Do I need an HVAC license to buy MRCOOL products?

No! MRCOOL DIY systems are designed for homeowners, contractors, and anyone handy with basic tools. You do not need a license to purchase or install most MRCOOL products.

Do you offer free shipping?

Yes. We offer free shipping to the lower 48 states on all full MRCOOL systems and most bundled packages. Smaller items may have calculated rates.

What makes MRCOOL DIY Direct different?

We are the USA’s most trusted independent MRCOOL dealer. We offer expert support, fast shipping, and exclusive early access to new generation systems and accessories.

MRCOOL 5th Gen DIY Multi-Zone Mini Split Systems | 2–6 Zone AC – Page 2

32 products

MRCOOL DIY® 5th Gen 50 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

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MRCOOL DIY® 5th Gen 50 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

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NEW R-454B Refrigerant

Regular price $681.00 USD

Regular price ~~$881.67 USD~~ Sale price $681.00 USD
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MRCOOL DIY® 5th Gen 35 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

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MRCOOL DIY® 5th Gen 35 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

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NEW R-454B Refrigerant

Regular price $582.00 USD

Regular price ~~$753.27 USD~~ Sale price $582.00 USD
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MRCOOL DIY® 5th Gen 25 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set (for 24K & 36K Indoor Units)

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MRCOOL DIY® 5th Gen 25 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set (for 24K & 36K Indoor Units)

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NEW R-454B Refrigerant

Regular price $478.38 USD

Regular price ~~$619.52 USD~~ Sale price $478.38 USD
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MRCOOL DIY® 5th Gen 16 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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MRCOOL DIY® 5th Gen 16 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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NEW R-454B Refrigerant

Regular price $404.24 USD

Regular price ~~$523.22 USD~~ Sale price $404.24 USD
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MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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NEW R-454B Refrigerant

Regular price $679.51 USD

Regular price ~~$879.53 USD~~ Sale price $679.51 USD
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MRCOOL DIY® 5th Gen 35 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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MRCOOL DIY® 5th Gen 35 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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Vendor:
NEW R-454B Refrigerant

Regular price $679.51 USD

Regular price ~~$879.53 USD~~ Sale price $679.51 USD
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MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

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NEW R-454B Refrigerant

Regular price $986.68 USD

Regular price ~~$1,277.57 USD~~ Sale price $986.68 USD
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MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)

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MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)

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NEW R-454B Refrigerant

Regular price $628.32 USD

Regular price ~~$813.19 USD~~ Sale price $628.32 USD
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MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 9K, 12K & 18K Indoor Units)

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MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 9K, 12K & 18K Indoor Units)

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NEW R-454B Refrigerant

Regular price $249.90 USD

Regular price ~~$323.13 USD~~ Sale price $249.90 USD
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MRCOOL 5th Gen Multi-Zone Wall-Mounted Air Handler Builder

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MRCOOL 5th Gen Multi-Zone Wall-Mounted Air Handler Builder

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🚨 This item is currently on Pre-Order. Estimated shipping August 2025.

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NEW R-454B Refrigerant

Regular price $457.00 USD

Regular price ~~$591.70 USD~~ Sale price $457.00 USD
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MRCOOL 5th Gen Multi-Zone Ceiling-Mounted Air Handler Builder

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MRCOOL 5th Gen Multi-Zone Ceiling-Mounted Air Handler Builder

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Estimated shipping August 2025.

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NEW R-454B Refrigerant

Regular price $1,634.00 USD

Regular price ~~$2,115.38 USD~~ Sale price $1,634.00 USD
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MRCOOL 5th Gen Multi Zone Condenser Builder

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MRCOOL 5th Gen Multi Zone Condenser Builder

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NEW R-454B Refrigerant

Regular price $1,555.00 USD

Regular price ~~$2,013.73 USD~~ Sale price $1,555.00 USD
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32 products

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MRCOOL DIY® 5th Gen 50 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 35 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 35 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 25 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 25 ft. 3/8" x 5/8" Pre-Charged Quick Connect Line Set (for 24K & 36K Indoor Units)

MRCOOL DIY® 5th Gen 16 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 16 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 25 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 35 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 35 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 3/8" Pre-Charged Quick Connect Line Set (for 6K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)

MRCOOL DIY® 5th Gen 50 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set with DIY Pro Cable (for 9K, 12K & 18K Indoor Units)

MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 9K, 12K & 18K Indoor Units)

MRCOOL DIY® 5th Gen 16 ft. 1/4" x 1/2" Pre-Charged Quick Connect Line Set (for 9K, 12K & 18K Indoor Units)

MRCOOL 5th Gen Multi-Zone Wall-Mounted Air Handler Builder

MRCOOL 5th Gen Multi-Zone Wall-Mounted Air Handler Builder

MRCOOL 5th Gen Multi-Zone Ceiling-Mounted Air Handler Builder

MRCOOL 5th Gen Multi-Zone Ceiling-Mounted Air Handler Builder

🚨 This item is currently on Pre-Order.

MRCOOL 5th Gen Multi Zone Condenser Builder

MRCOOL 5th Gen Multi Zone Condenser Builder

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