10 Best Heat And Cool Window Units 2026 in the United States

The LG 18,000 BTU Heat and Cool Window Air Conditioner with WiFi Controls is a versatile unit designed for medium to large rooms up to 1,000 sq. ft. It offers both heating and cooling functions, making it suitable for year-round use. One of its standout features is the LG ThinQ technology, which allows you to control the unit remotely via your phone or through voice commands with Amazon Alexa and Google Assistant. This adds a layer of convenience, allowing you to adjust settings from anywhere.

The unit has customizable cooling and heating options with 2 speeds for both, along with a 24-hour timer to create a personalized schedule. Additionally, the auto restart feature ensures your comfort isn't disrupted by power outages, as the unit will resume operation automatically. Installation should be straightforward with the included window installation kit, and its dimensions are relatively standard for window units, though its weight (126.5 pounds) might require some assistance to install.

In terms of energy efficiency, the unit has an EER of 11.1, which is decent but not the highest in its class, and it does not have an Energy Star rating. Noise levels are rated at 57 dB, which is moderate; it may not be the quietest unit but is by no means excessively loud. Additional features include a remote control, filter light reminder, and dehumidifying function. This air conditioner is ideal for someone looking for a reliable, year-round heating and cooling solution with modern smart features.

The LG 7,600 BTU window air conditioner with heat is a solid choice for those looking to cool or heat medium-sized rooms up to about 330 square feet, like bedrooms or small living rooms. Its cooling capacity is suitable for spaces around 16 by 20 feet, which makes it ideal for apartments or single rooms. With a Seasonal Energy Efficiency Ratio (SEER) of 11.3, it offers decent energy efficiency, helping to keep electricity costs moderate. Noise levels are quite low, at about 50 decibels on low speed, so it won’t disturb your sleep or work. The unit has two fan speeds for both cooling and heating, giving you flexibility in adjusting airflow and temperature. Installation is typical for a window unit and it comes with a slide-in/out chassis, which simplifies setup and removal.

Additional conveniences include a remote control, a 24-hour timer, auto restart after power outages, and a filter reminder light, adding to user comfort and ease of maintenance. However, it is somewhat heavier than some other models at 69 pounds, which could make installation trickier for one person. Also, while it provides supplemental heating, it may not be sufficient for very cold climates or larger rooms. The one-year warranty covers parts and labor, which is standard but worth noting. This LG unit balances cooling and heating needs with quiet operation and useful features, making it a good pick for those who want year-round climate control in a moderate space without complicated installation.

The ROVSUN 18000 BTU window unit provides both cooling and heating for rooms up to 1000 square feet, making it suitable for medium to large rooms such as living rooms or offices. It offers quick temperature adjustment with a digital thermostat and multiple modes including fan, heater, and dehumidifier, adding versatility beyond just cooling. Installation is made easier with included mounting kits and clear instructions, though checking your window dimensions and voltage compatibility beforehand is important.

The unit runs quietly at about 56-59 decibels, so it won’t be very disruptive whether you’re relaxing or sleeping. Energy efficiency is decent, with a SEER rating of 14.5 and Energy Star certification, helping to save on electricity bills. The remote control and timer add convenience for everyday use. Its size and 115V voltage requirement may limit compatibility with certain window setups or electrical systems.

This unit is a strong option for those needing a multi-functional, moderately energy-efficient heat-and-cool window air conditioner for medium-sized spaces, but it is advisable to verify the exact cooling capacity and ensure home compatibility before purchase.