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 23,000 BTU Window Air Conditioner with Heat is a powerful unit designed to serve large rooms up to 1,400 square feet, making it suitable for living rooms, dens, bedrooms, or offices. It offers both cooling and heating functions, making it versatile for year-round use. With a high cooling power of 23,000 BTU, it can efficiently cool large spaces. The heating capacity is an added bonus for cooler days, providing supplemental heat to maintain a comfortable temperature indoors.

Its Energy Efficiency Ratio (EER) is 11.3, which is decent but not the best in its class, and it is not Energy Star rated, meaning it might not be the most energy-efficient option available. However, it operates at a relatively low noise level of 50-51 dB, ensuring minimal disturbance during operation. The unit also features multiple fan speeds for customizable airflow, a remote control for convenience, and an Auto Restart function, which is handy in the event of power outages.

Installation might be a bit cumbersome due to its large size and weight (145 pounds), so assistance may be needed. Additional features include a filter light reminder, dehumidifier function, and a 1-year parts and labor warranty. This window unit is ideal for those who need a robust and versatile cooling and heating solution for larger rooms, but it might not be the best choice for energy-conscious buyers.

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.