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Choose your system type below to shop the right MRCOOL mini split for your home.

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MRCOOL DIY Mini Split Systems

MRCOOL DIY Mini Split Systems (Heating + Cooling Made Simple)


MRCOOL DIY mini split systems are one of the easiest ways to add efficient heating and air conditioning to your home without the cost and hassle of traditional HVAC installs. Whether you’re upgrading a bedroom, garage, workshop, home office, or an entire home, MRCOOL DIY mini splits give you reliable comfort with modern inverter technology and easy-to-shop system options.

At MRCOOL DIY Direct, we stock and ship a wide range of MRCOOL DIY mini split heat pump systems, including single zone and multi-zone setups, so you can choose the right system for your space, budget, and layout.

Shop MRCOOL DIY Mini Splits by Type

Popular MRCOOL DIY Mini Split Sizes

Choosing the right BTU size is the key to comfort and efficiency. Common system sizes include:
9,000 BTU, 12,000 BTU, 18,000 BTU, 24,000 BTU, and 36,000 BTU.

If you’re not sure what size you need, use our sizing resources and calculators to make the right choice the first time.

What Makes MRCOOL DIY Mini Splits Different?

MRCOOL DIY systems are designed for homeowners who want a high-performance mini split without needing specialized HVAC tools for every step. Depending on the system you choose, benefits may include:

  • High-efficiency inverter performance
  • Quiet operation and reliable comfort
  • Heating + cooling in one system (heat pump)
  • Flexible options for single zone and multi-zone installs
  • DIY-friendly setup with pre-charged line set options

Need Help Choosing the Right System?

If you’re deciding between single zone vs multi-zone, comparing generations, or trying to match the right condenser and air handler sizes, we can help you build the right setup.

Shop with confidence knowing you’ll get fast shipping, real support, and the right parts the first time.

MRCOOL DIY Mini Split FAQ

Do MRCOOL DIY mini splits heat and cool?

Yes. MRCOOL DIY mini split systems are heat pumps, meaning they provide both heating and air conditioning.

What’s the difference between single zone and multi-zone?

Single zone systems run one indoor air handler from one outdoor condenser. Multi-zone systems allow multiple indoor air handlers (zones) to connect to one outdoor condenser for independent room control. Check out the guide here.

What size MRCOOL DIY mini split do I need?

Sizing depends on square footage, insulation, ceiling height, and room use. Common sizes include 9k, 12k, 18k, 24k, and 36k BTU. Use our custom free calculator here.

Do I need a professional HVAC installer?

Many customers install MRCOOL DIY systems themselves, but professional installation is always an option if you prefer.

What’s the difference between R-410A and R-454B systems?

Some MRCOOL generations use different refrigerants. We list compatibility clearly so you can choose the right system for your needs.