10 Best Window Units With Heat 2026 in the United States

The Midea MAW08HV1CWT EasyCool Smart Inverter Air Conditioner Window Unit with Heat is a versatile option designed for year-round comfort. With an 8,000 BTU rating, it effectively cools and heats rooms up to 350 square feet. The unit performs well in terms of energy efficiency with a SEER of 14.5, potentially saving up to 35% on energy costs compared to standard models. It is Energy Star certified, ensuring lower electricity bills while maintaining comfort. Noise levels are impressively low, with operation as quiet as 45 dBA, which is ideal for maintaining a peaceful environment, whether you're working, watching TV, or sleeping.

Installation is straightforward, fitting double-hung windows with specific dimensions, and the included installation kit simplifies the process. Smart features enhance usability, including WiFi connectivity, compatibility with voice assistants Alexa and Google Assistant, and control via the SmartHome App. These features make it convenient to operate from anywhere.

However, it’s important to note that the heating function is supplementary and works best when outdoor temperatures are above 41°F, which might limit its use in colder climates. Also, at 56 pounds, the unit might be a bit heavy for some users to install by themselves. The remote control and washable filter are practical additions, contributing to ease of use and maintenance. For those looking for a smart, quiet, and energy-efficient unit that offers both cooling and heating, the Midea MAW08HV1CWT is a strong contender.

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 Keystone Energy Star 12,000 BTU window AC unit with supplemental heat is a solid choice for cooling and light heating in medium to large rooms up to 550 square feet. Its 12,000 BTU cooling power is strong enough for most apartments or larger rooms, while the supplemental heating offers 10,000 BTUs, designed to help when outdoor temperatures are moderately cool (41-75°F). This heating function is not intended to replace a primary heating system but can provide added comfort during shoulder seasons. The unit uses inverter technology to adjust power use efficiently, making it 18% more energy-efficient than typical window units.

This technology also contributes to a lower noise level—about 58 decibels—which is quieter than many similar models and suitable for bedrooms or living areas where minimal disruption is desired. Installation is straightforward for windows between 14.5 inches tall and 24 to 38.5 inches wide, fitting many homes. The washable filter with a clean filter alert simplifies maintenance and helps keep the unit running efficiently.

Some users sensitive to noise might find the sound level noticeable, and the supplemental heat is insufficient for very cold climates. The unit’s size and weight (58 pounds) may require assistance during installation. It comes with a remote and a one-year limited warranty, adding convenience and peace of mind. This Keystone model effectively balances performance, energy savings, and ease of use for those needing reliable cooling and occasional heating in mild conditions.