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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

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MRCOOL LineGuard 4.5in 16-Piece Line Set Cover Kit White | MLG450
MRCOOL LineGuard 4.5in 16-Piece Line Set Cover Kit White | MLG450
$151.98 - $152.98
$151.98 - $152.98
$151.98 - $152.98
$151.98

MRCOOL LineGuard 4.5in 16-Piece Line Set Cover Kit

MRCOOL

The MRCOOL® LineGuard Line Set Cover (MLG450) is a protective exterior line set cover designed for use with MRCOOL® ductless mini-split systems. Th...

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$151.98 - $152.98
$151.98 - $152.98
$151.98 - $152.98
$151.98