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Vendor:
MRCOOL
MRCOOL Universal Series 30,000 BTU (2.5 Ton) Multi-Position Air Handler & Heat Pump Inverter Split System - R-454B Refrigerant, UHP1830AH1830-O

Regular price $4,010.00

Sale price $4,010.00 Regular price ~~$4,400.00~~ Save $390

In Stock Delivers Nov 16-23 (Est.)
SALE

Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 45,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+36K), DIYM255HP

Regular price $6,120.00

Sale price $6,120.00 Regular price ~~$6,977.30~~ Save $857

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 27,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+9K+9K), DIYM327HP

Regular price $4,377.00

Sale price $4,377.00 Regular price ~~$4,936.80~~ Save $560

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+12K), DIYM227HP

Regular price $3,775.00

Sale price $3,775.00 Regular price ~~$4,233.90~~ Save $459

In Stock Delivers Nov 16-23 (Est.)
SALE

Vendor:
MRCOOL
MRCOOL DIY® Select 9,000 BTU Single Zone Mini Split System 115V with Black Air Handler and 11.5 ft. DIY Quick Connect Line Set, DIYS-09-HP-B-115A11-O

Regular price $1,249.00

Sale price $1,249.00 Regular price ~~$1,599.00~~ Save $350

Backorder Restock: Early December (Est.)
BEST SELLERSALE

Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 30,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (12K+18K), DIYM236HP

Regular price $4,629.00

Sale price $4,629.00 Regular price ~~$5,128.20~~ Save $499

In Stock Delivers Nov 16-23 (Est.)
BEST SELLERSALE

Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 36,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (12K+24K), DIYM236HP

Regular price $4,695.00

Sale price $4,695.00 Regular price ~~$5,369.10~~ Save $674

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 12K with 25 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM227HPC04D08

Regular price $5,793.00

Sale price $5,793.00 Regular price ~~$6,662.00~~ Save $869

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 12K with 16 ft. / 12K with 25 ft. Pre-Charged Line Sets | DIYM227HPC04D01

Regular price $5,433.00

Sale price $5,433.00 Regular price ~~$6,791.00~~ Save $1,358

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 6K with 35 ft. / 6K with 50 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM327HPC02D39

Regular price $7,821.00

Sale price $7,821.00 Regular price ~~$8,603.00~~ Save $782

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 6K with 35 ft. / 12K with 35 ft. Pre-Charged Line Sets | DIYM327HPC02D11

Regular price $7,376.00

Sale price $7,376.00 Regular price ~~$8,482.00~~ Save $1,106

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 30,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 16 ft. / 9K with 25 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM336HPW09D08

Regular price $5,374.00

Sale price $5,374.00 Regular price ~~$6,718.00~~ Save $1,344

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM218HPW02D03

Regular price $3,515.00

Sale price $3,515.00 Regular price ~~$4,394.00~~ Save $879

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 27,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 9K with 50 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM327HPW04D15

Regular price $5,179.00

Sale price $5,179.00 Regular price ~~$6,474.00~~ Save $1,295

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 12K with 35 ft. Pre-Charged Line Sets | DIYM218HPW02D02

Regular price $3,430.00

Sale price $3,430.00 Regular price ~~$3,944.00~~ Save $514

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 27,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 9K with 16 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM327HPW04D03

Regular price $4,819.00

Sale price $4,819.00 Regular price ~~$5,301.00~~ Save $482

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 36,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 25 ft. / 9K with 25 ft. / 18K with 16 ft. Pre-Charged Line Sets | DIYM336HPW10D36

Regular price $5,305.00

Sale price $5,305.00 Regular price ~~$6,101.00~~ Save $796

In Stock Delivers Nov 16-23 (Est.)
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Vendor:
MRCOOL
MRCOOL DIY 5th Gen 3-Zone 36,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 35 ft. / 9K with 50 ft. / 18K with 35 ft. Pre-Charged Line Sets | DIYM336HPW10D74

Regular price $6,137.00

Sale price $6,137.00 Regular price ~~$7,978.00~~ Save $1,841

In Stock Delivers Nov 16-23 (Est.)
BEST SELLERSALE

Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 16 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM227HPW02D03

Regular price $4,135.00

Sale price $4,135.00 Regular price ~~$4,548.00~~ Save $413

In Stock Delivers Nov 16-23 (Est.)
BEST SELLERSALE

Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 16 ft. / 12K with 35 ft. Pre-Charged Line Sets | DIYM227HPW02D02

Regular price $4,050.00

Sale price $4,050.00 Regular price ~~$5,062.00~~ Save $1,012

In Stock Delivers Nov 16-23 (Est.)
BEST SELLERSALE

Vendor:
MRCOOL
MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 25 ft. / 9K with 50 ft. Pre-Charged Line Sets | DIYM218HPW03D08

Regular price $3,470.00

Sale price $3,470.00 Regular price ~~$4,338.00~~ Save $868

In Stock Delivers Nov 16-23 (Est.)

BTU Coverage Guide

6,000 BTU

100-150 sq ft

9,000 BTU

151-350 sq ft

12,000 BTU

351-500 sq ft

18,000 BTU

501-750 sq ft

24,000 BTU

751-1,000 sq ft

36,000 BTU

1,001-1,500 sq ft

Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.

Frequently Asked Questions

What's the difference between the 5th Gen and 4th Gen?

