4 Best TOSOT 21 SEER2 Mini Splits, Compared

Quick picks

The best fit for you

• You need powerful cooling for a large room TOSOT 33,600 BTU 21 SEER2 Mini Split Its 36,000 BTU capacity handles large spaces efficiently at 21 SEER2.
• You want to cool two rooms independently TOSOT 30k BTU 2-Zone Mini Split This dual-zone unit splits 30,000 BTU into 12k and 18k outputs.
• You prefer smaller units for two rooms TOSOT Cosmo 18K Dual Zone 230V It provides two 9,000 BTU zones for smaller areas with Wi-Fi control.
• You need hidden installation in a large room TOSOT 34,000 BTU Ceiling Cassette The ceiling cassette design hides the unit while delivering 34,000 BTU.

Our 4 picks

1 Best overall

TOSOT 33,600 BTU 21 SEER2 Mini Split

Best for: Large rooms needing powerful, efficient climate control

Efficiency Rating

21 SEER2 (what this guide is about)

Cooling Capacity

33,600 BTU

Voltage

208-230V

Heat Pump

Heating System

Smart Connectivity

Wi-Fi, Voice Control, GREE+ App

Dimensions

39.4 × 29.4 × 16.8 inches

View on Amazon: TOSOT 33,600 BTU 21 SEER2 Mini Split Affiliate link

This TOSOT unit delivers 33,600 BTU of cooling and heating with a 21 SEER2 efficiency rating. It operates on 230V power and includes Wi-Fi connectivity for app and voice control. The system features a 16 ft. copper line set and runs quietly between 22dB and 36dB. It is designed for large spaces requiring robust climate control with smart scheduling capabilities.

Pros

• 21 SEER2 efficiency rating for energy savings
• 33,600 BTU cooling capacity for large areas
• Wi-Fi enabled with GREE+ app and voice control
• Includes 16 ft. copper line set for installation
• Quiet operation from 22dB to 36dB

Cons

• Heavier build at 181 pounds
• Larger indoor unit dimensions at 39.4 inches wide
• Requires professional installation for vacuuming and refrigerant handling

Good fit if

• You need high cooling capacity for a large room
• You want smart scheduling via the GREE+ app
• You have a 230V electrical circuit available

Skip if

• You require a 115V plug-in unit
• You need a compact indoor unit for small spaces
• You prefer a DIY installation without professional help

Verdict: TOSOT 33,600 BTU 21 SEER2 Mini Split is ideal for homeowners with large rooms who need powerful, efficient cooling and heating with smart app control.

2 Also great

TOSOT 30k BTU 2-Zone Mini Split

Best for: Two-room cooling with high efficiency

Efficiency Rating

21 SEER2 (what this guide is about)

Cooling Capacity

30,000 BTU

Voltage

230V

Number of Zones

2 Zone

Heat Pump

Heat Pump

Smart Connectivity

WiFi, Gree+ app, voice control

View on Amazon: TOSOT 30k BTU 2-Zone Mini Split Affiliate link

This dual-zone system pairs a 30,000 BTU outdoor unit with 12,000 and 18,000 BTU indoor heads. It achieves 21 SEER2 efficiency, saving energy compared to standard 16 SEER2 models. You get independent temperature control for each room via the Gree+ app. The outdoor unit handles extreme weather from -22°F to 118°F. It includes a 16.4-foot copper pipe set for installation.

Pros

• 21 SEER2 cooling efficiency rating
• Dual-zone control for two rooms
• Operates in -22°F to 118°F
• Gree+ app and voice control

Cons

• Heavier 263-pound outdoor unit
• Larger 37.9-inch outdoor unit length
• Power cord not included

Good fit if

• You need to cool two separate spaces
• You want high energy efficiency
• You live in extreme temperatures

Skip if

• You only need one room cooled
• You cannot mount a heavy unit
• You prefer a compact outdoor size

Verdict: TOSOT 30k BTU 2-Zone Mini Split fits buyers needing high efficiency for two rooms. Its robust weather range suits extreme climates. The heavy outdoor unit requires a strong mounting surface.

3 Best budget

TOSOT Cosmo 18K Dual Zone 230V

Best for: Two-room cooling with independent settings

Efficiency Rating

21 SEER2 (what this guide is about)

Cooling Capacity

18,000 BTU

Voltage

230V

Number of Zones

Dual 2 Zone

Heat Pump

Heat Pump

Smart Connectivity

Gree+ app, Voice control

View on Amazon: TOSOT Cosmo 18K Dual Zone 230V Affiliate link

This TOSOT unit combines 21 SEER2 efficiency with a dual-zone layout. One 18,000 BTU outdoor compressor drives two 9,000 BTU indoor units. You get individual temperature control for each room via the Gree+ app. It operates from -22℉ to 118℉. The 230V system includes a 16.4-foot pipe set. It suits homes needing flexible cooling for two distinct spaces without ductwork.

