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 ROVSUN 12000 BTU window air conditioner with heat is designed to cool and warm rooms up to about 550 square feet, making it suitable for medium-sized spaces like apartments or offices. With 12,000 BTU power, it offers quick temperature control, and its heating feature adds versatility for year-round comfort. Operating is straightforward, thanks to a clear LED display and remote control, allowing easy adjustments for fan speeds, timer, and modes. Installation is made simpler with included mounting kits and side panels, though it's important to check your window size and voltage compatibility (208/230V) before buying. Noise levels are reasonably low at 51 decibels, so it shouldn’t disrupt daily activities or sleep. The unit uses environmentally friendly R410A refrigerant and a high-quality compressor intended for energy savings and durability, though the Energy Efficiency Ratio (EER) is noted as low, which means it may consume more electricity compared to more efficient models. The filter is slide-out type, simplifying cleaning and maintenance.

If you want a reliable, easy-to-use window unit that combines cooling and heating in one, and you have a medium-sized room, this ROVSUN model provides a solid balance of features and value. However, if energy efficiency is a top priority, you might find better options elsewhere.

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.