10 Best Air Conditioners 2026 in the United States

The Goodman 3.5 Ton 15.2 SEER2 Heat Pump System is designed as a solid choice for homeowners needing reliable heating and cooling with moderate energy efficiency. With a cooling capacity of 42,000 BTU (3.5 tons), it can comfortably manage the temperature in a medium to large-sized home. The SEER rating of 15.2 means it meets current efficiency standards and should help keep energy bills reasonable, although there are more efficient models available if maximum savings are a priority. The system uses R-32 refrigerant, which is better for the environment compared to older types. Noise level is around 72 decibels—noticeable but not overly disruptive, similar to the sound of a loud conversation.

This is a split system, combining a heat pump and a multi-positional air handler, meaning it can be installed in different configurations to fit various home layouts. The air handler’s corrosion-resistant design and 9-speed blower motor support reliable and flexible operation. Additional perks include an air purification filter to improve indoor air quality and a 10-year parts warranty when professionally installed and registered, providing peace of mind.

If you live in a colder climate, it's important to note that a heat kit must be purchased separately for effective heating. Installation might require extra accessories depending on your setup, such as a downflow kit. While this Goodman system is not the quietest or most energy-efficient option on the market, it delivers solid performance with a good balance of features, making it a practical option for many homeowners seeking dependable year-round comfort.

The Senville LETO Series Mini Split Air Conditioner Heat Pump offers a substantial cooling capacity of 12,000 BTU, making it suitable for cooling medium-sized rooms. One of its standout features is the high Seasonal Energy Efficiency Ratio (SEER) of 20.8, which indicates it operates efficiently and could help reduce electricity bills. The inclusion of a DC Inverter further enhances its energy efficiency and performance consistency.

This model supports voice control through Alexa, allowing for convenient adjustments via app or voice commands from anywhere, which could be appealing to tech-savvy users or those who enjoy smart home integration. Additionally, it serves multiple roles as an air conditioner, heat pump, dehumidifier, and fan, making it versatile for year-round use. The unit operates relatively quietly, which is ideal for bedrooms and living areas where noise can be disruptive.

It does require professional installation, which might add to the initial cost. Although it comes with a comprehensive 5-year warranty on parts and the compressor, labor costs for installation are not covered. The product does not meet Energy Star compliance, which might be a consideration for eco-conscious buyers. Its compact and stylish design allows it to blend into both residential and commercial settings without compromising aesthetics. The package includes necessary installation components, making it convenient, but the pre-loaded refrigerant accommodates only up to 25 ft, which could limit installation flexibility in larger spaces.

The Daikin 9,000 BTU Oterra Series mini-split air conditioner is a strong choice for anyone looking to cool or heat a room up to about 400 square feet. Its cooling capacity of 9,000 BTUs is suitable for small to medium spaces like sunrooms, basements, or bedrooms. One standout feature is its very high energy efficiency, with a SEER rating of 21 and EER of 12.5, which means it uses electricity smartly, helping to keep your utility bills lower compared to less efficient models.

This unit is also quite quiet, operating at around 30 decibels, which is quieter than a typical conversation, making it good for bedrooms or offices where low noise is important. Being a ductless mini-split system, it installs on the wall and doesn't require bulky ductwork, so it's a good option if you want efficient climate control without major renovations. Additionally, it features advanced functions like automatic defrosting, energy-saving ECO+ mode, and a special air filter that helps clean the air, which adds to comfort and convenience. It works well in different climates, providing heating even when it’s quite cold outside, which extends its usefulness year-round.

Installation requires professional help and the included kit, which adds some complexity and cost upfront. Also, while the unit is highly efficient, the cooling power maxes out at 11,200 BTUs, so it might not suit larger rooms or very hot climates. The price tends to be higher than basic window or portable ACs, reflecting its advanced technology and features. This Daikin mini-split is ideal for users needing quiet, efficient, and flexible heating and cooling in medium-sized rooms without ductwork, especially if energy savings and air quality are priorities.