10 Best Window Units With Heat 2026 in the United States

The Midea Inverter Window Air Conditioner with Heat is a solid choice if you want a versatile window unit for both cooling and heating in rooms up to 550 square feet. It offers a strong 12,000 BTU cooling capacity combined with a heat pump function for mild winter warmth. Energy-wise, it’s efficient with a CEER of 13.3 and Energy Star certification, helping save on electricity without compromising comfort.

One of its standout features is its quiet operation at just 45 decibels, which is gentle enough for bedrooms or living spaces without being distracting. Installation fits common double-hung windows between 24 to 38.5 inches wide, and the unit includes a remote, installation kit, and smart controls via an app or voice assistants, making it easy to adjust settings from anywhere. The built-in dehumidifier and washable filter add extra convenience.

The heating function won’t work if outdoor temperatures drop below 41°F, so it’s best for mild cold weather rather than harsh winters. Also, at about 58 pounds, it’s a bit heavy, so installation may require some help. If you want an efficient, quiet, and smart-controlled window unit that handles both cooling and supplemental heating well, the Midea is a reliable option—just keep in mind its heating limits in colder climates.

The Midea 14,000 BTU Smart Inverter Window Air Conditioner is a solid choice for cooling rooms up to 700 square feet, making it suitable for medium to large spaces like living rooms or big bedrooms. Its inverter technology helps it cool quickly while using about 35% less energy compared to standard models, which is a nice way to save on electricity bills. The unit is Energy Star certified with a strong energy efficiency rating, reflecting its good performance without wasting power. Noise levels are impressively low at 41 dB, so it runs quietly enough not to disturb conversations or TV shows, and it even produces gentle white noise that can help with sleep.

Installation is user-friendly, with a kit included for window mounting, and the compact size fits most standard windows. Extra features like an easy-to-clean washable filter, dehumidifier function, and multiple operation modes add convenience. It also offers smart controls via an app and voice assistants like Alexa and Google, which is handy for adjusting settings remotely.

This Midea model is ideal if you prioritize quiet, energy-efficient cooling with smart features and easy installation, though users should consider their heating needs separately to ensure this unit meets that requirement.

The Keystone 23,200 BTU Window-Wall Air Conditioner is designed for large rooms up to 1,500 square feet, making it a good choice if you need strong cooling power. It also includes 16,000 BTU of supplemental heat, which can help warm your space when temperatures are mild, but it shouldn't be relied on as your main heat source. With a Seasonal Energy Efficiency Ratio (SEER) of 9.4, this unit is reasonably efficient and offers energy-saving modes like 'Energy Saver' and 'Sleep' to help reduce electricity costs. Noise level is moderate at 56.3 decibels, which is typical for units of this size—noticeable but not overly disruptive.

Installation is versatile as it fits both window and wall spaces, saving floor space and coming with a window installation kit; it requires a minimum window height of 19.5 inches and is fairly large (about 25 by 24 by 18 inches), so make sure your space can accommodate it. The included smart remote control is a convenient feature that measures room temperature and adjusts settings automatically every few minutes, enhancing comfort without constant manual adjustments. Additional perks are a built-in dehumidifier to reduce humidity, a filter light reminder to prompt regular maintenance, and a 4-way air swing for better airflow distribution.

This is a heavy unit (121 pounds), making installation potentially challenging without help. Also, while the heating feature is useful for mild weather, it won’t replace a dedicated heating system in colder climates. If you need a reliable, multi-function window or wall unit for cooling large spaces with occasional heating, this Keystone model offers solid performance with helpful features, but be prepared for its size and weight during installation.