Skip to content

MRCOOL DIY Mini Split - 51,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09090924

SKU DIY-B-448HP09090924
by MRCOOL
Authorized Dealer Official
100% Authentic Guarantee
In stock, ready to ship

Fast shipping icon FREE EXPRESS SHIPPING: Process orders in 1 business day

Returns icon STRESS FREE RETURNS: 2 Year Returns

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

Warranty icon 5 YEAR WARRANTY: We Believe In Our Products & Our Team

Professional installation icon PROFESSIONAL INSTALLATION: Get connected with certified, licensed installers in your area - Request installer quotes

$6,949.60

Notify me when back in stock

Estimated Shipping Widget will be displayed here!

Sticky Add to Cart Button
Description

MRCOOL DIY Mini Split - 51,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump (Model: DIY-B-448HP09090924)

For HVAC business owners and contractors looking to deliver top-tier comfort solutions with minimal hassle, the MRCOOL DIY Mini Split 51,000 BTU 4 Zone system is a game-changer. Designed to provide powerful, customizable climate control across multiple rooms, this system blends cutting-edge technology with effortless DIY installation—letting you satisfy more customers while streamlining your workflow.

Visualize Total Comfort, Zone by Zone

Imagine offering your clients the ability to control temperatures in four distinct zones, perfectly matched to their unique spaces and lifestyles. This system includes air handlers sized for small to large areas: two 9,000 BTU units ideal for cozy rooms between 180 and 375 square feet, and two 24,000 BTU units built for expansive spaces up to 1,000 square feet. Each zone operates independently with versatile modes like COOL, HEAT, AUTO, DRY, and SLEEP, creating tailored comfort for every corner of the home, garage, or workshop.

Installation Made Simple — No Experts Needed

The patented Pre-Charged Quick Connect Line Sets are the heart of MRCOOL’s DIY innovation. They eliminate the need for vacuum pumps, refrigerant handling, and complex tools, making installation straightforward and fast. Lightweight, compact air handlers simplify mounting, so you can complete jobs quicker, reduce labor costs, and increase project volume. This system empowers you to take control of installations without sacrificing quality or reliability.

Built for Durability and Efficiency

The 48,000 BTU condenser is coated with Gold Fin® technology, protecting it from corrosion and extending its lifespan. With an impressive 20.5 SEER2 and 8.5 HSPF-5 rating, this system delivers outstanding energy efficiency—helping your customers save on utility bills while enjoying year-round comfort. It’s also winter-ready, maintaining reliable heating performance even when temperatures drop to 5°F outside.

Smart Control for Modern Living

Your customers can effortlessly adjust their comfort settings from anywhere using the SmartHVAC app. This remote control capability adds convenience and modern appeal, making your installation even more attractive to today’s connected homeowners and business operators.

Why Choose the MRCOOL DIY 51,000 BTU 4 Zone System?
  • Four air handlers tailored for small to large rooms, ensuring precise zone control
  • DIY-friendly installation with patented Pre-Charged Quick Connect Line Sets—no vacuum pumps or refrigerant handling needed
  • Durable Gold Fin® coated condenser for long-lasting performance
  • High energy efficiency (20.5 SEER2 / 8.5 HSPF-5) to reduce operating costs
  • Reliable heating down to 5°F outdoor temperature
  • SmartHVAC app compatibility for remote system management
  • Comprehensive 7-year compressor and 5-year parts warranty

By offering the MRCOOL DIY Mini Split 51,000 BTU 4 Zone system, you provide your customers with an advanced, flexible, and energy-efficient HVAC solution that’s easy to install and even easier to enjoy—helping you grow your business with every successful installation.

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 (24K BTU)

  • Versatile Climate Control: Switch easily between COOL, HEAT, AUTO, DRY, or SLEEP modes for comfort that meets all seasons and conditions.
  • Perfect Room Coverage: Ideal for spaces ranging from 751 to 1,000 square feet, making it a reliable choice for expansive rooms.
  • Smart Control Anywhere: Manage your system effortlessly using the SmartHVAC app compatibility.
  • Effortless Installation: Lightweight and compact, this design allows a streamlined installation process.
  • Quick Connect System: With the MRCOOL Pre-Charged Quick Connect Line Set, install with ease—no technical expertise required!
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 + 9k + 9k + 24k

  • 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 - 51,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump (Model: DIY-B-448HP09090924)

For HVAC business owners and contractors looking to deliver top-tier comfort solutions with minimal hassle, the MRCOOL DIY Mini Split 51,000 BTU 4 Zone system is a game-changer. Designed to provide powerful, customizable climate control across multiple rooms, this system blends cutting-edge technology with effortless DIY installation—letting you satisfy more customers while streamlining your workflow.

