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DIY HVAC systems, MRCOOL, Mini-Splits, Air Conditioning
  • 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 →
    • Build Your System ›
      • Multi-Zone System Builder
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      • Mini-Split BTU Calculator
    • Shop by System ›
      • Shop All Mini Splits
      • Single Zone Systems
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    • Shop by Zones ›
      • 2 Zones
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    • Popular Series ›
      • 5th Gen DIY
      • DIY Hyper Heat
      • Easy Pro
      • Olympus
    Not sure what size?Plan before you buyUse the BTU calculator as a starting point for system sizing.Open BTU calculator →
  • Central HVAC›
    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 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 →
    • Build & Plan ›
      • Build a Central System
      • Manual J Load Calculator
      • Get a Free Quote
    • Shop by System ›
      • Central Ducted Heat Pumps
      • Dual Fuel Systems
      • Package Units
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    • Shop by Series ›
      • Universal Series
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      • Signature Series
    Sizing & planningManual J Load CalculatorEstimate heating and cooling loads before selecting equipment.Open Manual J →
  • Specialty›
    TravelCool rooftop RV air conditioner at a lakeside campsite Comfort for the roadRV air conditioningTravelCool RV Air ConditioningRooftop cooling and supplemental heat-pump heating for RV applications.Explore TravelCool →
    • TravelCool / RV Air Conditioners
    • Monoblock Heat Pumps
    • Compact Refrigeration
    • Water Heaters
    • Industrial HVLS Fans
    • MRBREEZE
    MRCOOL Monoblock heat pump installed through an exterior wall All-in-one HVACMonoblock Heat PumpsHeating and cooling without a separate outdoor unit.Shop Monoblock → MRCOOL compact refrigeration equipment for a walk-in cooler Walk-in coolingCompact RefrigerationSelf-contained refrigeration for walk-in cooler and freezer applications.Explore Refrigeration → MRCOOL industrial HVLS fan installed in a warehouse Large-space airflowIndustrial HVLS FansLarge-diameter fans for warehouses and other expansive spaces.Shop HVLS Fans →
  • Parts & Accessories›
    Replacement partsStart with your model numberShop genuine MRCOOL replacement parts. Confirm equipment details before ordering.Shop replacement parts →
    • Replacement Parts ›
      • Shop All Replacement Parts
      • Control Boards
      • Fan Motors
    • Installation & Accessories ›
      • Line Sets
      • Installation Kits
      • Couplers, Wire & Adapters
      • Condenser Mounting
      • Tools & Gauges
    Installation & accessoriesInstallation essentialsLine sets, mounting, kits, controls, and installation accessories.Shop accessories →
  • Build & Size›
    RecommendedPrimary configuration toolBuild a DIY Multi-Zone SystemBuild a matched MRCOOL DIY multi-zone system from zones through line-set lengths.Start building →
    • System Builders ›
      • Multi-Zone System Builder
      • Hybrid System Builder
      • Olympus System Builder
    • Sizing Tools ›
      • Mini-Split BTU Calculator
      • Manual J Load Calculator
      • HVAC Replacement & Sizing Guide
    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›
    • Start Learning ›
      • Mini Splits 101
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    • Help & Reference ›
      • DIY FAQs
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    • Official Product Information ›
      • Knowledge Center
      • Manuals & Documents
      • AHRI & EnergyGuide Resources
    • View All Learning Center
    Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
  • Support›
    Customer supportHow can we help?Contact our team, track an order, start a return, or find warranty help.Get help →
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    • Build Your System›
      • Multi-Zone System Builder
      • Olympus System Builder
      • Mini-Split BTU Calculator
    • Shop by System›
      • Shop All Mini Splits
      • Single Zone Systems
      • Multi-Zone Systems
      • DIY Pre-Charged Systems
    • Shop by Zones›
      • 2 Zones
      • 3 Zones
      • 4 Zones
      • 5 Zones
      • 6 Zones
    • Popular Series›
      • 5th Gen DIY
      • DIY Hyper Heat
      • Easy Pro
      • Olympus
    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 →
    • Build & Plan›
      • Build a Central System
      • Manual J Load Calculator
      • Get a Free Quote
    • Shop by System›
      • Central Ducted Heat Pumps
      • Dual Fuel Systems
      • Package Units
      • Gas Furnaces
    • Shop by Series›
      • Universal Series
      • Hyper Heat Series
      • VersaPro Series
      • Signature Series
    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 →
  • TravelCool rooftop RV air conditioner at a lakeside campsite Comfort for the roadRV air conditioningTravelCoolInverter-driven rooftop cooling and supplemental heat-pump heating for RV applications.Explore TravelCool → MRCOOL Monoblock heat pump installed through an exterior wall All-in-one HVACMonoblock Heat PumpsHeating and cooling without a separate outdoor unit.Shop Monoblock → MRCOOL compact refrigeration equipment for a walk-in cooler Walk-in coolingCompact RefrigerationSelf-contained refrigeration for walk-in cooler and freezer applications.Explore Refrigeration → MRCOOL industrial HVLS fan installed in a warehouse Large-space airflowIndustrial HVLS FansLarge-diameter fans for warehouses and other expansive spaces.Shop HVLS Fans →
    More specialtyWater Heaters →MRBREEZE →View all Specialty Equipment →
    • Replacement Parts›
      • 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›
      • Multi-Zone System Builder
      • Hybrid System Builder
      • Olympus System Builder
    • Sizing Tools›
      • Mini-Split BTU Calculator
      • Manual J Load Calculator
      • 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 →
    • Start Learning›
      • Mini Splits 101
      • DIY Installation Guide
      • Tools & Calculators
    • Help & Reference›
      • DIY FAQs
      • Error Codes
      • QMID Codes
    • Official Product Information›
      • Knowledge Center
      • Manuals & Documents
      • AHRI & EnergyGuide Resources
    • View All Learning Center
    Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
    • Customer Support›
      • Contact Us
      • Shipping & Tracking
      • Warranty
      • Start a Return
    • Programs & Policies›
      • Pro Contractor Program
      • Price Match Guarantee
      • Financing
    Customer supportHow can we help?Contact our team, track an order, start a return, or find warranty help.Get help →
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  • MRCOOL Mini Split Series Comparison›
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