BLACK+DECKER BD05MWT6 5,000 BTU Window AC Review: Compact Pick
A compact 5,000 BTU mechanical window air conditioner for bedrooms and small spaces up to 150 sq. ft. with two cooling levels, R32 refrigerant, accordion side panels and a 5-year compressor parts warranty.
By Daniel Brooks
Updated October 8, 2026
The BLACK+DECKER BD05MWT6 5,000 BTU Mechanical Window Air Conditioner is a compact, basic unit for small rooms up to 150 square feet. BLACK+DECKER suggests bedrooms, offices, playrooms, cabins and apartments. It is one of the simpler small conventional window air conditioners, with 4.4 stars from 269 ratings.
Its selling points are simplicity, a compact cabinet and a longer compressor parts warranty than most budget units. We evaluated it based on the manufacturer’s specifications.
Our Verdict
This BLACK+DECKER is a solid basic pick for a small room. Its strongest points are the compact 15.98 by 13.19 by 12.05 inch cabinet, two cooling levels, R32 refrigerant, accordion side panels for double-hung windows from 23 to 36 inches wide and as low as 13 inches high, and a warranty of 1 year parts and labor plus a total of 5 years on compressor parts.
The trade-offs are control and noise. As a mechanical unit, it has no remote, timer or eco mode, and the listed noise level is 56 dB. There is no inverter. If you want a simple, compact unit for a small bedroom or office, it is worth considering.
BLACK+DECKER 5000 BTU Window Air Conditioner
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | BLACK+DECKER |
| Model | BD05MWT6 |
| Type | Window air conditioner, mechanical controls |
| Cooling Capacity | 5,000 BTU |
| Room Size (listed) | Up to 150 sq. ft. |
| Efficiency | 11 (listed as SEER), 322.34 kWh per year |
| Noise Level | 56 dB |
| Voltage / Power | 115V, 450W |
| Window Fit | Double-hung, 23″ to 36″ wide, 13″ minimum height |
| Dimensions | 13.19″D x 15.98″W x 12.05″H |
| Weight | 35 pounds |
| Cooling Levels | 2 |
| Compressor | Rotary, no inverter |
| Refrigerant | R-32 |
| Warranty | 1 year parts and labor, 5 years total on compressor parts |
Cooling Capacity and Room Size
BLACK+DECKER rates the BD05MWT6 at 5,000 BTU for rooms up to 150 square feet and suggests bedrooms, offices, playrooms, cabins and apartments. A small bedroom or home office is the best match.
There is little spare capacity at this size. A small room with afternoon sun or several people will push it hard. For a shaded bedroom, study or cabin room, it is a good fit, and the unit runs at two cooling levels to balance speed and noise.
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 BLACK+DECKER’s coverage claim.
Installation and Fit
A window kit with accordion-style side panels fits standard double-hung windows from 23 to 36 inches wide and as low as 13 inches high. An installation kit and user manual are included.
The compact cabinet measures 13.19 inches deep, 15.98 inches wide and 12.05 inches tall, and weighs 35 pounds. One person can lift it, but a helper makes it easier to hold steady while you secure it. Follow the manual and plug it into a standard 115V outlet.
The low 12.05 inch height and shallow depth leave more of the window clear and keep the unit from projecting far into the room.
Noise, Energy Use and Efficiency
The listed noise level is 56 dB, which is typical for a basic small unit. It suits an office or playroom, while light sleepers should use the lower cooling level at night.
The listing gives an efficiency figure of 11, labeled as SEER, annual energy use of 322.34 kWh and a power draw of 450 watts. BLACK+DECKER highlights R32 refrigerant for its zero impact on the ozone layer and its efficiency. The compressor has no inverter.
Controls and Smart Features
The BD05MWT6 is a mechanical unit that runs at two cooling levels. The feature list does not describe a remote, timer or eco mode, so expect to adjust it directly on the unit.
In a small room the unit is usually within reach, so this matters less than in a larger space. Simple controls are easy for anyone in the household to use, with no settings to reset after a power cut beyond switching it back on.
Maintenance and Drainage
The listing does not describe the filter in detail. Check the manual for how to remove and clean it, and plan to clean it every few weeks during the cooling season.
The listing does not describe condensate drainage. Check the manual for how water is handled and for steps to remove and store the unit at the end of the season.
Pros and Cons
| Pros | Cons |
|---|---|
| Compact, low-profile cabinet | No remote control or timer |
| Fits windows as low as 13″ high | No eco or sleep mode |
| R32 refrigerant | Listed noise level of 56 dB |
| 5 years total on compressor parts | No inverter compressor |
| Light at 35 pounds | Only sized for rooms up to 150 sq. ft. |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Small bedrooms, offices and playrooms | Rooms larger than 150 sq. ft. |
| Cabins and occasional-use rooms | Anyone who wants a remote or timer |
| Buyers who value a longer compressor warranty | Light sleepers who need a quieter unit |
| Owners of smaller double-hung windows | Smart home users wanting app control |
| Buyers who prefer simple controls | Casement or sliding window owners |
Final Verdict
The BLACK+DECKER BD05MWT6 5,000 BTU Mechanical Window Air Conditioner is a compact, simple unit with R32 refrigerant, accordion side panels and a 5-year compressor parts warranty. It suits a small bedroom, office or cabin up to 150 square feet. The compromises are no remote, timer or eco mode and a listed 56 dB. You can check the current price and details for the BLACK+DECKER BD05MWT6 5,000 BTU Window Air Conditioner, or compare other window air conditioners for small spaces.
Frequently Asked Questions
What size room is the BLACK+DECKER BD05MWT6 for?
BLACK+DECKER rates it for rooms up to 150 square feet. On the ENERGY STAR chart, 5,000 BTU fits rooms of about 100 to 150 square feet.
What window size does it fit?
It fits standard double-hung windows from 23 to 36 inches wide and as low as 13 inches high.
What warranty does it have?
BLACK+DECKER lists 1 year labor and parts for manufacturing defects, and a total of 5 years for compressor parts.
Does it have a remote?
The feature list describes a mechanical unit and does not mention a remote. Check the manual if a remote matters to you.
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.