Costway 8000 BTU Portable Air Conditioner with Dehumidifier Function review

Costway's 8,000 BTU unit is the budget pick, and at $269.99 it costs $240 less than the next cheapest verified price here. Costway rates it for spaces up to 230 sq ft, which makes it a bedroom, dorm or small office unit rather than a living room unit. It offers cooling, dehumidifying, fan and sleep modes, and sleep mode lowers the working noise to under 52 dB. There are 2 fan speeds and a 24-hour programmable timer. Costway lists an airflow rate of 300 cubic meters per hour. For water, it has a water-full warning and a 10 ft drain hose, so you can drain it into a bathroom rather than empty a tray. Four casters and a remote control are included, along with the exhaust hose and a window seal plate. Costway's store lists free shipping, 30-day returns and a 365-day warranty. The limits are clear: Costway gives only the ASHRAE rating, not the lower DOE figure, there is no app, and it will struggle in rooms much larger than 230 sq ft.

Who it is for

small bedrooms and dorms up to 230 sq ft on a tight budget

Price

$269.99 on Costway's US store.

$269.99 select: 8000 btu
Quoted from the vendor pricing page on November 14, 2026.

Key features

• 8,000 BTU ASHRAE cooling for spaces up to 230 sq ft
• Cool, dehumidify, fan and sleep modes
• Sleep mode lowers noise to under 52 dB
• 24-hour programmable timer
• 10 ft drain hose and water-full warning

Strengths and weaknesses

• Strength: Lowest price on this list at $269.99
• Strength: 365-day warranty and 30-day returns on Costway's store
• Strength: Remote control and four casters included
• Weakness: 230 sq ft rating suits only small rooms
• Weakness: Costway does not publish a DOE or SACC rating
• Weakness: Only 2 fan speeds

Key facts

• Cooling (ASHRAE): 8,000 BTU
• Room size: Up to 230 sq ft
• Noise: Under 52 dB in sleep mode
• Airflow: 300 m3/h
• Warranty: 365 days

Where it ranks

Costway 8000 BTU Portable Air Conditioner with Dehumidifier Function is No. 8 in our Best Portable Air Conditioners verdict.