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MRCOOL DIY Mini Split - 45,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09121212

SKU DIY-B-448HP09121212
by MRCOOL
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Description

MRCOOL DIY Mini Split - 45,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09121212

Step into a new era of comfort and convenience with the MRCOOL DIY Mini Split 45,000 BTU 4 Zone system—designed with the installer and end-user in mind. This cutting-edge 4th Generation system delivers powerful, customizable climate control for multiple rooms, all while making installation straightforward and hassle-free. Whether you’re outfitting a home, garage, workshop, or commercial space, this system puts you in full control of comfort, efficiency, and ease.

Powerful, Precise Climate Control Across Four Zones

Imagine providing your customers with tailored comfort in every corner of their space. This system features four air handlers split between two sizes to perfectly match room requirements:

  • 9,000 BTU Air Handlers are ideal for smaller rooms from 180 to 375 square feet—think bedrooms, cozy offices, or snug workshops.
  • 12,000 BTU Air Handlers cover medium-sized spaces ranging from 376 to 500 square feet, perfect for living rooms, larger work areas, or open-plan offices.

Each air handler offers versatile modes including COOL, HEAT, AUTO, DRY, and SLEEP, ensuring year-round comfort that adapts to every lifestyle and season.

Installation Made Simple — No Professional Tools Needed

Thanks to MRCOOL’s patented Pre-Charged Quick Connect Line Sets, you can say goodbye to complicated refrigerant handling, vacuum pumps, and specialized tools. The lightweight, compact air handlers mount quickly and connect effortlessly, empowering you to complete installations faster and more efficiently. This DIY-ready design not only saves time but also reduces labor costs—helping your business grow while delivering premium comfort solutions.

Built to Last and Save Energy

At the heart of the system is a robust 48,000 BTU condenser, protected with Gold Fin® coating to resist corrosion and wear, ensuring long-lasting durability. With an impressive 20.5 SEER2 and 8.5 HSPF-5 rating, this unit offers outstanding energy efficiency, translating into significant savings on utility bills for your customers. Plus, it’s winter-ready—providing reliable heating even when outdoor temperatures drop to as low as 5°F.

Smart Control at Your Fingertips

Take convenience to the next level with SmartHVAC app compatibility. Your customers can control every zone remotely, adjusting temperatures and settings from anywhere in the world. This modern feature adds tremendous value to your installations, satisfying today’s tech-savvy users who demand comfort and control anytime, anywhere.

Why Choose the MRCOOL DIY 45,000 BTU 4 Zone System?
  • Four air handlers sized for small to medium rooms, delivering precise, zone-specific comfort
  • DIY installation with patented Pre-Charged Quick Connect Line Sets—no vacuum pumps or refrigerant handling required
  • Durable Gold Fin® coated condenser for extended system life
  • High energy efficiency (20.5 SEER2 / 8.5 HSPF-5) to reduce operating costs
  • Reliable heating performance down to 5°F outdoor temperature
  • SmartHVAC app compatibility for seamless remote control
  • Comprehensive 7-year compressor and 5-year parts warranty

With the MRCOOL DIY Mini Split 45,000 BTU 4 Zone system, you’re not just installing HVAC equipment—you’re delivering a complete, flexible comfort solution that elevates any space and grows your business with every project.

Condenser (48K BTU)

  • Streamlined Installation: Take control with MRCOOL’s patented Pre-Charged Quick Connect Line Sets, making installation a breeze without the need for professional assistance.
  • Resilient Protection: Stay safeguarded against wear with the Gold Fin® condenser coating.
  • Unmatched Efficiency: Enjoy remarkable energy savings with a 20.5 SEER2 and 8.5 HSPF-5 rating.
  • Winter-Ready: Generate warmth reliably, even when outdoor temperatures reach as low as 5°F.
  • Comprehensive Warranty: Benefit from a 7-year compressor warranty and a 5-year parts warranty.

Air Handler (9K BTU)

  • Versatile Climate Control: Whether you're in the mood for COOL, HEAT, AUTO, DRY, or SLEEP, these Air Handlers ensure comfort year-round.
  • Perfect Room Coverage: Optimized for spaces ranging from 180 to 375 square feet, perfect for smaller spaces and cozy corners.
  • Smart Control Anywhere: Take command with SmartHVAC app compatibility, offering fingertip convenience from anywhere on the planet.
  • Effortless Installation: The compact and lightweight design makes mounting quick and simple, minimizing installation efforts.
  • Quick Connect System: With MRCOOL’s Pre-Charged Quick Connect Line Set, you can set up easily—no vacuuming or complex tools required!

Air Handler (12K BTU)

  • Versatile Climate Control: Enjoy personalized comfort with COOL, HEAT, AUTO, DRY, or SLEEP modes to suit any season or preference.
  • Perfect Room Coverage: Tailored for areas ranging from 376 to 500 square feet, ideal for medium-sized spaces.
  • Smart Control Anywhere: Take advantage of SmartHVAC app compatibility, giving you complete control remotely.
  • Effortless Installation: A compact and lightweight design allows for hassle-free mounting and setup.
  • Quick Connect System: Thanks to the MRCOOL Pre-Charged Quick Connect Line Set, installation is incredibly simple—no professional vacuuming needed!
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: 4 Zone

  • Air Handler BTU:

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

  • 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 & 5-year parts warranty

Description

MRCOOL DIY Mini Split - 45,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09121212

Step into a new era of comfort and convenience with the MRCOOL DIY Mini Split 45,000 BTU 4 Zone system—designed with the installer and end-user in mind. This cutting-edge 4th Generation system delivers powerful, customizable climate control for multiple rooms, all while making installation straightforward and hassle-free. Whether you’re outfitting a home, garage, workshop, or commercial space, this system puts you in full control of comfort, efficiency, and ease.

