10 Best Two Zone Mini Split Air Conditioners 2025 in the United States

The DELLA 18K BTU two-zone mini split air conditioner is an efficient option for those looking to cool or heat multiple rooms. With a BTU rating of 18,000 (split as 12,000 BTU for each zone), it effectively covers up to 1100 square feet. Its SEER2 rating of 20 indicates high energy efficiency, promising up to 30% in power savings, which is great for reducing electricity bills. Additionally, it includes a heat pump that works well even in colder temperatures, down to -4℉.

The noise level is impressively low, operating at just 41 dBa, ensuring a quiet environment. Installation requires professional handling due to the necessity of line-set vacuuming and potential freon adjustments, which could mean additional costs. Users should be aware that while it features a variety of smart functions and modes for convenience, the self-cleaning function is not supported despite being visible on the display.

It is also compatible with Alexa, adding to its smart home integration capabilities. This air conditioner would suit individuals needing efficient climate control for larger spaces and who are prepared to invest in professional installation.

The Della 18K BTU Dual Zone Mini Split Air Conditioner is designed to cool and heat two separate rooms, with indoor units rated at 9,000 BTU and 12,000 BTU respectively, covering up to 950 square feet total. Its 19 SEER2 rating means it’s quite energy efficient, which can help lower electricity bills compared to older or less efficient models. It also runs quietly at 41 decibels, so it won’t be disruptive in your living space. This system includes smart features like Alexa compatibility and WiFi control, making it convenient to adjust settings remotely.

The heat pump works efficiently even in cold weather down to about 5°F, expanding its usefulness beyond just cooling. Installation is not a DIY job, as it requires professional setup including vacuuming the refrigerant lines and adjusting freon levels if lines are altered. One downside is that it does not support the self-cleaning function, which some users might expect in a modern unit. The system offers multiple modes like turbo, sleep, and energy-saving to tailor performance to your needs.

This model is a solid choice for those needing reliable, energy-saving comfort in two rooms, especially if you want smart home features and quiet operation, but be prepared for professional installation and no self-cleaning option.

The Della 18K BTU Dual Zone Mini Split Air Conditioner is a solid choice for those needing efficient cooling and heating in multiple rooms. It boasts a respectable 20 SEER2 rating, making it energy efficient, which is great for keeping energy bills low. With the ability to cool or heat spaces up to 800 square feet, it effectively serves two rooms, thanks to its two 9,000 BTU indoor units. Users will appreciate the smart features, such as WiFi connectivity and Alexa compatibility, which allow for convenient control and scheduling.

Noise level is another strength, operating quietly at just 41 dBa—ideal for bedrooms or living areas where noise can be disruptive. The unit's multiple fan speeds, eco mode, and 24-hour timer provide added comfort and flexibility.

It’s important to consider the installation requirements. This system mandates professional installation, which may be a downside for those looking for a DIY option, and the installation process includes vacuuming the line set, which could complicate things for some. Additionally, while it provides a good range of features, the absence of a self-cleaning function, despite having that option on the display, might be seen as a limitation.