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MRCOOL DIY Mini Split - 39,000 BTU 3 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 16 ft. Install Kit, DIY348HPC091218-16

SKU DIY348HPC091218-16
by MRCOOL
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Description

MRCOOL DIY Mini Split - 39,000 BTU 3 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 16 ft. Install Kit (DIY348HPC091218-16)

Step into the future of multi-zone climate control with the MRCOOL DIY Mini Split 39,000 BTU 3 Zone Ceiling Cassette system — a powerhouse solution designed for business owners, contractors, and HVAC professionals who demand efficiency, flexibility, and ease of installation. This all-in-one system combines a robust 48,000 BTU multi-zone condenser with three ceiling cassette air handlers of varying capacities (9K, 12K, and 18K BTU), giving you the power to deliver tailored comfort across multiple rooms or zones without the complexity of ductwork.

Imagine offering your clients precise temperature control in every space — from cozy bedrooms and bustling workshops to spacious living areas — all managed seamlessly with included remotes or smart controls. The sleek ceiling cassette air handlers fit discreetly between standard 16-inch joists, creating an out-of-sight installation that preserves the aesthetic of any room. Each unit is engineered for maximum versatility, with multiple operating modes including cooling, heating, auto, dehumidify, fan-only, and sleep mode, ensuring comfort no matter the season.

At the heart of this system is the 48,000 BTU multi-zone condenser, built for durability and efficiency. With an impressive 21.5 SEER rating, it delivers energy savings that your customers will appreciate on their utility bills. The Gold Fin® coating protects the condenser from corrosion, making it ideal for installations in coastal or harsh environments. Plus, this condenser is built to perform reliably even when outdoor temperatures dip as low as 5°F, providing year-round comfort without compromise. Backed by a limited lifetime compressor warranty through MRCOOL’s Care Program, along with 7 years replacement on the compressor and 5 years on parts, you can confidently offer a product that stands the test of time.

Installation is where MRCOOL truly shines. The system comes with three 16-foot pre-charged Quick Connect Line Sets, eliminating the need for vacuum pumps or specialized technicians. This means you can complete installations faster, reduce labor costs, and scale your business without sacrificing quality. The included remotes put intuitive control in your clients’ hands, allowing them to adjust settings zone-by-zone for personalized comfort.

Key Features:
  • Powerful Multi-Zone Capacity: 48,000 BTU condenser paired with 9K, 12K, and 18K BTU ceiling cassette air handlers for flexible coverage up to 750 sq. ft. per zone
  • Energy Efficient: 21.5 SEER rating reduces operating costs while maintaining peak performance
  • Durable Design: Gold Fin® coated condenser resists corrosion for long-lasting reliability
  • Versatile Air Handlers: Multiple modes including Cool, Heat, Auto, Dry, Fan, and Sleep for customized comfort
  • Sleek Ceiling Installation: Fits between 16" joists, including pre-manufactured I-joists, for an unobtrusive, modern look
  • DIY-Friendly Installation: Pre-charged Quick Connect Line Sets for technician-free setup and faster project completion
  • Comprehensive Warranty: Limited lifetime compressor warranty with registration, plus 7 years compressor and 5 years parts coverage

This MRCOOL DIY Mini Split system is the ultimate solution for contractors and business owners who want to deliver professional-grade, energy-efficient, multi-zone HVAC systems with ease. Picture yourself completing installations quickly, reducing overhead, and providing your customers with the ultimate in comfort and convenience. With MRCOOL, you’re not just selling equipment — you’re offering peace of mind, reliability, and a future-proof climate solution that keeps your business and your clients thriving.




Package Includes

Condenser


  • Energy Efficient. This 4 Zone condenser, when paired with select MRCOOL air handlers, is capable of producing an impressive 21.5 SEER efficiency rating.
  • Works In All Environments. The capability to continue to deliver heating performance when temperatures reach 5°F
  • Lifetime Warranty. For added peace of mind, this is the only condenser on the market that comes with a limited lifetime compressor warranty. Simply register into the MRCOOL Care Program to get the lifetime warranty!

