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MRCOOL DIY Mini Split - 42,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump, DIY-B-348HP090924

MRCOOL DIY Mini Split - 42,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump, DIY-B-348HP090924

SKU DIY-B-348HP090924

by MRCOOL
Authorized Dealer Official
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Returns icon STRESS FREE RETURNS: 2 Year Returns

VIP icon PREMIUM QUALITY: Top Tier Products, Even Better Customer Care

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$4,522.00

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MRCOOL Accessories

MRCOOL 10 KW Heat Strip with Circuit Breaker for Packaged Units, MHK10P

MRCOOL 10 KW Heat Strip with Circuit Breaker for Packaged Units, MHK10P

MRCOOL 10 KW Signature Air Handler Heat Strip with Circuit Breaker, MHK10H

MRCOOL 10 KW Signature Air Handler Heat Strip with Circuit Breaker, MHK10H

MRCOOL 10 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK10U

MRCOOL 10 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK10U

MRCOOL 10kW Heat Kit for Central Ducted VersaPro® & Hyper Heat 2nd Gen Air Handler, MVPHK10

MRCOOL 10kW Heat Kit for Central Ducted VersaPro® & Hyper Heat 2nd Gen Air Handler, MVPHK10

MRCOOL 10kW Heat Kit for the Central Ducted Air Handler (Compatible with MRCOOL Hyper Heat & VersaPro Series), CENTRALHK10

MRCOOL 10kW Heat Kit for the Central Ducted Air Handler (Compatible with MRCOOL Hyper Heat & VersaPro Series), CENTRALHK10

MRCOOL 16FT 1/4" x 1/2" Flared Line Set Kit for 12K and 18K Olympus and Advantage Mini Split, MC16-1412

MRCOOL 16FT 1/4" x 1/2" Flared Line Set Kit for 12K and 18K Olympus and Advantage Mini Split, MC16-1412

MRCOOL 16FT 1/4" x 3/8" Flared Line Set Kit for 9K Olympus and Advantage Mini Split, MC16-1438

MRCOOL 16FT 1/4" x 3/8" Flared Line Set Kit for 9K Olympus and Advantage Mini Split, MC16-1438

MRCOOL 16FT 3/8" x 5/8" Flared Line Set Kit for 24K Olympus and Advantage Mini Split, MC16-3858

MRCOOL 16FT 3/8" x 5/8" Flared Line Set Kit for 24K Olympus and Advantage Mini Split, MC16-3858

MRCOOL 25FT 1/4 x 1/2 Flared Line Set Kit for 12K and 18K Olympus and Advantage Mini Split, MC25-1412

MRCOOL 25FT 1/4 x 1/2 Flared Line Set Kit for 12K and 18K Olympus and Advantage Mini Split, MC25-1412

MRCOOL 25FT 1/4 x 3/8 Flared Line Set Kit for 9K Olympus and Advantage Mini Split, MC25-1438

MRCOOL 25FT 1/4 x 3/8 Flared Line Set Kit for 9K Olympus and Advantage Mini Split, MC25-1438

MRCOOL 25FT 3/8 x 5/8 Flared Line Set Kit for 24K Olympus and Advantage Mini Split, MC25-3858

MRCOOL 25FT 3/8 x 5/8 Flared Line Set Kit for 24K Olympus and Advantage Mini Split, MC25-3858

MRCOOL 3/4 Flare-to-Weld Fitting, WF-34

MRCOOL 3/4 Flare-to-Weld Fitting, WF-34

MRCOOL 3/8 Flare-to-Weld Fitting, WF-38

MRCOOL 3/8 Flare-to-Weld Fitting, WF-38

MRCOOL 3/8 No-Vac Coupler + 3/4 No-Vac Coupler for Central Ducted and Universal Series, NVCOUPLER-3834

MRCOOL 3/8 No-Vac Coupler + 3/4 No-Vac Coupler for Central Ducted and Universal Series, NVCOUPLER-3834

MRCOOL 5 KW Heat Strip with Circuit Breaker for Packaged Units, MHK05P

MRCOOL 5 KW Heat Strip with Circuit Breaker for Packaged Units, MHK05P

MRCOOL 5 KW Signature Series Modular Blower Heat Strip with Circuit Breaker, MHK05B

MRCOOL 5 KW Signature Series Modular Blower Heat Strip with Circuit Breaker, MHK05B

MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK05U

MRCOOL 5 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK05U

MRCOOL 5kW Heat Kit for Central Ducted VersaPro® & Hyper Heat 2nd Gen Air Handler, MVPHK05