Pros

• 21 SEER2 energy efficiency rating
• Dual-zone design with two 9,000 BTU heads
• Gree+ app and voice control support
• Operates in temperatures from -22℉ to 118℉

Cons

• Lower total cooling capacity than larger single-zone units
• Power cord is not included
• Ships in multiple packages requiring coordinated installation

Good fit if

• You need to control temperatures in two separate rooms
• You want high efficiency with 21 SEER2 rating
• You have a 230V electrical outlet available

Skip if

• You only need to cool a single large room
• You require a higher capacity than 18,000 BTU
• You prefer a single-package delivery

Verdict: TOSOT 18k BTU Dual Zone Mini Split is a practical solution for cooling two smaller rooms with independent settings. It fits buyers who value zone flexibility and smart app control over raw cooling power.

4 Best premium

TOSOT 34,000 BTU Ceiling Cassette

Best for: large rooms needing high airflow and hidden installation

Efficiency Rating

21 SEER2 (what this guide is about)

Cooling Capacity

34,000 BTU (3 Ton)

Voltage

230V

Mounting Type

Ceiling Cassette

Dimensions

39.4 × 29.4 × 16.2 inches

Weight

318 pounds

View on Amazon: TOSOT 34,000 BTU Ceiling Cassette Affiliate link

This TOSOT unit is a 34,000 BTU ceiling cassette mini split with 21 SEER2 efficiency. It delivers 1,071 CFM of airflow across four sides with eight-way outlets. The inverter compressor and R32 refrigerant optimize energy use. A built-in pump allows upward pipe routing to save ceiling space. You need a ceiling with adequate load-bearing capacity for this 318-pound installation.

Pros

• 21 SEER2 efficiency rating with inverter compressor
• 34,000 BTU cooling capacity for large spaces
• 1,071 CFM airflow with eight-way distribution
• Built-in condensate pump for flexible piping

Cons

• Heavy 318-pound unit requires strong ceiling support
• Ships in multiple packages requiring full assembly
• Professional installation is mandatory for safety

Good fit if

• You need discreet ceiling-mounted cooling for a large room
• You want even 360-degree airflow distribution
• You have a ceiling capable of supporting 318 pounds

Skip if

• You cannot install a unit in the ceiling
• You need a lightweight DIY-friendly setup
• You require a smaller 18,000 BTU capacity

Verdict: TOSOT 34,000 BTU Ceiling Cassette Mini Split suits large rooms where you need high airflow and hidden installation. It fits spaces with strong ceilings that can hold its 318-pound weight.

Specifications side by side

How to choose the right mini split

1. Check your electrical voltage

   All TOSOT models in this guide operate on 230V power. You must ensure your home has a dedicated 230V circuit before purchasing. Standard household outlets provide 110V, which is insufficient for these units. Installing a 230V line requires professional electrical work. Verify your panel capacity and wiring compatibility. Using the wrong voltage will prevent the unit from functioning and may damage the compressor. This spec is non-negotiable for all listed products, including the single-zone and dual-zone options.

2. Match BTU to room size

   Select capacity based on your square footage and insulation. The 33,600 BTU model suits large rooms needing powerful climate control. Smaller spaces may require the 18,000 BTU dual-zone units, which provide 9,000 BTU per zone. Oversized units short-cycle, reducing efficiency and comfort. Undersized units run continuously without reaching the target temperature. Check the room dimensions and heat sources. Match the BTU rating to the specific cooling load. This ensures stable temperatures and optimal energy use throughout the day.

3. Decide on zone count

   Choose single-zone or dual-zone based on how many rooms you need to cool. Single-zone units like the 33,600 BTU model serve one space. Dual-zone models, such as the 30k BTU and 18k Cosmo, split capacity across two rooms. This allows independent temperature settings for each area. You pay for the outdoor unit capacity, not just the indoor heads. Dual-zone setups offer flexibility for living areas and bedrooms. Select the zone count that matches your layout and usage patterns.

4. Consider mounting type

   Standard mini splits mount on walls. The ceiling cassette option offers a hidden installation for large rooms. This model requires strong ceilings to support its 318-pound weight. Wall mounts are lighter and easier to install. The cassette provides high airflow and blends with decor. Check your wall structure or ceiling integrity. Ensure you have the space for the chosen mounting style. The cassette is ideal for commercial or high-end residential spaces where visibility matters.

5. Verify smart control needs

   Wi-Fi smart control allows remote operation via an app. Models like the 33,600 BTU and 18k Cosmo include this feature. You can adjust temperatures and schedules from your phone. This adds convenience but requires a stable home network. Not all units may have this if specs change. Check the attributes for Wi-Fi support. Smart features do not affect cooling performance. They enhance usability. Ensure your router covers the installation area for reliable connectivity.

Frequently asked questions

See also

• best TOSOT mini splits under 1500
• best TOSOT mini splits under 2000
• best 17 SEER2 mini split air conditioners
• mysa smart thermostat mini split heat review