either side, which the manufacturer says gives a secure fit and better airflow.
The 78-inch three-prong cord is a practical detail, since an outlet that is not right beside the window is common. At 35.3 pounds, one person can lift it, though a second person makes it easier to hold the unit in place while the sash comes down. Follow the manual and fasten it with the supplied hardware so it cannot shift or tip.
Noise, Energy Use and Efficiency
Frigidaire lists a noise level of 52 dBA and describes the unit as ideal for bedrooms. That is a manufacturer figure, and the sound in your room will depend on fan speed and how well the side panels seal the window.
The listing gives an efficiency figure of 11, labeled as SEER, with a power draw of 450 watts. Room air conditioners are usually compared by CEER, so check the EnergyGuide label for a direct comparison. The rotary compressor has no inverter, which means it cycles on and off at full output rather than slowing down. There is no eco or sleep mode listed.
For bedroom use, the practical approach is to run the lower fan speed at night and set the temperature a little higher than you would during the day. Because the compressor cycles on and off, you will hear it start and stop, which is normal for a unit without an inverter.
Controls and Smart Features
Controls are on the unit itself. You set the temperature and choose between two fan speeds, and Effortless Temperature Control works to hold the preset temperature for steady comfort. The listing does not mention a remote control, a timer, Wi-Fi or voice control.
Auto Restart restores the previous settings once power returns after an outage, so the unit picks up where it left off without you resetting it.
The lack of a remote is the feature most buyers will notice. In a small bedroom the unit is usually within a few steps of the bed, so it matters less than in a larger room, but anyone who wants to adjust the temperature without getting up, or set the unit to switch off after they fall asleep, will find these controls limiting.
Maintenance and Drainage
The washable filter is designed to capture dust from the air and is easy to remove and rinse. Cleaning it every few weeks during heavy use keeps airflow and efficiency where they should be, and there are no replacement filters to buy.
The listing does not explain how condensate is handled or whether there is a drain port. Check the manual for drainage guidance and for how to clean and store the unit at the end of the season.
Pros and Cons
| Pros | Cons |
|---|---|
| Listed 52 dBA for quiet bedroom use | No remote control or timer |
| Auto Restart after power outages | No inverter compressor |
| Long 78-inch three-prong cord | No eco or sleep mode |
| Adjustable side panels for a secure fit | Only sized for rooms up to 150 sq. ft. |
| Washable filter, 4.3 stars from 17,670 ratings |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Light sleepers in a small bedroom | Rooms larger than 150 sq. ft. |
| Buyers whose outlet is a few feet from the window | Anyone who wants a remote or timer |
| Renters who want a simple setup | Smart home users wanting app control |
| Homes with occasional power cuts | Buyers set on an inverter compressor |
| People who prefer basic on-unit controls | Casement or sliding window owners |
Final Verdict
The Frigidaire 5,000 BTU window air conditioner is a quiet, simple unit that covers the essentials for a small room. A listed 52 dBA, Effortless Temperature Control, Auto Restart, a washable filter and a long three-prong cord make it easy to live with. The compromise is the lack of a remote, a timer and energy-saving modes, along with a compressor that has no inverter. If your room is up to 150 square feet and quiet operation matters, you can check the current price and details for the Frigidaire 5,000 BTU Window Air Conditioner.
Frequently Asked Questions
What size room is the Frigidaire FFRA051WAE for?
Frigidaire lists it for areas up to 150 square feet, with small bedrooms as the main target. On the ENERGY STAR chart, 5,000 BTU fits rooms of about 100 to 150 square feet.
How quiet is it?
The listing gives a noise level of 52 dBA. Real-world sound depends on the fan speed and how well the side panels seal the window opening.
Does it come with a remote?
The listing does not mention a remote control or a timer. Temperature and the two fan speeds are set on the unit itself.
What window size does it fit?
The listed window opening is 23 to 35.99 inches wide with a minimum height of 13 inches. Adjustable side panels fill the space on each side.
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.