    Air Handler, 9K BTU, Quantity 1

    • Large Coverage Area. Handler covers an area up to 375 sq. ft.
    • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
    • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
    • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

    Air Handler, 12K BTU, Quantity 1

    • Large Coverage Area. Handler covers an area up to 500 sq. ft.
    • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
    • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
    • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

    Air Handler, 18K BTU, Quantity 1

    • Large Coverage Area. Handler covers an area up to 750 sq. ft.
    • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
    • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
    • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
    • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

            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 21.5
            EER 10.5
            Voltage Requires a minimum of 208V-230V/60HZ/18-25A (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 50.31"W x 13.19"D x 8.98"H
            Mount Type Ceiling Cassette
            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 12K BTU

            Product Dimensions 50.31"W x 13.19"D x 8.98"H
            Mount Type Ceiling Cassette
            Cooling Capacity 12,000 BTU
            Heating Capacity 12,000 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 18K BTU

            Product Dimensions 50.31"W x 13.19"D x 8.98"H
            Mount Type Ceiling Cassette
            Cooling Capacity 17,000 BTU
            Heating Capacity 19,000 BTU
            Registered Warranty 5 Years Parts
            Modes Auto - Auto selects from Cool, Heat or Fan-Only
            Dry - dehumidify
            Cool
            Heat
            Fan Only
            Quiet
            Sleep


            Line Set

            Length 16 Feet
            Liquid Line Size 1/4"
            Suction Line Size 1/2"
            Installation Manual
            Product Brochure
            Performance Specifications
            Warranty
            Energy Guide
            AHRI Certificate

            Shipping and Return

            We offer Free Express Shipping on all of our products. Handling times are 1-2 business days and Delivery takes roughly 3-14 Business days 

            For more Shipping information visit here

            We offer a 2 Year (730 Day) return for our products. 

            For more Return information visit here

            COVERAGE AREA

            HIVE WARRANTY

            HVAC Hive Warranty Information:

            HVAC Hive is an authorized dealer for every product on our website. Every HVAC system and component comes with its original manufacturer's warranty, guaranteeing you receive a functional, quality product.

            Our 5-Year Parts & Labor Warranty Promise: We go beyond the standard coverage. If a manufacturer's warranty doesn't cover your product for a full 5 years, HVAC Hive will extend both parts and labor warranty to complete the 5-year coverage period.

            Example: If your manufacturer covers 2 years parts & labor, we'll cover an additional 3 years — giving you a full 5 years of parts and labor protection.

            Warranty Coverage Includes:

            • Parts replacement for manufacturing defects
            • Labor costs for covered repairs
            • System malfunctions and component failures

            Warranty Details:

            • Residential, light commercial, and full commercial warranties vary based on your usage
            • Specific warranty terms and coverage periods are listed on each product page
            • Both parts and labor are covered under our extended warranty program

            Making a Warranty Claim: Contact our Worker Bee Support team at 1-888-712-2465 or karim@hvachive.com . We'll handle your claim quickly and professionally, covering both parts and labor costs. You can also contact the manufacturer directly if preferred.

            Questions? Need help understanding your parts & labor warranty coverage? Our team is here to explain the details and ensure you're fully protected.

            Contact US
            Request an Installer

            Product Overview

            • Zone / ROOM:

              Zone / ROOM: 3 Zone

            • Air Handler BTU:

              Air Handler BTU: 9k + 12k + 18k

            • Condenser BTU:

              Condenser BTU: 48k

            • Outdoor Operating Temp (Cool/ heat):

              Outdoor Operating Temp (Cool/ heat): Heating -13°F to 75.2°F & Cooling 5°F to 122°F

            • Warranty

              Warranty 7-year compressor warranty & 5-year parts warranty

            Description

            MRCOOL DIY Mini Split - 39,000 BTU 3 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 16 ft. Install Kit (DIY348HPC091218-16)

            Step into the future of multi-zone climate control with the MRCOOL DIY Mini Split 39,000 BTU 3 Zone Ceiling Cassette system — a powerhouse solution designed for business owners, contractors, and HVAC professionals who demand efficiency, flexibility, and ease of installation. This all-in-one system combines a robust 48,000 BTU multi-zone condenser with three ceiling cassette air handlers of varying capacities (9K, 12K, and 18K BTU), giving you the power to deliver tailored comfort across multiple rooms or zones without the complexity of ductwork.

            Imagine offering your clients precise temperature control in every space — from cozy bedrooms and bustling workshops to spacious living areas — all managed seamlessly with included remotes or smart controls. The sleek ceiling cassette air handlers fit discreetly between standard 16-inch joists, creating an out-of-sight installation that preserves the aesthetic of any room. Each unit is engineered for maximum versatility, with multiple operating modes including cooling, heating, auto, dehumidify, fan-only, and sleep mode, ensuring comfort no matter the season.