Visualize Total Comfort, Zone by Zone

Imagine offering your clients the ability to control temperatures in four distinct zones, perfectly matched to their unique spaces and lifestyles. This system includes air handlers sized for small to large areas: two 9,000 BTU units ideal for cozy rooms between 180 and 375 square feet, and two 24,000 BTU units built for expansive spaces up to 1,000 square feet. Each zone operates independently with versatile modes like COOL, HEAT, AUTO, DRY, and SLEEP, creating tailored comfort for every corner of the home, garage, or workshop.

Installation Made Simple — No Experts Needed

The patented Pre-Charged Quick Connect Line Sets are the heart of MRCOOL’s DIY innovation. They eliminate the need for vacuum pumps, refrigerant handling, and complex tools, making installation straightforward and fast. Lightweight, compact air handlers simplify mounting, so you can complete jobs quicker, reduce labor costs, and increase project volume. This system empowers you to take control of installations without sacrificing quality or reliability.

Built for Durability and Efficiency

The 48,000 BTU condenser is coated with Gold Fin® technology, protecting it from corrosion and extending its lifespan. With an impressive 20.5 SEER2 and 8.5 HSPF-5 rating, this system delivers outstanding energy efficiency—helping your customers save on utility bills while enjoying year-round comfort. It’s also winter-ready, maintaining reliable heating performance even when temperatures drop to 5°F outside.

Smart Control for Modern Living

Your customers can effortlessly adjust their comfort settings from anywhere using the SmartHVAC app. This remote control capability adds convenience and modern appeal, making your installation even more attractive to today’s connected homeowners and business operators.

Why Choose the MRCOOL DIY 51,000 BTU 4 Zone System?
  • Four air handlers tailored for small to large rooms, ensuring precise zone control
  • DIY-friendly installation with patented Pre-Charged Quick Connect Line Sets—no vacuum pumps or refrigerant handling needed
  • Durable Gold Fin® coated condenser for long-lasting performance
  • High energy efficiency (20.5 SEER2 / 8.5 HSPF-5) to reduce operating costs
  • Reliable heating down to 5°F outdoor temperature
  • SmartHVAC app compatibility for remote system management
  • Comprehensive 7-year compressor and 5-year parts warranty

By offering the MRCOOL DIY Mini Split 51,000 BTU 4 Zone system, you provide your customers with an advanced, flexible, and energy-efficient HVAC solution that’s easy to install and even easier to enjoy—helping you grow your business with every successful installation.

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 (24K BTU)

  • Versatile Climate Control: Switch easily between COOL, HEAT, AUTO, DRY, or SLEEP modes for comfort that meets all seasons and conditions.
  • Perfect Room Coverage: Ideal for spaces ranging from 751 to 1,000 square feet, making it a reliable choice for expansive rooms.
  • Smart Control Anywhere: Manage your system effortlessly using the SmartHVAC app compatibility.
  • Effortless Installation: Lightweight and compact, this design allows a streamlined installation process.
  • Quick Connect System: With the MRCOOL Pre-Charged Quick Connect Line Set, install with ease—no technical expertise required!
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

Request an Installer

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 - 51,000 BTU 4 Zone Ductless Air Conditioner and Heat Pump, DIY-B-448HP09090924

Most Frequently Asked Questions

Yes, Mr. Cool DIY mini splits are generally considered good, as they offer reliable performance, energy efficiency, and are designed for easy self-installation by homeowners.
A MRCOOL mini split typically lasts 10 to 20 years with proper installation and regular maintenance.
The average cost to install a 4-zone mini-split system is typically between $8,000 and $12,000, depending on factors like brand, system size, labor, and installation complexity

Other Questions

The monthly cost to run a mini split typically ranges from $30 to $80, depending on factors like system size, usage hours, electricity rates, and climate
It's generally more energy-efficient to leave your mini split running continuously at a moderate temperature during summer rather than turning it off and on frequently, because mini splits use inverter technology to adjust cooling output smoothly and avoid energy spikes from restarting. However, if you’ll be away for an extended period, turning it off can save energy.

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