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Mini Splits
RecommendedRecommended for multi-zoneBUILD A DIY MULTI-ZONE SYSTEMConfigure zones, indoor units, capacities, and line-set lengths.START BUILDING →

Installation pathDesigned for DIY InstallationHomeowner-oriented systems with factory-precharged connection options.Shop DIY systems →Installation pathProfessional InstallationCompare Olympus and Advantage systems intended for traditional HVAC installation.Compare systems → Planning a complete system?Financing AvailableExplore payment options for a complete multi-zone purchase.View financing →
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Before you chooseInstallation Varies by ConfigurationSome eligible split systems offer precharged options; packaged, furnace, and traditional configurations follow professional-installation paths.Get selection help → Planning a whole-home purchase?Financing AvailableReview payment options for larger equipment purchases.Explore financing →
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RecommendedPrimary configuration toolBuild a DIY Multi-Zone SystemBuild a matched MRCOOL DIY multi-zone system from zones through line-set lengths.Start building →
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Sizing toolsFind the right sizeUse the BTU calculator or Manual J tools before choosing equipment.Start sizing → After you planExplore Payment OptionsAfter configuring and sizing your project, review available financing options.View financing →
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What are you shopping for?

RecommendedRecommended for multi-zoneBUILD A DIY MULTI-ZONE SYSTEMChoose your zones, indoor units, capacities, and line-set lengths for a matched MRCOOL DIY multi-zone system.START BUILDING →

Installation pathDesigned for DIY InstallationExplore homeowner-oriented mini splits with factory-precharged connection options.Shop DIY systems →Installation pathProfessional InstallationCompare Olympus and Advantage systems intended for traditional HVAC installation.Compare systems → Planning a complete system?Financing AvailableExplore payment options for a complete multi-zone purchase.View financing →
Not sure what size?Plan before you buyUse the BTU calculator as a starting point for system sizing.Open BTU calculator →
DIY hybrid configurationPlan a DIY Hybrid SystemCombine a central ducted air handler with supported wall or cassette zones on a DIY multi-zone condenser.Open Hybrid Builder →

Before you chooseInstallation Varies by ConfigurationSome eligible split systems offer precharged connection options. Packaged, furnace, and traditional configurations follow professional-installation paths.Get selection help → Planning a whole-home purchase?Financing AvailableReview payment options for larger equipment purchases.Explore financing →
Sizing & planningManual J Load CalculatorEstimate heating and cooling loads before selecting equipment.Open Manual J →
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  Shop All Replacement Parts
  Control Boards
  Fan Motors
- Installation & Accessories
  Line Sets
  Installation Kits
  Couplers, Wire & Adapters
  Condenser Mounting
  Tools & Gauges
Replacement partsStart with your model numberShop genuine MRCOOL replacement parts. Confirm equipment details before ordering.Shop replacement parts →

Installation & accessoriesInstallation essentialsLine sets, mounting, kits, controls, and installation accessories.Shop accessories →
- System Builders
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- Sizing Tools
  Mini-Split BTU Calculator
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  HVAC Replacement & Sizing Guide
RecommendedPrimary configuration toolBuild a DIY Multi-Zone SystemBuild a matched MRCOOL DIY multi-zone system from zones through line-set lengths.Start building →

Sizing toolsFind the right sizeUse the BTU calculator or Manual J tools before choosing equipment.Start sizing → After you planExplore Payment OptionsAfter configuring and sizing your project, review available financing options.View financing →
Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
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USA's Most Trusted MRCOOL Dealer – Free Shipping On Systems*

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MRCOOL DIY DIRECT / LIMITED-TIME PROJECT PACKS

5th Gen E-Star Single-Zone Project Packs

Complete 5th Gen E-Star single-zone systems with LineGuard and a Care Kit. Choose one system or a package for several spaces. Standard freight included on buy-now packages.*

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Folding Mounting Bracket for Mini Split Unit with Leveler

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Folding Mounting Bracket for Mini Split Unit with Leveler

Regular price $71.00

Sale price $71.00 Regular price ~~$88.75~~
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KWIK-E-VAC Line Set Flushing Kit Installation Simplifier for Mini Split Air Conditioning Systems

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KWIK-E-VAC Line Set Flushing Kit Installation Simplifier for Mini Split Air Conditioning Systems

Regular price $39.00

Sale price $39.00 Regular price ~~$48.75~~
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Air Conditioning Cleaning Canister – Aluminum A/C System Flush Bottle for Line Cleaning with Pressurized Air

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Air Conditioning Cleaning Canister – Aluminum A/C System Flush Bottle for Line Cleaning with Pressurized Air

Regular price $76.00

Sale price $76.00 Regular price ~~$95.00~~
You Save: $19.00
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