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DIY 5th Gen Systems

The MRCOOL® DIY® 5th Generation mini-split is the only ductless heat pump system on the market designed for true do-it-yourself installation — no HVAC license, no vacuum pump, and no special tools required. The patented Quick Connect® line set arrives pre-charged with next-generation R-454B refrigerant, meaning you simply connect the line set and power on. Installation typically takes a few hours rather than a full day.

This collection includes everything you need for a complete single-zone DIY system: condensers (outdoor units), wall mount air handlers (indoor units), complete system bundles, and compatible R-454B line sets in multiple lengths.

Available Configurations

BTU Voltage SEER2 HSPF2-4 Coverage
9,000 115V 23.6 11.5 Up to 350 sq. ft.
12,000 115V 23.5 10.2 350–550 sq. ft.
18,000 208/230V 22.5 11.5 500–750 sq. ft.
24,000 208/230V 22.7 9.5 750–1,050 sq. ft.
36,000 208/230V 18.0 8.5 1,000–1,500 sq. ft.

What’s in This Collection

  • Condensers — Outdoor units sold separately for pairing with any compatible air handler
  • Air Handlers — Wall mount indoor units in 115V and 208/230V configurations
  • Complete Bundles — Condenser + air handler + 25ft pre-charged Quick Connect® line set
  • Line Sets — R-454B line sets in 16ft, 25ft, 35ft, and 50ft lengths with optional DIYPro® cable

Filters

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MRCOOL DIY 5th Gen 12k 230V Air Handler
$826.80 - $826.80
$826.80
$826.80 - $826.80
$826.80

MRCOOL DIY 5th Gen 12K BTU 230V Air Handler DIY-12-HP-WMAH-230D25-O

MRCOOL

The 5th Generation MRCOOL® DIY® 12k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler is the ideal comfort solution for spaces up to 550 sq...

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$826.80 - $826.80
$826.80
$826.80 - $826.80
$826.80
MRCOOL DIY Air Handler
MRCOOL DIY 5th Gen 12k 115V Air Handler
$768.00 - $768.00
$768.00
$768.00 - $768.00
$768.00

MRCOOL DIY 5th Gen 12K BTU 115V Air Handler DIY-12-HP-WMAH-115D25-O

MRCOOL

Transform your space with the 5th Generation MRCOOL® DIY® 12k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler—engineered for easy, tool-f...

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$768.00 - $768.00
$768.00
$768.00 - $768.00
$768.00
MRCOOL DIY 5th Gen 12k 115V Air Handler included in bundle
MRCOOL DIY 5th Gen 12k Bundle
$2,830.80 - $2,830.80
$2,830.80
$2,830.80 - $2,830.80
$2,830.80

MRCOOL DIY 5th Gen 1 Ton 12K BTU 23.5 SEER2 R-454B Complete Bundle Wall Mount Mini-Split 115V DIY-12-HP-WM-115D25-O

MRCOOL

The MRCOOL® DIY® 5th Generation 12K BTU 23.5 SEER2 R-454B Complete Bundle includes everything needed for a complete single-zone ductless mini-split...

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$2,830.80 - $2,830.80
$2,830.80
$2,830.80 - $2,830.80
$2,830.80
MRCOOL DIY 5th Gen 12K BTU 115V Mini-Split Condenser DIY-12-HP-C-115D25-O
$1,591.00 - $1,591.00
$1,591.00
$1,591.00 - $1,591.00
$1,591.00

MRCOOL DIY 5th Gen 12K BTU 115V Mini-Split Condenser DIY-12-HP-C-115D25-O

MRCOOL

Installing your own HVAC system might sound overwhelming, but the 5th Generation MRCOOL® DIY® 12k BTU 23.5 SEER Ductless Heat Pump Single Zone Mini...

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$1,591.00 - $1,591.00
$1,591.00
$1,591.00 - $1,591.00
$1,591.00
MRCOOL DIY Air Handler
MRCOOL DIY 5th Gen 9k 230V Air Handler
$638.40 - $638.40
$638.40
$638.40 - $638.40
$638.40

MRCOOL DIY 5th Gen 9K BTU 230V Air Handler DIY-09-HP-WMAH-230D25-O

MRCOOL

The 5th Generation MRCOOL® DIY® 9k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler offers efficient, flexible comfort for spaces up to 40...

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$638.40 - $638.40
$638.40
$638.40 - $638.40
$638.40
MRCOOL DIY Air Handler side
MRCOOL DIY 5th Gen Air Handler
$745.00 - $745.00
$745.00
$745.00 - $745.00
$745.00

MRCOOL DIY 5th Gen 9K BTU 115V Air Handler DIY-09-HP-WMAH-115D25-O

MRCOOL

Check out the new 5th Generation MRCOOL® DIY® 9k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler. Designed for an easy and hassle-free in...

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$745.00 - $745.00
$745.00
$745.00 - $745.00
$745.00
MRCOOL DIY 5th Gen Air Handler
MRCOOL DIY 5th Gen 9k Bundle
$2,794.80 - $2,794.80
$2,794.80
$2,794.80 - $2,794.80
$2,794.80

MRCOOL DIY 5th Gen 0.75 Ton 9K BTU 23.6 SEER2 R-454B Complete Bundle Wall Mount Mini-Split 115V DIY-09-HP-WM-115D25-O

MRCOOL

The MRCOOL® DIY® 5th Generation 9K BTU 23.6 SEER2 R-454B Complete Bundle includes everything needed for a complete single-zone ductless mini-split ...

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$2,794.80 - $2,794.80
$2,794.80
$2,794.80 - $2,794.80
$2,794.80
MRCOOL DIY 5th Gen 9K BTU 115V Mini-Split Condenser DIY-09-HP-C-115D25-O
$1,584.00 - $1,584.00
$1,584.00
$1,584.00 - $1,584.00
$1,584.00

MRCOOL DIY 5th Gen 9K BTU 115V Mini-Split Condenser DIY-09-HP-C-115D25-O

MRCOOL

Installing an HVAC system yourself might seem impossible, but the 5th Generation MRCOOL® DIY® 9k BTU 23.6 SEER Ductless Heat Pump Single Zone Mini-...

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$1,584.00 - $1,584.00
$1,584.00
$1,584.00 - $1,584.00
$1,584.00
MRCOOL DIY 5th Gen Air Handler side view
MRCOOL DIY 5th Gen 6k BTU 230V Air Handler
$525.98 - $525.98
$525.98
$525.98 - $525.98
$525.98

MRCOOL DIY 5th Gen 6K BTU 230V Mini-Split Air Handler DIY-06-HP-WMAH-230D25-O

MRCOOL

Discover the 5th Generation MRCOOL® DIY® 6k BTU Ductless Heat Pump Single Zone Mini-Split Air Handler — an efficient, compact solution designed to ...

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$525.98 - $525.98
$525.98
$525.98 - $525.98
$525.98