10 Best Window Unit Air Conditioners And Heaters 2026 in the United States

The Midea MAW08HV1CWT EasyCool Smart Inverter Air Conditioner Window Unit with Heat is a versatile option for those needing both cooling and heating. With 8,000 BTU, it is effective for rooms up to 350 square feet. Its variable-speed inverter technology and Energy Star certification suggest it is energy efficient, potentially saving up to 35% on electricity costs.

The unit operates quietly at 45 dB, making it ideal for bedrooms or home offices without causing disturbances. The multi-season functionality, with five modes and three-speed settings, adds flexibility for different weather conditions. The smart home compatibility through WiFi and voice control via Alexa or Google Assistant provides modern convenience, allowing control from anywhere. However, the heating function has limitations as it works only when the outside temperature is above 41°F.

Installation requires specific window dimensions, which could be restrictive for some users. The unit comes with a washable filter, contributing to ease of maintenance. On the downside, the product's weight of 56 pounds may require additional help during installation. Users would likely appreciate its performance and features despite some installation and heating limitations.

The Whirlpool 12,000 BTU window air conditioner with supplemental heat is a solid choice for cooling and light heating in rooms up to about 550 square feet, like apartments or bedrooms. It offers strong cooling power with 12,000 BTUs, which should keep medium-sized spaces comfortable during warm months. The supplemental heat feature provides extra warmth but isn’t designed to replace a main heater in very cold weather, so it’s best for mild heating needs.

The unit has a decent energy efficiency rating (SEER 10.9), although it only has a 1-star BEE rating, meaning it’s not the most energy-saving option available. Noise level sits at 59 dB, which is average—noticeable but not too disruptive for most living areas. Installation is straightforward thanks to a quick-mount window kit, but the window needs to be at least 19.5 inches tall to fit. Controls are user-friendly with an electronic panel, digital display, and remote control, allowing you to adjust temperature, fan speeds, sleep mode, and timers easily from across the room.

The reusable air filter helps keep the air clean and is easy to remove for washing, which is a nice benefit for maintaining air quality and unit performance. The unit is fairly large and heavy (around 78 pounds), so it might require some effort to install or move. This AC and heater combo performs well if you need reliable cooling with occasional heating in a medium room, but if energy efficiency or very quiet operation is a top priority, there might be better options.

The Cooper & Hunter 15,000 BTU PTAC unit is a solid choice for those needing both air conditioning and heating in a single window or wall-mounted unit. With a cooling power of 15,000 BTU, it can comfortably cover up to about 800 square feet, making it suitable for hotel rooms, apartments, or small homes. The built-in 3.5 kW electric heater adds reliable warmth during colder months, supporting year-round use. Its energy efficiency looks good with a SEER of 20, which helps in reducing electricity costs compared to less efficient models. Noise is moderate at 52.5 decibels — not silent but generally quiet enough for most indoor settings without being disruptive.

Installation requires a standard 230V outlet and the correct wall sleeve and grille if not already present, which can add to setup work and cost. Controls are user-friendly: you get a remote, a digital panel, and even a wireless smart kit enabling WiFi control for convenience. This allows easy adjustments without needing to be near the unit. Features like auto defrost, auto restart, and fresh air ventilation add extra comfort and efficiency.

The unit is quite heavy (108 pounds) and ships via freight to a nearby delivery point, so moving it inside might require effort or professional help. It does not have a BEE star rating, which some buyers look for assurance on energy savings. This unit is well-suited for those needing a dependable, all-season cooling and heating solution with smart controls, especially in spaces around 800 square feet. However, installation and handling may be more complex than smaller window units.