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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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    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 →
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    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 →
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    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 →
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    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 →
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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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    Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
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    • Build Your System›
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    • Shop by Zones›
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    • 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
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      • 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
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    • 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
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    • View All Learning Center
    Learn the basicsNew to MRCOOL? Start hereGet straightforward guides for choosing, planning, and installing your system.Start learning →
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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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Search results

  • Clean-N-Safe 83780 – Biodegradable HVAC Coil Cleaner (20 oz. Aerosol

    Rectorseal 83780 Clean-N-Safe 20 oz Aerosol Cleaner

    SALE

    Rectorseal 83780 Clean-N-Safe 20 oz Aerosol Cleaner

    Regular price $22.00
    Sale price $22.00 Regular price $27.50
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  • RectorSeal round ventilation grille

    Rectorseal 81901 Grille Round 6 x 6 Inch Plastic

    SALE

    Rectorseal 81901 Grille Round 6 x 6 Inch Plastic

    Regular price $49.00
    Sale price $49.00 Regular price $61.25
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  • RectorSeal HVAC coil-cleaning supplies

    Rectorseal 82561 Desolv 16 oz Clear Coil Cleaner

    SALE

    Rectorseal 82561 Desolv 16 oz Clear Coil Cleaner

    Regular price $22.00
    Sale price $22.00 Regular price $27.50
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  • MRCOOL HVAC electronic control-board assembly

    Advantage Series A-12-HP-WMAH-230C Control Board Assembly

    SALE

    Advantage Series A-12-HP-WMAH-230C Control Board Assembly

    Regular price $199.61
    Sale price $199.61 Regular price $226.75
    You Save: $27.14
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  • MRCOOL DIY 16ft pre-charged mini split line set R-454B for Gen 5 HVAC systems, no vacuum required, DIY air conditioner refrigerant tubing installation

    MRCOOL 5th Gen Pre-Charged Mini Split Line Set – R-454B

    SALE

    MRCOOL 5th Gen Pre-Charged Mini Split Line Set – R-454B

    Regular price $227.00
    Sale price $227.00 Regular price $283.75
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  • MRCOOL wall-mounted smart HVAC thermostat

    MRCOOL TravelCool Wired Wall Controller / Thermostat - MRDCW

    SALE

    MRCOOL TravelCool Wired Wall Controller / Thermostat - MRDCW

    Regular price $33.00
    Sale price $33.00 Regular price $63.00
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  • Complete wall mount condenser installation kit for systems up to 18k BTU, including bracket, disconnect box, electrical whip, and HVAC surge protector.

    Complete Wall Mount Condenser Installation Kit

    SALE

    Complete Wall Mount Condenser Installation Kit

    Regular price $295.00
    Sale price $295.00 Regular price $368.75
    You Save: $73.75
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  • MRCOOL DIY E-Star Single-Zone Mini Split — 9,000 BTU, 25 ft

    MRCOOL 5th Gen ENERGY STAR® DIY Single Zone Mini Split (9k–36k BTU)

    SALE

    MRCOOL 5th Gen ENERGY STAR® DIY Single Zone Mini Split (9k–36k BTU)

    Regular price $2,330.00
    Sale price $2,330.00 Regular price $2,912.50
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  • MRCOOL LineGuard 4.5-Inch 16-Piece Complete Line Set Cover Kit for Ductless Mini-Split or Central System (MLG450) -

    MRCOOL LineGuard 4.5-Inch 16-Piece Complete Line Set Cover Kit for Ductless Mini-Split or Central System (MLG450)

    SALE

    MRCOOL LineGuard 4.5-Inch 16-Piece Complete Line Set Cover Kit for Ductless Mini-Split or Central System (MLG450)

    Regular price $124.00
    Sale price $124.00 Regular price $155.00
    You Save: $31.00
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  • MRCOOL thermistor temperature sensor for A-09-HP-WMAH-2308 mini split air handler replacement part fixing cooling heating and temperature control issues

    MRCOOL Mini Split Thermistor (Temp Sensor) for A-09-HP-WMAH-230B Air Handler | OEM Replacement

    SALE

    MRCOOL Mini Split Thermistor (Temp Sensor) for A-09-HP-WMAH-230B Air Handler | OEM Replacement

    Regular price $46.73
    Sale price $46.73 Regular price $52.99
    You Save: $6.26
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  • MRCOOL DIY 5th Gen Multi-Zone 2-Zone 27,000 BTU 23 SEER2 (6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump

    MRCOOL DIY 5th Gen Multi-Zone 2-Zone 27,000 BTU 23 SEER2 (6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump

    SALE

    MRCOOL DIY 5th Gen Multi-Zone 2-Zone 27,000 BTU 23 SEER2 (6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump

    Regular price $3,578.00
    Sale price $3,578.00 Regular price $4,472.50
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  • RectorSeal HVAC disconnect box with electrical whip

    RectorSeal RSH-50 VRMDC Kit | HVAC Surge Protector, Voltage Monitor & 60A Disconnect Switch

    SALE

    RectorSeal RSH-50 VRMDC Kit | HVAC Surge Protector, Voltage Monitor & 60A Disconnect Switch

    Regular price $492.53
    Sale price $492.53 Regular price $572.26
    You Save: $79.73
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  • MRCOOL electric heat-strip assembly with wiring and controls

    MRCOOL UHK15 15kW Electric Heat Kit with Circuit Breakers for Universal Series (R-454B)

    SALE

    MRCOOL UHK15 15kW Electric Heat Kit with Circuit Breakers for Universal Series (R-454B)