MRCOOL 5kW Heat Kit for Central Ducted VersaPro® & Hyper Heat 2nd Gen Air Handler, MVPHK05

MRCOOL 5kW Heat Kit for the Central Ducted Air Handler (Compatible with MRCOOL Hyper Heat & VersaPro Series), CENTRALHK05

MRCOOL 5kW Heat Kit for the Central Ducted Air Handler (Compatible with MRCOOL Hyper Heat & VersaPro Series), CENTRALHK05

MRCOOL 5kw ProDirect Heat Kit, PHK05H

MRCOOL 5kw ProDirect Heat Kit, PHK05H

MRCOOL 7.5 KW Heat Strip with Circuit Breaker for Packaged Units, MHK07P

MRCOOL 7.5 KW Heat Strip with Circuit Breaker for Packaged Units, MHK07P

MRCOOL 7.5 KW Signature Air Handler Heat Strip with Circuit Breaker, MHK07H

MRCOOL 7.5 KW Signature Air Handler Heat Strip with Circuit Breaker, MHK07H

MRCOOL 7.5 KW Signature Series Modular Blower Heat Strip with Circuit Breaker, MHK07B

MRCOOL 7.5 KW Signature Series Modular Blower Heat Strip with Circuit Breaker, MHK07B

MRCOOL 8 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK08U

MRCOOL 8 KW Universal Air Handler Heat Strip with Circuit Breaker, MHK08U

MRCOOL 8kW Heat Kit for Central Ducted VersaPro® & Hyper Heat 2nd Gen Air Handler, MVPHK08

MRCOOL 8kW Heat Kit for Central Ducted VersaPro® & Hyper Heat 2nd Gen Air Handler, MVPHK08

MRCOOL 8kW Heat Kit for the Central Ducted Air Handler (Compatible with MRCOOL Hyper Heat & VersaPro Series), CENTRALHK08

MRCOOL 8kW Heat Kit for the Central Ducted Air Handler (Compatible with MRCOOL Hyper Heat & VersaPro Series), CENTRALHK08

MRCOOL Bluetooth Mini-Stat Thermostat for Ductless Mini Split in White, MTSK02

MRCOOL Bluetooth Mini-Stat Thermostat for Ductless Mini Split in White, MTSK02

MRCOOL Condenser Wall Mounting Kit for 24k to 36k BTU Ductless Split System, MB440A

MRCOOL Condenser Wall Mounting Kit for 24k to 36k BTU Ductless Split System, MB440A

MRCOOL Condenser Wall Mounting Kit for 9k to 18k BTU Ductless Split System, MB176

MRCOOL Condenser Wall Mounting Kit for 9k to 18k BTU Ductless Split System, MB176

MRCOOL DIYCOUPLER-14 + DIYCOUPLER-12 w/50 ft of Communication Wire, DIYCOUPLER-1412K50

MRCOOL DIYCOUPLER-14 + DIYCOUPLER-12 w/50 ft of Communication Wire, DIYCOUPLER-1412K50

MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 (Two Sets) w/75 ft of Communication Wire, DIYCOUPLER-3858K75

MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 (Two Sets) w/75 ft of Communication Wire, DIYCOUPLER-3858K75

MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 w/50 ft of Communication Wire, DIYCOUPLER-3858K50

MRCOOL DIYCOUPLER-38 + DIYCOUPLER-58 w/50 ft of Communication Wire, DIYCOUPLER-3858K50

MRCOOL Downflow Application 14 In. Square to Round Adaptor Kit for 2-3 Signature Packaged Units, M14DSR4260A

MRCOOL Downflow Application 14 In. Square to Round Adaptor Kit for 2-3 Signature Packaged Units, M14DSR4260A

MRCOOL Downflow Kit, MSHDK1830

MRCOOL Downflow Kit, MSHDK1830

MRCOOL Downflow Kit, MSHDK3660

MRCOOL Downflow Kit, MSHDK3660

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MRCOOL DIY Mini Split - 42,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump, DIY-B-348HP090924

Step into the future of climate control with the MRCOOL DIY Mini Split 42,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump — a complete, powerful, and smart multi-zone HVAC solution designed for the savvy DIY installer. This 4th Generation system puts professional-grade heating and cooling power right in your hands, allowing you to customize comfort across three separate zones without the hassle or expense of professional installation.