            At the heart of this system is the 48,000 BTU multi-zone condenser, built for durability and efficiency. With an impressive 21.5 SEER rating, it delivers energy savings that your customers will appreciate on their utility bills. The Gold Fin® coating protects the condenser from corrosion, making it ideal for installations in coastal or harsh environments. Plus, this condenser is built to perform reliably even when outdoor temperatures dip as low as 5°F, providing year-round comfort without compromise. Backed by a limited lifetime compressor warranty through MRCOOL’s Care Program, along with 7 years replacement on the compressor and 5 years on parts, you can confidently offer a product that stands the test of time.

            Installation is where MRCOOL truly shines. The system comes with three 16-foot pre-charged Quick Connect Line Sets, eliminating the need for vacuum pumps or specialized technicians. This means you can complete installations faster, reduce labor costs, and scale your business without sacrificing quality. The included remotes put intuitive control in your clients’ hands, allowing them to adjust settings zone-by-zone for personalized comfort.

            Key Features:
            • Powerful Multi-Zone Capacity: 48,000 BTU condenser paired with 9K, 12K, and 18K BTU ceiling cassette air handlers for flexible coverage up to 750 sq. ft. per zone
            • Energy Efficient: 21.5 SEER rating reduces operating costs while maintaining peak performance
            • Durable Design: Gold Fin® coated condenser resists corrosion for long-lasting reliability
            • Versatile Air Handlers: Multiple modes including Cool, Heat, Auto, Dry, Fan, and Sleep for customized comfort
            • Sleek Ceiling Installation: Fits between 16" joists, including pre-manufactured I-joists, for an unobtrusive, modern look
            • DIY-Friendly Installation: Pre-charged Quick Connect Line Sets for technician-free setup and faster project completion
            • Comprehensive Warranty: Limited lifetime compressor warranty with registration, plus 7 years compressor and 5 years parts coverage

            This MRCOOL DIY Mini Split system is the ultimate solution for contractors and business owners who want to deliver professional-grade, energy-efficient, multi-zone HVAC systems with ease. Picture yourself completing installations quickly, reducing overhead, and providing your customers with the ultimate in comfort and convenience. With MRCOOL, you’re not just selling equipment — you’re offering peace of mind, reliability, and a future-proof climate solution that keeps your business and your clients thriving.




            Package Includes

            Condenser


            • Energy Efficient. This 4 Zone condenser, when paired with select MRCOOL air handlers, is capable of producing an impressive 21.5 SEER efficiency rating.
            • Works In All Environments. The capability to continue to deliver heating performance when temperatures reach 5°F
            • Lifetime Warranty. For added peace of mind, this is the only condenser on the market that comes with a limited lifetime compressor warranty. Simply register into the MRCOOL Care Program to get the lifetime warranty!

              Air Handler, 9K BTU, Quantity 1

              • Large Coverage Area. Handler covers an area up to 375 sq. ft.
              • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
              • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
              • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
              • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

              Air Handler, 12K BTU, Quantity 1

              • Large Coverage Area. Handler covers an area up to 500 sq. ft.
              • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
              • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
              • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
              • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

              Air Handler, 18K BTU, Quantity 1

              • Large Coverage Area. Handler covers an area up to 750 sq. ft.
              • Versatile. Incredibly versatile and equipped with multiple operating modes, which include COOL, HEAT, AUTO, DRY (dehumidify), and SLEEP.
              • Out of Sight Design. This unit has low profile installation for out of sight heating & cooling.
              • Worry-Free Installation. Easily install between all types of joists on 16" center - including pre-manufactured I-joists
              • Easy Air Filter Access. By activating the Elevation function on the remote controller (or smart controller), the filter panel will lower for easy air filter maintenance.

                      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 21.5
                      EER 10.5
                      Voltage Requires a minimum of 208V-230V/60HZ/18-25A (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 50.31"W x 13.19"D x 8.98"H
                      Mount Type Ceiling Cassette
                      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 12K BTU

                      Product Dimensions 50.31"W x 13.19"D x 8.98"H
                      Mount Type Ceiling Cassette
                      Cooling Capacity 12,000 BTU
                      Heating Capacity 12,000 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 18K BTU

                      Product Dimensions 50.31"W x 13.19"D x 8.98"H
                      Mount Type Ceiling Cassette
                      Cooling Capacity 17,000 BTU
                      Heating Capacity 19,000 BTU
                      Registered Warranty 5 Years Parts
                      Modes Auto - Auto selects from Cool, Heat or Fan-Only
                      Dry - dehumidify
                      Cool
                      Heat
                      Fan Only
                      Quiet
                      Sleep


                      Line Set

                      Length 16 Feet
                      Liquid Line Size 1/4"
                      Suction Line Size 1/2"
                      Installation Manual
                      Product Brochure
                      Performance Specifications
                      Warranty
                      Energy Guide
                      AHRI Certificate

                      Shipping and Return

                      We offer Free Express Shipping on all of our products. Handling times are 1-2 business days and Delivery takes roughly 3-14 Business days 

                      For more Shipping information visit here

                      We offer a 2 Year (730 Day) return for our products. 

