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- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
- You'll need about 20-30 cooling Btu's for most climates depending on construction type and insulation values.
- 4 zone mini split -This system will independently condition 4 separate rooms/zones to the individual temperatures you choose for each zone
MrCool DIY 5th Gen 4 Zone 27000 BTU Mini Split Heat Pump System - Choose Your Indoor Units - R454B
- Outdoor Unit: DIY-MULTI4-27HP230D-O
- Number Of Indoor Units: 4
- Includes Wireless Remote Controller For Each Indoor Unit
Mini Split Sizing BTU Calculator
Use this Free & Easy Mini Split BTU Calculator to Select the Right Size Mini Split AC or Heat Pump for your Home.
When using a mini split sizing calculator for rooms below a conditioned space, apply an additional .7 factor to your final Btu outcome.
For example, if your Btu requirement via this calculator is 18,000 Btu's: 18,000 Btu's x .7 factor = 12,600 Btu's required. When in doubt, it is okay to go up a size or two. Unlike standard non-variable systems, The mini split inverter technology allows the system to adjust to the actual room requirements in both heating and cooling.
- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
- You'll need about 20-30 cooling Btu's for most climates depending on construction type and insulation values.
- 4 zone mini split -This system will independently condition 4 separate rooms/zones to the individual temperatures you choose for each zone
As low as $5,684.00
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This system includes one fully charged MrCool DIY 5th Gen multizone mini split heat pump condensing unit for to 27000 BTUs and up to 4 indoor units. This system requires a minimum of 2 indoor units to function. We do not recommend combining units with combined BTUs over the maximum limit of 33000 BTUs.
MrCool DIY 5th Gen 4 Zone 27000 BTU Mini Split Heat Pump Condenser - 230V, R454B
Model Number
DIY-MULTI4-27HP230D-O
Dimensions
37.24" W x 16.14" D x 31.89" H
Documents
DIY-MULTI4-27HP230D-O Specifications
Warranty
Parts: 5 years | Compressor: 7 years
Wall Mount Indoor Units
One Way Ceiling Cassette Indoor Units
AHRI Number
Ducted: 216032590
Non-Ducted: 216032589
Mixed: 216032591
SEER2
Ducted: 20
Non-Ducted: 23
Mixed: 21.5
MRCOOL DIY® 27,000 BTU 4-Zone Ductless Heat Pump Condenser – Model DIY-MULTI4-27HP230D-O | 230V
Flexible comfort for up to four rooms with easy DIY installation
The MRCOOL DIY® Multi4 27,000 BTU Multi-Zone Condenser offers reliable heating and cooling for up to four indoor zones, making it ideal for mid-sized homes and small commercial spaces. Built with MRCOOL’s innovative Quick Connect fittings, installation requires no vacuum pump or special tools—simply connect the pre-charged line sets and you’re ready to go.
With inverter compressor technology, smart home compatibility, and whisper-quiet operation, the DIY-MULTI4-27HP230D-O ensures year-round comfort and energy efficiency in every room.
Features & Benefits
- 27,000 BTU heating and cooling capacity
- Supports up to four indoor air handlers
- 230V, 3-zone and 4-zone compatible configuration
- Wi-Fi control through the MRCOOL SmartHVAC app
- Inverter-driven compressor for efficient, stable operation
- DIY installation using pre-charged Quick Connect line sets
MRCOOL DIY® Wall Mounted Air Handlers
Easy-to-install comfort for every room with MRCOOL’s DIY® mini-split technology
The MRCOOL DIY® Wall Mounted Air Handlers deliver exceptional comfort, energy efficiency, and convenience for homes and businesses alike. Available in sizes from 6,000 BTU to 36,000 BTU, these wall-mounted indoor units are designed for use with MRCOOL’s innovative DIY® Ductless Mini-Split Heat Pump Systems. Each air handler offers quiet operation, advanced control options, and easy, no-vacuum installation with the MRCOOL® pre-charged line sets.
Built for DIY installers and professionals alike, these units feature variable-speed inverter technology for precise temperature control, built-in Wi-Fi for smart home integration, and a sleek, modern design that fits comfortably in any space. The washable filters, auto-restart function, and multiple fan modes make maintenance simple while maximizing year-round comfort.
Features & Benefits
- Available in 6,000 to 36,000 BTU capacities to fit rooms of any size
- Designed exclusively for MRCOOL DIY® Ductless Mini-Split Heat Pump Systems
- Easy wall-mounted installation – no vacuum pump or special tools required
- Built-in Wi-Fi for smart home control via the MRCOOL SmartHVAC app, Alexa®, and Google Assistant®
- Variable-speed inverter technology ensures energy-efficient performance
- Quiet operation for enhanced comfort in bedrooms, offices, and living areas
- Washable, reusable filters reduce maintenance costs
- Auto restart and sleep mode for convenience and energy savings
- Factory-approved components for reliability and long service life
MRCOOL DIY® Ceiling Cassette Air Handlers Multi-Zone Ductless Mini-Split Systems
Discreet, powerful comfort for every room — easy to install and built to last
The MRCOOL DIY® Ceiling Cassette Air Handler Series offers premium, built-in comfort for homes and businesses without the need for complicated installation. Designed exclusively for use with MRCOOL DIY® Multi-Zone Ductless Mini-Split Heat Pump Systems, these ceiling-mounted units combine sleek design, whisper-quiet operation, and the industry’s easiest setup — all while delivering powerful heating and cooling performance.
Available in 6,000 BTU, 9,000 BTU, 12,000 BTU, and 18,000 BTU capacities, MRCOOL DIY® Ceiling Cassettes provide flexible, zoned comfort for spaces ranging from small bedrooms to large open living areas. Each model installs seamlessly between standard ceiling joists, maintaining a clean, low-profile appearance that blends into any room design. With built-in Wi-Fi connectivity, users can control temperature settings through the MRCOOL SmartHVAC app, or hands-free via Alexa® and Google Assistant®.
Engineered with inverter-driven technology and four-way directional airflow, these ceiling cassette air handlers distribute air evenly and efficiently across your space. The result is customized comfort, energy savings, and professional-quality performance — all achievable without professional installation costs.
Features & Benefits
- Available in 6,000 – 18,000 BTU models for rooms up to 750 sq. ft.
- Compatible with MRCOOL DIY® Multi-Zone Mini-Split Heat Pump Systems
- Ceiling-mounted design installs between standard joists for a sleek, flush appearance
- Four-way directional airflow ensures consistent comfort throughout the room
- Built-in Wi-Fi control via the MRCOOL SmartHVAC app, Alexa®, and Google Assistant®
- Inverter technology delivers quiet, energy-efficient performance
- Simple DIY installation — no vacuum pump or special tools required
- Ideal for residential or light commercial applications
- Factory-backed reliability from MRCOOL, a trusted name in home comfort innovation
Who installs the AC unit after I purchase it?
ACDirect does not yet provide installation services directly. However, most of our customers successfully arrange installation through local licensed HVAC contractors. These systems are designed for professional installation and typically include the components your installer will need.
Here’s how it works:
- Hire a licensed HVAC technician in your area
- Use platforms like Angi, Thumbtack, or a local HVAC directory to find reliable professionals
- Confirm your installer is experienced with the system type you’re purchasing
Note:
Please be aware if you choose to install HVAC equipment yourself and don’t possess proper HVAC licensing, you will void the manufacturer’s factory warranty. If you are capable of a factory-compliant installation yourself, you will need a licensed HVAC contractor to sign off on your work, fully confirming factory-compliant workmanship.
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