Powerful, Precise Climate Control Across Four Zones

Imagine providing your customers with tailored comfort in every corner of their space. This system features four air handlers split between two sizes to perfectly match room requirements:

  • 9,000 BTU Air Handlers are ideal for smaller rooms from 180 to 375 square feet—think bedrooms, cozy offices, or snug workshops.
  • 12,000 BTU Air Handlers cover medium-sized spaces ranging from 376 to 500 square feet, perfect for living rooms, larger work areas, or open-plan offices.

Each air handler offers versatile modes including COOL, HEAT, AUTO, DRY, and SLEEP, ensuring year-round comfort that adapts to every lifestyle and season.

Installation Made Simple — No Professional Tools Needed

Thanks to MRCOOL’s patented Pre-Charged Quick Connect Line Sets, you can say goodbye to complicated refrigerant handling, vacuum pumps, and specialized tools. The lightweight, compact air handlers mount quickly and connect effortlessly, empowering you to complete installations faster and more efficiently. This DIY-ready design not only saves time but also reduces labor costs—helping your business grow while delivering premium comfort solutions.

Built to Last and Save Energy

At the heart of the system is a robust 48,000 BTU condenser, protected with Gold Fin® coating to resist corrosion and wear, ensuring long-lasting durability. With an impressive 20.5 SEER2 and 8.5 HSPF-5 rating, this unit offers outstanding energy efficiency, translating into significant savings on utility bills for your customers. Plus, it’s winter-ready—providing reliable heating even when outdoor temperatures drop to as low as 5°F.

Smart Control at Your Fingertips

Take convenience to the next level with SmartHVAC app compatibility. Your customers can control every zone remotely, adjusting temperatures and settings from anywhere in the world. This modern feature adds tremendous value to your installations, satisfying today’s tech-savvy users who demand comfort and control anytime, anywhere.

Why Choose the MRCOOL DIY 45,000 BTU 4 Zone System?
  • Four air handlers sized for small to medium rooms, delivering precise, zone-specific comfort
  • DIY installation with patented Pre-Charged Quick Connect Line Sets—no vacuum pumps or refrigerant handling required
  • Durable Gold Fin® coated condenser for extended system life
  • High energy efficiency (20.5 SEER2 / 8.5 HSPF-5) to reduce operating costs
  • Reliable heating performance down to 5°F outdoor temperature
  • SmartHVAC app compatibility for seamless remote control
  • Comprehensive 7-year compressor and 5-year parts warranty

With the MRCOOL DIY Mini Split 45,000 BTU 4 Zone system, you’re not just installing HVAC equipment—you’re delivering a complete, flexible comfort solution that elevates any space and grows your business with every project.

Condenser (48K BTU)

  • Streamlined Installation: Take control with MRCOOL’s patented Pre-Charged Quick Connect Line Sets, making installation a breeze without the need for professional assistance.
  • Resilient Protection: Stay safeguarded against wear with the Gold Fin® condenser coating.
  • Unmatched Efficiency: Enjoy remarkable energy savings with a 20.5 SEER2 and 8.5 HSPF-5 rating.
  • Winter-Ready: Generate warmth reliably, even when outdoor temperatures reach as low as 5°F.
  • Comprehensive Warranty: Benefit from a 7-year compressor warranty and a 5-year parts warranty.

Air Handler (9K BTU)

  • Versatile Climate Control: Whether you're in the mood for COOL, HEAT, AUTO, DRY, or SLEEP, these Air Handlers ensure comfort year-round.
  • Perfect Room Coverage: Optimized for spaces ranging from 180 to 375 square feet, perfect for smaller spaces and cozy corners.
  • Smart Control Anywhere: Take command with SmartHVAC app compatibility, offering fingertip convenience from anywhere on the planet.
  • Effortless Installation: The compact and lightweight design makes mounting quick and simple, minimizing installation efforts.
  • Quick Connect System: With MRCOOL’s Pre-Charged Quick Connect Line Set, you can set up easily—no vacuuming or complex tools required!

Air Handler (12K BTU)

  • Versatile Climate Control: Enjoy personalized comfort with COOL, HEAT, AUTO, DRY, or SLEEP modes to suit any season or preference.
  • Perfect Room Coverage: Tailored for areas ranging from 376 to 500 square feet, ideal for medium-sized spaces.
  • Smart Control Anywhere: Take advantage of SmartHVAC app compatibility, giving you complete control remotely.
  • Effortless Installation: A compact and lightweight design allows for hassle-free mounting and setup.
  • Quick Connect System: Thanks to the MRCOOL Pre-Charged Quick Connect Line Set, installation is incredibly simple—no professional vacuuming needed!
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

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  • ✓ Pre-Vetted, Licensed & Insured Installers
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  • ✓ 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!"
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Frequently Asked Questions about MRCOOL DIY Mini Split - 45,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09121212

Most Frequently Asked Questions

Yes, Mr. Cool DIY mini splits are generally considered good for their easy installation, solid efficiency, and reliable performance, making them a popular choice for homeowners seeking a cost-effective, do-it-yourself solution.
A MRCOOL mini split will typically last 12 to 20 years with proper installation and regular maintenance.
The cost to install a MRCOOL mini split system typically ranges from $2,500 to $6,000 for most residential applications, depending on system size, number of zones, and whether you choose DIY or professional installation.

Other Questions

Running a mini split typically costs $30 to $150 per month, depending on the unit’s size, efficiency, usage habits, and local electricity rates.
It’s usually more energy efficient to turn your mini split off or set it to a higher temperature when you’re away rather than leaving it on all the time in summer, since mini splits cool rooms quickly and adjusting usage can save energy and reduce costs.

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