                      For more Return information visit here

                      COVERAGE AREA

                      HIVE WARRANTY

                      HVAC Hive Warranty Information:

                      HVAC Hive is an authorized dealer for every product on our website. Every HVAC system and component comes with its original manufacturer's warranty, guaranteeing you receive a functional, quality product.

                      Our 5-Year Parts & Labor Warranty Promise: We go beyond the standard coverage. If a manufacturer's warranty doesn't cover your product for a full 5 years, HVAC Hive will extend both parts and labor warranty to complete the 5-year coverage period.

                      Example: If your manufacturer covers 2 years parts & labor, we'll cover an additional 3 years — giving you a full 5 years of parts and labor protection.

                      Warranty Coverage Includes:

                      • Parts replacement for manufacturing defects
                      • Labor costs for covered repairs
                      • System malfunctions and component failures

                      Warranty Details:

                      • Residential, light commercial, and full commercial warranties vary based on your usage
                      • Specific warranty terms and coverage periods are listed on each product page
                      • Both parts and labor are covered under our extended warranty program

                      Making a Warranty Claim: Contact our Worker Bee Support team at 1-888-712-2465 or karim@hvachive.com . We'll handle your claim quickly and professionally, covering both parts and labor costs. You can also contact the manufacturer directly if preferred.

                      Questions? Need help understanding your parts & labor warranty coverage? Our team is here to explain the details and ensure you're fully protected.

                      Contact US

                      Commercial HVAC PROS!

                      Unlock Installer Benefits Now:

                      • ✓ Exclusive BULK Pricing
                      • ✓ Limited Time Deals
                      • ✓ Unmatched Service & Support
                      • ✓ Technical support
                      • ✓ Extended Warranty & Maintenance
                      "Their technical expertise in commercial HVAC systems is outstanding. From equipment selection to installation support, they provided everything we needed. The bulk pricing saved us thousands on our multi-building project, and their 24/7 technical support kept us running smoothly."
                      - Marcus R., HVAC Project Manager, 06/24

                      You'll hear from us during business hours

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                      Need Professional Installation?

                      Get Connected with Certified HVAC Installers:

                      • ✓ Pre-Vetted, Licensed & Insured Installers
                      • ✓ 2-3 Local Options in Your Area
                      • ✓ Specialists in Your Equipment Type
                      • ✓ Competitive, Transparent Pricing
                      • ✓ Fast Response - Within 24 Hours

                      How it works:

                      1. Fill out the form below with your project details
                      2. We'll match you with 2-3 qualified installers in your area
                      3. Installers contact you directly with quotes and availability
                      4. You choose the best fit for your project

                      "I bought a heat pump online but wasn't sure about installation. HVAC Hive connected me with three local contractors within hours. I chose one based on reviews and pricing - he installed it perfectly the next week. Made the whole process so much easier!"
                      - Jennifer M., Homeowner, Phoenix AZ

                      ✓ No obligation quotes | ✓ All installers background checked | ✓ Free service - you only pay the installer

                      We'll connect you with installers within 48 hours during business days

                      Frequently Asked Questions about MRCOOL DIY Mini Split - 39,000 BTU 3 Zone Ceiling Cassette Ductless Air Conditioner and Heat Pump with 16 ft. Install Kit, DIY348HPC091218-16

                      Most Frequently Asked Questions

                      Yes, Mr. Cool DIY mini splits are generally well-regarded for their easy installation, reliable performance, and energy efficiency, making them a solid choice for homeowners looking for a do-it-yourself HVAC solution.
                      A MRCOOL mini-split typically lasts 10 to 20 years with proper installation and regular maintenance
                      MRCOOL DIY mini splits are a popular choice among homeowners thanks to their straightforward self-installation process, dependable heating and cooling, and good energy efficiency, offering a practical solution for those looking to avoid professional installation costs.

                      Other Questions

                      Running a mini split typically costs between $30 and $80 per month, depending on factors like unit size, usage hours, electricity rates, and climate
                      Mini splits are usually cheaper to run than central AC because they provide efficient, zoned cooling without duct losses.

                      Reviews

                      Express Free Shipping

                      Process orders within 1-2 days

                      Stress Free Returns

                      Get Covered for (730 days) Returns

                      Premum Quality

                      Top Tier Products, Even Better Customer Care

                      5 Year Warranty

                      We Believe In Our Products & Our Team