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DIY Mini Split Heat Pumps You Can Install Yourself

Save thousands on installation with DIY-ready mini split heat pumps shipped to your door, with expert support included.

Fast shipping. Real support. DIY-friendly systems that actually work.

Lower 48 states
Pre-charged line sets
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DIY Friendly • Pre-Charged Line Sets mrcool DIY mini split heat pump installed in a modern home

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BUILT FOR LICENSED HVAC PROFESSIONALS

MRCOOL® Olympus Series – Professional Installation Systems

Designed for contractors, builders, and HVAC professionals, the MRCOOL® Olympus Series delivers pro-grade ductless and ducted systems intended for traditional licensed installation. These systems are built for performance, reliability, and jobsite efficiency, not DIY installs.

  • Contractor-grade MRCOOL® ductless and ducted systems
  • Ideal for new construction, replacements, and client projects
  • Professional installation only. Not DIY equipment.
View Olympus Contractor Systems

Built for licensed HVAC professionals and contractor-installed projects.

Frequently Asked Questions

What makes these MRCOOL systems truly DIY-friendly?

The featured MRCOOL mini split and central ducted systems use pre-charged components that simplify installation.

DIY Series E-Star & EZPRO ductless systems include pre-charged Quick Connect line sets and SmartHVAC WiFi control, while the central ducted tiers use pre-charged condensers and line sets.

Combined with expert support and fast, free shipping on complete systems from a trusted U.S. dealer, confident homeowners can take on installs themselves or involve a licensed HVAC professional.

What are the key highlights of the 5th Gen DIY mini split lineup?

Three standouts are featured. MRCOOL E-Star & EZPRO single-zone ductless systems are built for DIY install and include Quick Connect line sets and WiFi.

The DIY Hyper Heat Single Zone models deliver reliable heating down to -22°F, run on 230V, come in 12K or 18K BTU, and offer wall-mounted or ceiling cassette air handlers.

The ENERGY STAR E-Star Series combines inverter technology with R-454B refrigerant for rebate-eligible, high-efficiency performance.

How are the central ducted systems organized, and what capacities are available?

They’re offered in Good/Better/Best tiers: VersaPro (Good), HyperHeat (Better), and Universal (Best).

All use pre-charged condensers/line sets and are available from 1.5 to 5 tons, covering a wide range of whole-home needs.

The listings show VersaPro models from 1.5–5 tons with SEER2 ratings up to 18.8, and HyperHeat models from 2–5 tons with SEER2 ratings up to 18.3. Universal systems are available in 2–5 tons.

Are any of these systems ENERGY STAR certified or rebate-eligible?

Yes!

The 5th Gen E-Star Series is ENERGY STAR rated and pairs inverter technology with R-454B refrigerant to deliver rebate-eligible efficiency and lower operating costs, while maintaining reliable year-round comfort.

What shipping and support can I expect when ordering?

Complete MRCOOL systems ship free, with fast delivery and expert support included.

You’re buying from a trusted U.S. MRCOOL dealer, ensuring guidance from selection through installation for DIYers and pros alike.

Why buy MRCOOL from MRCOOL DIY Direct instead of a big box store or marketplace seller?

Experience, scale, and real HVAC expertise matter.

MRCOOL products are available through large retailers and online marketplaces, but not all sellers offer the same level of knowledge or support. MRCOOL DIY Direct is one of the nation’s largest MRCOOL retailers and operates as a division of a local HVAC business with years of hands-on industry experience.

Unlike big box stores or third-party marketplace sellers, we work daily with leading HVAC brands such as Daikin, Goodman, Amana, and GWIN, and we understand system sizing, electrical requirements, refrigerant types (R-410A vs. R32 vs. R-454B), ducted versus ductless design, and real-world installation considerations.

We’ve partnered with MRCOOL for years because we believe in the value of properly engineered DIY-friendly systems when matched to the right application. Our team provides guidance before, during, and after your purchase—whether you’re a confident DIY homeowner or working alongside a licensed HVAC professional.

We always encourage customers to shop around and compare, but it’s important to understand the difference between a marketplace listing and a dedicated HVAC dealer. When you purchase from MRCOOL DIY Direct, you’re working with HVAC professionals who understand the equipment, not just a retailer processing orders. That expertise is why customers across the U.S. trust MRCOOL DIY Direct as a leading source for MRCOOL HVAC systems and support.