10 Best Window Unit Air Conditioners 2025 in the United States

The TCL H14W35W window air conditioner offers a strong cooling capacity of 14,000 BTU, making it suitable for rooms up to about 700 square feet. This level of power is ideal for cooling larger rooms or open living spaces. It features a 3-in-1 function with air conditioning, fan, and dehumidifier modes, providing flexibility for different comfort needs beyond just cooling. You can control the unit conveniently via a remote, mobile app, or voice commands through Alexa, Google Assistant, or Siri, supporting smart home integration.

In terms of energy efficiency, it has a Seasonal Energy Efficiency Ratio (SEER) of 11.0, which helps reduce electricity costs, especially when using its Sleep and Eco modes. At 53 decibels, the noise level is moderate—noticeable but generally not too disruptive during operation. Installation is designed to be straightforward with an included kit, although basic DIY skills such as using a screwdriver and drilling pilot holes might be necessary depending on your window frame. The unit's size is fairly compact for a 14,000 BTU model, but ensuring your window fits the required dimensions (26-36” wide by 16” height) is important.

This air conditioner uses R-32 refrigerant, which is more environmentally friendly, though it may not be serviceable by all technicians everywhere. The product includes a 1-year limited warranty. The TCL H14W35W is a strong choice for those needing a powerful, energy-conscious air conditioner with smart features and multi-functionality for medium to large rooms, provided users are prepared for basic installation and measure their window space beforehand.

The Amazon Basics 5000-BTU window air conditioner is a solid choice for cooling small rooms up to 150 square feet, such as bedrooms or home offices. With 5000 BTU of cooling power, it can comfortably handle these spaces without wasting energy. Its energy efficiency ratio (SEER 14) suggests it uses power reasonably well, helping keep electricity bills in check. Noise level is quite low at 56 dB, which means it won’t be too disruptive during sleep or work, a benefit for quiet environments.

Installation is straightforward for most standard windows (23" to 36" wide), thanks to adjustable side panels and a complete mounting kit, although basic tools like a screwdriver are needed. The unit offers simple mechanical controls with seven temperature settings and two fan speeds, providing decent control over comfort. Additionally, the washable filter helps trap dust and allergens, making maintenance easy and improving air quality. It also features a fan-only mode and two-way air direction control for added flexibility.

This unit is designed specifically for small rooms and won’t be effective in larger spaces. It also lacks smart features like remote control or Wi-Fi connectivity, which some competing models offer. For those seeking a budget-friendly, easy-to-use air conditioner for a small room with decent energy efficiency and quiet operation, this model is a fitting option.

The Midea MAW12HV1CWT EasyCool Smart Inverter Air Conditioner Window Unit with Heat is a versatile option for those seeking both cooling and heating solutions. With a cooling capacity of 12,000 BTUs, it is well-suited for large rooms up to 550 square feet. The unit is energy-efficient, boasting a Seasonal Energy Efficiency Ratio (SEER) of 13.3, which promises up to 35% energy savings compared to standard units. This makes it a cost-effective choice for long-term use. The inverter technology also adds to its efficiency by adjusting the compressor speed according to the room’s cooling needs.

The heating function has limitations, as it will not work if the outside temperature falls below 41°F. This is something to consider if you live in an area with colder winters. One of the standout features is its ultra-low noise performance, operating at just 45 dB at its quietest. This makes it suitable for bedrooms, home offices, and living rooms where minimal noise is appreciated. The installation process seems straightforward, fitting double-hung windows with specific dimensions. The unit is a bit bulky, weighing 58 pounds, so some users might need assistance with installation.

Additional features like WiFi capability, voice control through Alexa and Google Assistant, and a SmartHome App add to its convenience. You can control it remotely, which is a handy feature for tech-savvy users. The LED display and multiple modes (Heat, Auto, Cool, Dry, Fan) make it easy to use and customize. The included remote control and installation kit are also helpful. Despite its many strengths, the Midea MAW12HV1CWT does have a few drawbacks. The heating function’s limitation can be a significant downside for those in colder climates. Moreover, while the unit is relatively quiet, it might still be noticeable in extremely quiet environments. This air conditioner is ideal for someone looking for a multi-functional, energy-efficient unit with modern features, but it may fall short for those needing robust heating in very cold conditions.