    Regular price $329.00
    Sale price $329.00 Regular price $411.25
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  • MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 23.9 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump

    MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 23.9 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump

    SALE

    MRCOOL DIY 5th Gen Multi-Zone 3-Zone 18,000 BTU 23.9 SEER2 (6K + 6K + 9K) Ductless Mini-Split Air Conditioner and Heat Pump

    Regular price $3,643.00
    Sale price $3,643.00 Regular price $4,553.75
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  • MRCOOL DIY six-zone system with six ceiling cassettes, two-fan condenser, line sets and controls

    MRCOOL DIY 5th Gen Multi-Zone 6-Zone 48,000 BTU 22 SEER2 (6K + 6K + 6K + 9K + 9K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

    SALE

    MRCOOL DIY 5th Gen Multi-Zone 6-Zone 48,000 BTU 22 SEER2 (6K + 6K + 6K + 9K + 9K + 12K) Ductless Mini-Split Air Conditioner and Heat Pump with Ceiling Cassettes

    Regular price $11,519.00
    Sale price $11,519.00 Regular price $14,398.75
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  • MRCOOL UHK20 20kW electric heat kit with dual double-pole circuit breakers for Universal Series R-454B air handlers

    MRCOOL UHK20 20kW Electric Heat Kit with Dual Circuit Breakers for Universal Series (R-454B)

    SALE

    MRCOOL UHK20 20kW Electric Heat Kit with Dual Circuit Breakers for Universal Series (R-454B)

    Regular price $387.00
    Sale price $387.00 Regular price $483.75
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  • RectorSeal RSH-60 VMD HVAC surge protector and voltage monitoring device for mini splits and heat pumps

    RectorSeal RSH-60 VMD HVAC Surge Protector & Voltage Monitoring Device | 60kA Type 1 SPD

    SALE

    RectorSeal RSH-60 VMD HVAC Surge Protector & Voltage Monitoring Device | 60kA Type 1 SPD

    Regular price $200.00
    Sale price $200.00 Regular price $250.00
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  • RectorSeal RSH-120 whole home surge protector for HVAC systems and electrical panels with Type 1 SPD protection

    RectorSeal RSH-120 Whole Home Surge Protector | Type 1 SPD for HVAC & Electrical Systems

    SALE

    RectorSeal RSH-120 Whole Home Surge Protector | Type 1 SPD for HVAC & Electrical Systems

    Regular price $277.00
    Sale price $277.00 Regular price $346.25
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  • RectorSeal RSH-60 Type 1 HVAC surge protector for 120/240V single-phase systems with NEMA 4X weatherproof enclosure

    RectorSeal RSH-60 HVAC Surge Protector | Type 1 SPD for Mini Splits, Heat Pumps & Air Conditioners

    SALE

    RectorSeal RSH-60 HVAC Surge Protector | Type 1 SPD for Mini Splits, Heat Pumps & Air Conditioners

    Regular price $293.00
    Sale price $293.00 Regular price $366.25
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  • MRCOOL dual-fuel split system with gas furnace, cased coil and outdoor condenser

    MRCOOL 2 Ton Central VersaPro Air Conditioner and 80% AFUE, 60K BTU 17.5" Gas Furnace Split System - Upflow, Horizontal, or Downflow

    SALE

    MRCOOL 2 Ton Central VersaPro Air Conditioner and 80% AFUE, 60K BTU 17.5" Gas Furnace Split System - Upflow, Horizontal, or Downflow

    Regular price $3,202.00
    Sale price $3,202.00 Regular price $4,002.50
    You Save: $800.50
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  • RectorSeal HVAC disconnect box with electrical whip

    RectorSeal RSH-50 30A Fused Disconnect with Surge Protection | HVAC Disconnect Box for Mini Splits & Heat Pumps

    SALE

    RectorSeal RSH-50 30A Fused Disconnect with Surge Protection | HVAC Disconnect Box for Mini Splits & Heat Pumps

    Regular price $194.00
    Sale price $194.00 Regular price $230.00
    You Save: $36.00
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  • MRCOOL dual-fuel split system with gas furnace, cased coil and outdoor condenser

    MRCOOL 2 Ton Central Hyper Heat Air Conditioner and 80% AFUE, 80K BTU 17.5" Gas Furnace Split System - Upflow, Horizontal, or Downflow

    SALE

    MRCOOL 2 Ton Central Hyper Heat Air Conditioner and 80% AFUE, 80K BTU 17.5" Gas Furnace Split System - Upflow, Horizontal, or Downflow

    Regular price $3,986.00
    Sale price $3,986.00 Regular price $4,982.50
    You Save: $996.50
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  • RectorSeal HVAC disconnect box with electrical whip

    RectorSeal RSH-50 60A Non-Fused HVAC Disconnect with Built-In Surge Protection | NEMA 4X Weatherproof Disconnect Box

    RectorSeal RSH-50 60A Non-Fused HVAC Disconnect with Built-In Surge Protection | NEMA 4X Weatherproof Disconnect Box

    Regular price $228.00
    Sale price $228.00 Regular price
    Unit price /  per 
    ⚠️ Only 6 left in stock!
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  • Fortress 4.5" Soffit Inlet – White (84114) | Lineset Cover Intake | MRCOOL Compatible

    Fortress 4.5" Soffit Inlet – White (84114) | Lineset Cover Intake | MRCOOL Compatible

    SALE

    Fortress 4.5" Soffit Inlet – White (84114) | Lineset Cover Intake | MRCOOL Compatible

    Regular price $35.00
    Sale price $35.00 Regular price $43.75
    You Save: $8.75
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