Finding the best mini split for 900 sq ft requires balancing cooling capacity, energy efficiency, and smart features. Mini split systems are an ideal solution for controlling temperatures in medium-sized rooms or apartments. Below is a summary table of top-rated mini splits, followed by detailed reviews of each unit to help you make an informed choice.
| Product | BTU | Coverage Area | Energy Efficiency (SEER2) | Smart Features | Heating Capability |
|---|---|---|---|---|---|
| DELLA Econo Series 16500 BTU Mini Split | 16500 BTU | Up to 1000 Sq. Ft | 17 SEER2 | WiFi Enabled, Alexa Compatible | Heat Pump Heating |
| DELLA Motto Series 12000 BTU Wifi Enabled Mini Split | 12000 BTU | Up to 550 Sq. Ft | 20 SEER2 | WiFi Enabled, Alexa Compatible | Heat Pump Heating |
| DELLA 18K BTU ODU 2 Dual Zone Mini Split | 9000 + 9000 BTU (dual indoor units) | Up to 800 Sq. Ft (combined) | 19 SEER2 | WiFi Enabled, Alexa Compatible | Heat Pump Heating |
| Manastin 12000BTU Mini Split Air Conditioner & Heater | 12000 BTU | Up to 750 Sq. Ft | 17 SEER2 | Multiple Modes, Timer, Turbo | Heat Pump Heating |
| COSTWAY 12000BTU Mini Split Air Conditioner & Heater | 12000 BTU | Up to 750 Sq. Ft | 20 SEER2 | Remote Control, Multiple Modes | Heat Pump Heating |
DELLA Econo Series 16500 BTU Mini Split Air Conditioner
This mini split delivers efficient cooling and heating for up to 1000 sq. ft. With a 16500 BTU capacity and a 17 SEER2 rating, it balances strong performance with good energy savings. The system features a ductless inverter plus heat pump design supporting operation at temperatures as low as 14°F.
Smart functions include 4D airflow control (adjusting air up-down and left-right), an “I feel” mode for temperature sensing via remote, and multiple fan speeds allowing customized comfort. The eco mode enhances energy efficiency while turbo mode accelerates cooling or heating.
Installation is simplified with a full 16ft kit included, with standard copper pipe sizes of 1/4″ and 3/8″. The unit is ETL listed and AHRI certified ensuring reliability.
DELLA Motto Series 12000 BTU Wifi Enabled Mini Split
The DELLA Motto Series is crafted for mid-sized rooms, offering cooling and heating for spaces up to 550 sq. ft. Operating at a 20 SEER2 energy efficiency, the 12000 BTU inverter plus system uses a pre-charged heat pump for consistent climate control.
A notable feature is the smart sensor built into the remote control, which measures room temperature for more accurate climate regulation. Standard functions like 4D airflow, “I feel” mode, multiple fan speeds, and timer settings offer versatile and convenient operation.
Included is a 13ft copper line installation kit, accommodating easy setup. Alexa integration and WiFi enablements allow remote control via smartphone or voice commands.
DELLA 18K BTU ODU 2 Dual Zone 9000 9000 BTU Wifi Mini Split
This model features dual zone heating and cooling for two rooms, with two 9000 BTU indoor units controlled independently. Each zone can cover approximately 400 sq. ft, combining for an 800 sq. ft total coverage.
With a 19 SEER2 efficiency, this 208-230V unit uses inverter technology and heat pumps capable of operating in cold temperatures down to -4°F. Though self-cleaning function is not supported, smart features like WiFi and Alexa compatibility provide modern convenience.
The package comes complete with two 16ft copper pipes and installation kits for both zones, addressing needs for multi-room control in homes or offices.
Manastin 12000BTU Mini Split Air Conditioner & Heater
Manastin’s 12000 BTU mini split supports room sizes up to 750 sq. ft with a 17 SEER2 inverter system and R32 refrigerant for energy-efficient operation. Rapid cooling and heating provide user comfort within seconds, suited for medium rooms.
Several modes are available including turbo, eco, sleep, and silent settings with four fan speeds and a 24-hour timer for flexible usage. The complete installation kit is included, simplifying setup for standard pipe dimensions.
Ideal for users seeking a balance between fast performance and environmental responsibility due to low global warming potential refrigerant.
COSTWAY 12000BTU Mini Split Air Conditioner & Heater
The COSTWAY 12000 BTU mini split offers all-year comfort with five operational modes covering cooling, heating, dry, fan, and auto. The 20 SEER2 inverter technology reduces power consumption while maintaining stable temperatures for up to 750 sq. ft rooms.
The included remote control enables easy access to timer, sleep mode, eco mode, and turbo functions. Its low noise operation and automatic display screen dimming enhance user experience during sleep.
This system comes pre-charged and ready to install with a heat pump, suitable for various climates and indoor applications.
Buying Guide: Choosing the Best Mini Split for 900 Sq Ft
Cooling and Heating Capacity (BTU)
Select a mini split with a BTU rating that matches the room size. For around 900 sq. ft, systems between 12000 to 16500 BTU are most appropriate. Undersized units will struggle to cool efficiently while oversized units may cycle frequently wasting energy.
Energy Efficiency (SEER2 Ratings)
Higher SEER2 values indicate better energy efficiency. Look for models above 17 SEER2 to save on utility bills and reduce environmental impact. Inverter technology further improves efficiency by adjusting compressor speed.
Heating Capability
If year-round comfort is desired, choose mini splits equipped with heat pumps. Heat pumps efficiently provide heating in addition to cooling and can operate in low outdoor temperatures.
Smart Features and Control
WiFi enablement and compatibility with Alexa or Google Assistant add convenience of remote operation. Smart sensors or “I feel” modes can optimize temperature regulation for comfort and savings.
Installation and Accessories
Ensure the unit includes a comprehensive installation kit with copper pipe of standard sizes tuned for your intended space. Longer pipe runs or multi-zone capabilities might be necessary depending on room layout.
Noise Levels
Quiet operation is critical for bedrooms or living spaces. Check product specifications or user feedback regarding decibel (dB) levels for indoor units.
Warranty and Certification
ETL and AHRI certifications guarantee quality and performance standards. Good warranty coverage protects your investment long term.
Carefully weighing these factors will help you find the best mini split air conditioner for 900 sq ft that fits your needs, budget, and living environment.