Choosing the right mini split cassette system requires understanding both performance and size. Mini split ceiling cassettes are ideal for efficient heating and cooling in homes and offices, fitting discreetly into suspended ceilings. This guide presents some of the best ceiling cassette mini splits available, focusing on their dimensions alongside their capacity and features to help you pick the perfect unit for your space.
| Product | BTU Capacity | Type | Installation Style |
|---|---|---|---|
| Cooper & Hunter 18,000 BTU Ceiling Cassette | 18,000 | Heat Pump | Ceiling Cassette |
| Gree 30,000 BTU Multi21+ Tri-Zone Ceiling Cassette | 30,000 | Heat Pump | Ceiling Cassette (Tri-Zone) |
| MRCOOL Easy Pro 18,000 BTU Ductless Mini Split | 18,000 | Heat Pump | Indoor Wall or Ceiling |
| Gree 30,000 BTU Multi21+ Dual-Zone Ceiling Cassette | 30,000 | Heat Pump | Ceiling Cassette (Dual-Zone) |
| MrCool Easy Pro 24k BTU 18.9 SEER2 Heat Pump Split | 24,000 | Heat Pump | Indoor Wall or Ceiling |
Content Navigation
- Cooper & Hunter 18,000 BTU Ceiling Cassette Mini Split
- Gree 30,000 BTU Multi21+ Tri-Zone Ceiling Cassette
- MRCOOL Easy Pro 18,000 BTU Ductless Mini Split
- Gree 30,000 BTU Multi21+ Dual-Zone Ceiling Cassette
- MrCool Easy Pro 24k BTU 18.9 SEER2 Heat Pump Mini Split
- Buying Guide For Mini Split Cassette Systems
Cooper & Hunter 18,000 BTU Ceiling Cassette Mini Split

The Cooper & Hunter 18,000 BTU ceiling cassette operates with high efficiency and low noise, perfect for bedrooms and small commercial spaces. It runs on 208-230V power and supports heating in ambient temperatures as low as -13°F. The system includes a 16-foot installation kit with insulated copper line sets and communication wires, making installation easier for HVAC professionals.
This ceiling cassette is designed to fit within standard suspended ceiling grids, with dimensions typically around 24″x24″ panel size. Its compact and whisper-quiet technology provides balanced airflow, making it an excellent choice when space and noise constraints are important.
Gree 30,000 BTU Multi21+ Tri-Zone Ceiling Cassette

The Gree Multi21+ Tri-Zone 30,000 BTU ceiling cassette offers three-zone heating and cooling in one unit. Powered by Gree’s G10 inverter compressor and eco-friendly R410A refrigerant, it provides steady temperature control and energy savings. Installation fits in suspended ceilings with just a subtle decorative grille visible indoors.
The dimensions are designed to accommodate three separate 12,000 BTU zones, making this unit larger than typical single-zone mini splits but ideal for open-floor plans or divided rooms. This model requires separate line sets for each zone and is engineered for quiet operation to avoid indoor disturbance.
MRCOOL Easy Pro 18,000 BTU Ductless Mini Split

The MRCOOL Easy Pro 18,000 BTU unit provides an efficient ductless mini split experience with DIY-friendly installation. It supports smart WiFi control and features a quiet operation ideal for spaces up to 800 sq. ft. While this model typically mounts on walls, its slim profile allows some installation flexibility.
Although not a ceiling cassette design, the compact dimensions and inverter technology make it a worthy option for those prioritizing easy installation and efficient performance in tight spaces.
Gree 30,000 BTU Multi21+ Dual-Zone Ceiling Cassette

This Gree Multi21+ Dual-Zone ceiling cassette activates two zones, each with 12,000 and 18,000 BTU outputs, using the same cutting-edge G10 inverter compressor. It fits discreetly in residential or commercial suspended ceilings, managing dual-zone climate control without bulky distribution boxes.
Its dimensions align with standard ceiling cassette sizes, emphasizing a sleek design that gives greater flexibility for room zoning. Energy efficiency and noise reduction remain key aspects, suitable for quiet office or home environments.
MrCool Easy Pro 24k BTU 18.9 SEER2 Heat Pump Mini Split

The MrCool Easy Pro 24k BTU 18.9 SEER2 system balances powerful heating and cooling for rooms up to 1,200 sq. ft. It is a ductless heat pump with a durable Gold Fin condenser coating, enhancing resistance against corrosion while optimizing heat transfer.
Though primarily a wall or ceiling mounted mini split (not specifically cassette style), this model offers versatile sizing and an advanced efficiency rating. Its 16ft line set facilitates flexible placement within living areas such as sunrooms or garages.
Buying Guide For Mini Split Cassette Systems
When selecting a mini split cassette system, consider these key points to ensure a suitable match for your space and needs:
- Dimensions and Fit: Ceiling cassette units usually fit standard 24″x24″ ceiling grids, but verify exact size to match your existing installation space. Larger multi-zone units may require more ceiling space.
- BTU Capacity: Match BTU output to your room size for efficient heating and cooling. Oversized units waste energy, undersized fail to maintain comfort.
- Zone Control: Multi-zone cassette systems provide control over multiple rooms from one outdoor compressor. Choose dual or tri-zone units based on room layout and zoning requirements.
- Installation Requirements: Some ceiling cassette units include line sets and installation kits; others require separate purchases. Understand electrical needs (208-230V common) and mounting environment.
- Noise Level: Whisper-quiet technologies allow ceiling cassette systems to operate discreetly. Essential in bedrooms, offices, and quiet living spaces.
- Energy Efficiency: Look for inverter-driven compressors and high SEER/HSPF ratings to reduce energy consumption.
- Additional Features: Consider smart WiFi controls, included thermostats, and warranty coverage for long-term convenience and peace of mind.
Evaluating these aspects alongside product dimensions and features ensures you select a mini split cassette system that fits your ceiling space, performance needs, and installation constraints.