For cooling and heating small spaces around 400 square feet, mini split air conditioners offer efficient and versatile solutions. These ductless systems provide targeted temperature control with energy-saving features and easy installation. Below is a summary table of top-performing mini splits designed for cooling rooms close to 400 sq. ft, helping you compare specifications at a glance.
| Product | BTU Capacity | Energy Efficiency (SEER2) | Heating Capability | Coverage Area |
|---|---|---|---|---|
| DELLA Vario Series 9000 BTU Mini Split | 9000 BTU | 19 SEER2 | Heat Pump, Down to -4℉ | Up to 400 Sq. Ft |
| DELLA Hyper Heat 9000 BTU WiFi Mini Split | 9000 BTU | 23 SEER2 | Heat Pump, Down to -13℉ | Up to 400 Sq. Ft |
| ROVSUN 9000 BTU Wifi Enabled Mini Split | 9000 BTU | 19 SEER2 | Heat Pump | Up to 400 Sq. Ft |
| DELLA Motto Series 12000 BTU WiFi Mini Split | 12000 BTU | 20 SEER2 | Heat Pump | Up to 550 Sq. Ft |
| Manastin 12000BTU Mini Split Air Conditioner & Heater | 12000 BTU | 17 SEER2 | Heat Pump | Up to 750 Sq. Ft |
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- DELLA Vario Series 9000 BTU Mini Split AC for 400 Sq.Ft
- DELLA Hyper Heat 9000 BTU WiFi Mini Split with Alexa
- ROVSUN 9000 BTU Wifi Enabled Mini Split AC & Heater
- DELLA Motto Series 12000 BTU WiFi Mini Split for Larger Rooms
- Manastin 12000BTU Mini Split AC & Heater for Up to 750 Sq. Ft
- Buying Guide for Mini Split AC Units for 400 Sq Ft Spaces
DELLA Vario Series 9000 BTU Mini Split AC for 400 Sq.Ft
This 9000 BTU mini split AC offers 19 SEER2 energy efficiency and ETL/AHRI certification ensuring reliable performance and power savings of up to 30%. It is perfect for rooms up to 400 sq. ft and can operate in cold conditions down to -4°F with its built-in heat pump. The ductless inverter technology enables quiet operation with smart features like 4D airflow direction, timer, sleep and eco modes, and multiple fan speeds. Included is a full installation kit with copper pipes and a long drain pipe for easy setup.
DELLA Hyper Heat 9000 BTU WiFi Mini Split with Alexa
This DELLA Hyper Heat Mini Split provides 23 SEER2 rating — one of the highest energy efficiencies available in this size category. The unit excels in cooling and heating for rooms up to 400 sq. ft, with hyper heat functionality allowing heating performance to -13°F. Connectivity features include WiFi and Amazon Alexa compatibility through the Della+ app, supporting convenient remote control. The system supports five operation modes, 4D airflow, sleep and eco settings. The kit contains a 16.4ft copper line set and drain pipe. Professional installation is recommended.
ROVSUN 9000 BTU Wifi Enabled Mini Split AC & Heater
The ROVSUN 9000 BTU mini split offers versatile cooling and heating with a wide temperature range of 61°F to 88°F, ideal for year-round comfort in spaces up to 400 sq. ft. Featuring 19 SEER2 inverter technology, it automatically adjusts compressor speed for up to 35% energy savings. The unit is designed for whisper-quiet operation at 28dB, with balanced air distribution. This mini split is suitable for residential and light commercial applications, coming with a pre-charged condenser and installation kit for easier setup.
DELLA Motto Series 12000 BTU WiFi Mini Split for Larger Rooms
This 12000 BTU mini split model from Della cools rooms up to 550 sq. ft, offering more capacity for slightly larger spaces. It has an impressive 20 SEER2 rating and uses inverter plus system with a heat pump. The remote control features a smart sensor that senses room temperature at the controller for optimal comfort. Like other Della units, it includes 4D airflow, multiple fan speeds, turbo mode, and eco energy saving options. A complete 13ft copper line and drain installation kit is included.
Manastin 12000BTU Mini Split AC & Heater for Up to 750 Sq. Ft
The Manastin 12000 BTU mini split is designed for medium rooms up to 750 sq. ft but works efficiently in smaller spaces. It cools quickly within 30 seconds and heats within 60 seconds. Equipped with 17 SEER2 inverter technology and eco-friendly R32 refrigerant, it balances energy efficiency and environmental responsibility. The unit offers five operating modes, four fan speeds, and features such as turbo, sleep, and eco mode for customized comfort. A complete installation kit is included for ease of setup.
Buying Guide for Mini Split AC Units for 400 Sq Ft Spaces
Choosing the right mini split for a 400 sq ft area requires careful consideration of several key factors to ensure efficient year-round comfort:
- Cooling and Heating Capacity: For a 400 sq ft room, 9000 BTU capacity is typically sufficient. Avoid oversizing, which can reduce efficiency and cause humidity issues.
- Energy Efficiency (SEER2 Ratings): Look for systems with SEER2 ratings above 17 for the best balance of performance and energy savings. Higher ratings can reduce electricity bills in the long run.
- Heating Performance in Cold Weather: If you live in colder climates, select models with a low-temperature heat pump (e.g., functioning down to -10°F or lower) to maintain warmth during winter.
- Smart Features and Connectivity: WiFi-enabled units with app control and voice assistant compatibility offer enhanced convenience and remote operation.
- Installation Kit Included: Purchasing a unit that includes copper lines, drain pipes, and other installation components simplifies setup. Always consider professional installation to ensure warranty validity and optimal function.
- Noise Levels: Look for equipment designed for quiet operation, especially if the unit is installed in bedrooms or workspaces.
- Airflow and Comfort Control: Multi-directional airflow, adjustable fan speeds, and modes like eco, sleep, and turbo improve comfort customization.
- Environmental Impact: Systems using R32 refrigerants offer lower environmental impact compared to older refrigerants.
Assess your specific space, climate, and usage patterns to find the ideal mini split that combines efficiency, comfort, and smart capabilities for a room around 400 square feet.