10 Best Window Units With Heat 2026 in the United States

The Whirlpool 18,000 BTU Window Air Conditioner with Supplemental Heat is designed for large spaces up to 1000 square feet. It offers significant cooling power with 18,000 BTUs and supplemental heating up to 10,600 BTUs, making it versatile for year-round use. It has an Energy Efficiency Ratio (EER) of 10.7, which is reasonably efficient, though it has only a 1-star Energy rating. The noise level is 56 dB, which is moderate and may be noticeable in quieter environments.

Installation is straightforward with the included mounting kit, though the unit's dimensions and weight (23.6 x 25.4 x 18.7 inches; 108.7 pounds) suggest assistance may be needed during setup. The unit includes an electronic control panel with a digital display, three cooling speeds, eco and sleep modes, a 24-hour programmable timer, and 8-way directional air louvers. The remote control adds convenience, and the reusable filter is easily washable to maintain air quality.

This Whirlpool unit is best suited for users looking for a powerful cooling and supplemental heating solution in larger rooms, with the convenience of programmable settings and remote control functionality. It receives high customer satisfaction with an average rating of 4.3 out of 5 stars from over 1,000 reviews, indicating generally positive user experiences.

The LG 18,000 BTU Heat and Cool Window Air Conditioner is a strong choice if you need a reliable unit for medium to large rooms, up to 1,000 square feet. Its 18,000 BTU cooling and heating capacity means it can keep sizable spaces comfortable through summer and winter, making it versatile for year-round use. The supplemental heating option adds real value for colder days, which not all window units provide. One of its standout features is the smart control capability—using LG ThinQ technology, you can adjust settings remotely via your phone or voice commands with Alexa and Google Assistant, which is convenient for modern living. It also has two fan speeds and a 24-hour timer to help customize comfort and energy use.

Noise-wise, it runs at 57 dB, which is moderately loud but typical for a unit this powerful; it might be noticeable in very quiet rooms. The size and weight are on the larger side, so ensure your window can accommodate its 30.5 x 25.5 x 16.84-inch frame and that installation is manageable for you. One drawback is its Energy Efficiency Ratio (SEER) of 11.1 and the absence of an Energy Star rating, meaning it might not be the most energy-saving option, which could affect your electricity bill over time. However, features like auto restart after power outages and a filter light reminder add to ease of use and maintenance.

If you want a smart, powerful window unit that heats and cools efficiently for medium to large rooms and don’t mind a slightly higher energy use, this LG model is worth considering.

The Whirlpool WHHW081AW is an 8,000 BTU window air conditioner that also provides 4,000 BTU of supplemental heating, making it suitable for spaces up to 350 square feet. This unit is effective in delivering cooling and heating but is not designed to be the primary heating source during the coldest months. It features an electronic control panel with a digital display, three cooling speeds, an eco mode, sleep mode, and a programmable 24-hour on/off timer, along with 8-way directional air louvers for customized comfort.

The included remote control allows you to adjust settings from a distance, which adds convenience. Installation is straightforward with the provided window mounting kit, which fits windows with a minimum height of 19.5 inches. The unit also includes a reusable filter that helps remove dust and contaminants from the air, which is easy to clean and maintain. However, the noise level is 52 dB, which might be a bit louder than some users prefer.

Additionally, the SEER rating of 10.9 and a single Energy Star rating indicates it is moderately energy-efficient but not the top in its class. This product is well-suited for those looking for a combination of cooling and supplemental heating in a single unit, especially in apartments, living rooms, or bedrooms.