The 5th Gen MRCOOL DIY® Mini Split offers several key upgrades over the 4th Gen, focusing on efficiency, advanced technology, and eco-friendliness.

Here’s what’s new with the 5th Gen:

Next-Gen R-454B Refrigerant: A more environmentally friendly refrigerant with lower global warming potential (GWP), compliant with the latest HVAC regulations.
Higher Energy Efficiency: Improved SEER2 ratings for greater energy savings and optimized performance.
Enhanced System Reliability: Upgraded components for better heating and cooling performance.

For a full breakdown, check out our blog.

Can I install it myself, or do I need a professional?

The MRCOOL DIY system is designed for homeowners and doesn’t require HVAC tools. You can install the indoor and outdoor units yourself using the pre-charged Quick Connect® lines. However, a licensed electrician is required for the electrical hookup to ensure safety and code compliance.

Does it work in cold weather?

Yes. MRCOOL 5th Gen systems feature low-ambient heating and can provide reliable heat even when outdoor temperatures drop to around 5°F.

How do I know what BTU size I need for my rooms?

A general rule of thumb is 20 BTU per square foot of space. Here's a rough guide:

6,000 BTU = 100 - 150 sq ft
9,000 BTU = 150 - 350 sq ft
12,000 BTU = 351- 500 sq ft
18,000 BTU = 501 – 750 sq ft
24,000 BTU = 751 – 1,000 sq ft
36,000 BTU = 1,001 - 1,500 sq ft

Some additional factors may impact performance such as insulation, ceiling height, sun exposure and the number of appliances in the room. For assistance, contact our Product Experts.

Does it heat as well as cool?

Yes. All 5th Gen models are heat pumps, providing both heating or cooling for year-round comfort.

Is it Wi-Fi compatible?

Yes. The MRCOOL SmartHVAC app allows smartphone control and works with Amazon Alexa and Google Assistant.

What is the warranty?

The MRCOOL 5th Generation DIY Mini-Split systems offer the following warranty coverage:

7-Year Compressor Replacement Warranty: This warranty ensures that if the compressor fails within the first seven years, MRCOOL will provide a replacement.
5-Year Parts Warranty: This warranty covers all parts of the system for five years from the date of purchase.

View Warranty Document here.

MRCOOL Mini Split Guides

Things I wish I knew before purchasing a MRCOOL Mini Split

Official MRCOOL Store

Shop MRCOOL DIY Mini Splits

MRCOOL Universal Series 30,000 BTU (2.5 Ton) Multi-Position Air Handler & Heat Pump Inverter Split System - R-454B Refrigerant, UHP1830AH1830-O

MRCOOL DIY 5th Gen 2-Zone 45,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+36K), DIYM255HP

MRCOOL DIY 5th Gen 3-Zone 27,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+9K+9K), DIYM327HP

MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (9K+12K), DIYM227HP

MRCOOL DIY® Select 9,000 BTU Single Zone Mini Split System 115V with Black Air Handler and 11.5 ft. DIY Quick Connect Line Set, DIYS-09-HP-B-115A11-O

MRCOOL DIY 5th Gen 2-Zone 30,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (12K+18K), DIYM236HP

MRCOOL DIY 5th Gen 2-Zone 36,000 BTU Ductless Mini Split Air Conditioner & Heat Pump with Pre-Charged Line Sets (12K+24K), DIYM236HP

MRCOOL DIY 5th Gen 2-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 12K with 25 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM227HPC04D08

MRCOOL DIY 5th Gen 2-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 12K with 16 ft. / 12K with 25 ft. Pre-Charged Line Sets | DIYM227HPC04D01

MRCOOL DIY 5th Gen 3-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 6K with 35 ft. / 6K with 50 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM327HPC02D39

MRCOOL DIY 5th Gen 3-Zone 24,000 BTU Ceiling Cassette Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 6K with 35 ft. / 12K with 35 ft. Pre-Charged Line Sets | DIYM327HPC02D11

MRCOOL DIY 5th Gen 3-Zone 30,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 16 ft. / 9K with 25 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM336HPW09D08

MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM218HPW02D03

MRCOOL DIY 5th Gen 3-Zone 27,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 9K with 50 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM327HPW04D15

MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 12K with 35 ft. Pre-Charged Line Sets | DIYM218HPW02D02

MRCOOL DIY 5th Gen 3-Zone 27,000 BTU Mini Split Air Conditioner & Heat Pump 6K with 16 ft. / 9K with 16 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM327HPW04D03

MRCOOL DIY 5th Gen 3-Zone 36,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 25 ft. / 9K with 25 ft. / 18K with 16 ft. Pre-Charged Line Sets | DIYM336HPW10D36

MRCOOL DIY 5th Gen 3-Zone 36,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 35 ft. / 9K with 50 ft. / 18K with 35 ft. Pre-Charged Line Sets | DIYM336HPW10D74

MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 16 ft. / 12K with 50 ft. Pre-Charged Line Sets | DIYM227HPW02D03

MRCOOL DIY 5th Gen 2-Zone 21,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 16 ft. / 12K with 35 ft. Pre-Charged Line Sets | DIYM227HPW02D02

MRCOOL DIY 5th Gen 2-Zone 18,000 BTU Mini Split Air Conditioner & Heat Pump 9K with 25 ft. / 9K with 50 ft. Pre-Charged Line Sets | DIYM218HPW03D08

BTU Coverage Guide