Inside this all-in-one package, you get a robust 48,000 BTU multi-zone condenser paired with three intelligent air handlers: two 9,000 BTU units perfect for bedrooms or smaller spaces, and one 24,000 BTU unit designed to efficiently manage larger rooms up to 1,000 sq. ft. Each air handler is lightweight, compact, and equipped with multiple operating modes — including COOL, HEAT, AUTO, DRY, and SLEEP — so you can tailor the environment to your exact needs.

What truly sets this system apart is its DIY-friendly design without compromising on performance. The condenser delivers an impressive 20.5 SEER efficiency rating, ensuring energy savings that translate into lower utility bills. It’s built to work reliably even when outdoor temperatures fall as low as 5°F, so your comfort never has to take a back seat, no matter the season.

Control is effortless thanks to the enhanced WiFi capabilities integrated into each air handler. Whether you prefer to adjust settings from your smartphone using the Smart HVAC app or through voice commands via Amazon Alexa or Google Assistant, this system adapts to your lifestyle seamlessly.

Plus, the peace of mind that comes with the industry’s only limited lifetime compressor warranty (when registered through the MRCOOL Care Program) means your investment is protected long-term.

Note: This package does not include linesets, so be sure to add those separately to complete your installation.

  • DIY installation with professional-grade performance
  • Multi-zone control for three independent areas
  • Energy-efficient 20.5 SEER rating
  • Smart WiFi control via app and voice assistants
  • Versatile air handlers with multiple modes and coverage areas
  • Limited lifetime compressor warranty for peace of mind

Picture having full control over the comfort of multiple rooms from your smartphone — cooling bedrooms, heating living spaces, and dehumidifying basements — all powered by a system you installed yourself. No waiting for contractors, no hidden fees, just smart, efficient comfort tailored to your needs.

Upgrade your space with the MRCOOL DIY Mini Split 3 Zone system — where powerful performance meets DIY freedom.

    PRODUCT SPECIFICATIONS:
    Condenser

    Product Dimensions 37.48"W x 16.34"D x 52.48"H
    Cooling Capacity 48,000 BTU
    Heating Capacity 48,000 BTU
    Zone Capacity 5
    Cool Mode - Outdoor Operating Temperature Range 5F ~ 122F
    Heat Mode - Outdoor Operating Temperature Range 5F ~ 75.2F
    SEER 20.5
    EER 11
    Voltage Requires a minimum of 208V-230V/60HZ/40-60A (please check your home meets this electrical requirement prior to purchase)
    Registered Warranty
    		 7 Years Replacement on Compressor, 5 Years Parts


    Air Handler 9K BTU

    Product Dimensions 31.57"W x 7.44"D x 11.69"H
    Mount Type Wall
    Cooling Capacity 9,000 BTU
    Heating Capacity 9,000 BTU
    Registered Warranty
    		 5 Years Parts
    Modes Auto - auto selects from Cool, Heat or Fan-Only
    Dry - dehumidify
    Cool
    Heat
    Fan Only
    Quiet
    Sleep


    Air Handler 24K BTU

    Product Dimensions 42.52"W x 8.90"D x 13.19"H
    Mount Type Wall
    Cooling Capacity 23,000 BTU
    Heating Capacity 25,000 BTU
    Registered Warranty 5 Years Parts
    Modes Auto - auto selects from Cool, Heat or Fan-Only
    Dry - dehumidify
    Cool
    Heat
    Fan Only
    Quiet
    Sleep
    Installation Manual
    Product Brochure
    Performance Specifications
    Warranty
    Energy Guide
    AHRI Certificate

    For Shipping & return information visit here

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    Frequently Asked Questions About MRCOOL DIY Mini Split - 42,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump, DIY-B-348HP090924

    Most Frequently Asked Questions

    Other Questions

    Product Overview

    • Zone / ROOM:

      Zone / ROOM: 3 Zone

    • Air Handler BTU:

      Air Handler BTU: 48k

    • Coverage Area:

      Coverage Area: 1750 sq.ft

    • Condenser BTU:

      Condenser BTU: 48k

    • Outdoor Operating Temp (Cool/ heat):

      Outdoor Operating Temp (Cool/ heat): 5F ~ 75.2F for heat | 5F ~ 122F for cool

    • Warranty

      Warranty 7 Years Compressor & 5 Years Parts Warranty

    MRCOOL DIY Mini Split - 42,000 BTU 3 Zone Ductless Air Conditioner and Heat Pump, DIY-B-348HP090924 Reviews

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