MRCOOL® DIY 5th Gen Multi-Zone 6-Zone 48,000 BTU 21.5 SEER2 (6K + 6K + 9K + 18K), 4x 16ft line sets, Ductless Mini-Split Heat Pump System – Model DIYM448HPW03D00

Product Description 

Model: DIYM448HPW03D00

The MRCOOL® DIYM448HPW03D00 is a high-capacity, professionally balanced 6-zone ductless mini-split system engineered for homeowners who demand whole-home comfort, precise zoning, and long-term energy savings—all without paying for traditional HVAC labor.

This system is built around the MRCOOL® DIY® 5th Generation 48,000 BTU multi-zone condenser and paired with a carefully matched indoor configuration consisting of two 6,000 BTU units, one 9,000 BTU unit, and one 18,000 BTU unit. This layout allows you to properly size each room based on square footage and heat load, making it ideal for bedrooms, offices, nurseries, guest rooms, bonus rooms, and larger living areas—all on a single outdoor system.

Installation is simplified through MRCOOL®’s patented DIY® QuickConnect® technology. The included 16-foot pre-charged DIY® QuickConnect® line sets arrive factory sealed with R-454B refrigerant, eliminating the need for vacuum pumps, gauges, EPA refrigerant handling, or licensed HVAC labor. The DIYPRO® communication cable further reduces install time by removing the need for electrical conduit while improving reliability and weather resistance.

With DC inverter technology, Gold Fin® corrosion-resistant coils, and full MRCOOL® Smart HVAC Controller® integration, this system delivers quiet operation, lower utility bills, and dependable heating and cooling year-round—all with true DIY convenience.

KEY FEATURES & PERFORMANCE HIGHLIGHTS

• 48,000 BTU total system capacity
• 6 independently controlled comfort zones
• (2) 6K + (1) 9K + (1) 18K BTU indoor air handlers
• Up to 21.5 SEER2 high-efficiency rating
• DC inverter variable-speed compressor
• DIY® QuickConnect® pre-charged line sets
• 16-ft line sets included for clean, compact installs
• DIYPRO® cable – no conduit required
• Gold Fin® anti-corrosion coil protection
• Follow Me® temperature sensing
• MRCOOL® Smart HVAC Controller® App
• Amazon Alexa® & Google Home® compatibility
• AHRI certified

ELECTRICAL REQUIREMENTS & BREAKER INFORMATION

Outdoor Condenser — DIY-MULTI6-48HP230D-O

• Voltage: 208 / 230V
• Phase: Single-Phase
• Frequency: 60 Hz
• Minimum Circuit Ampacity (MCA): 40 Amps
• Maximum Breaker Size: 45 Amps
• Dedicated Circuit Required: Yes

DIMENSIONS & WEIGHT

Outdoor Condenser

• Width: 37.48 in
• Height: 52.48 in
• Depth: 16.34 in
• Net Weight: ~224 lbs

6K Indoor Air Handlers (each)

• Width: 31.57 in
• Height: 11.69 in
• Depth: 7.44 in
• Weight: ~24.5 lbs

9K Indoor Air Handler

• Width: 31.57 in
• Height: 11.69 in
• Depth: 7.44 in
• Weight: ~25 lbs

18K Indoor Air Handler

• Width: 41.73 in
• Height: 13.19 in
• Depth: 8.98 in
• Weight: ~35 lbs

WARRANTY COVERAGE

• 5-Year Parts Warranty
• 7-Year Compressor Warranty
• Eligible for the MRCOOL® Care Kit Program

WHAT’S INCLUDED IN THIS BUNDLE

• ✔ MRCOOL® DIY® 48,000 BTU Multi-Zone Outdoor Condenser
• ✔ (2) 6,000 BTU Wall-Mounted Indoor Air Handlers
• ✔ (1) 9,000 BTU Wall-Mounted Indoor Air Handler
• ✔ (1) 18,000 BTU Wall-Mounted Indoor Air Handler
• ✔ (3) 16-ft DIY® QuickConnect® Line Sets (¼″ × ⅜″)
• ✔ (1) 16-ft DIY® QuickConnect® Line Set (¼″ × ½″)
• ✔ DIYPRO® communication cable
• ✔ Wireless remotes for each indoor unit
• ✔ Installation manuals & mounting hardware

Smartphone not included.

FREQUENTLY ASKED QUESTIONS (FAQ)

Can each zone be controlled independently?

Yes. Every indoor air handler operates independently with its own remote, temperature setpoint, and fan speed.

Is professional HVAC installation required?

No. This system is specifically designed for true homeowner DIY installation.

Are the line sets pre-charged with refrigerant?

Yes. All included line sets are factory sealed and pre-charged with R-454B refrigerant.

Can I add smart controls later?

Yes. The system supports the MRCOOL® Smart HVAC Controller® App and voice control through Alexa® and Google Home®.

Is this system suitable for cold climates?

Yes. The 5th Gen DIY platform provides reliable heating performance in low outdoor temperatures.

WHY BUY FROM MRCOOL DIRECT

When you order from MRCOOL DIRECT, you get:

• ✅ Authorized MRCOOL® dealer – warranty fully protected
• ✅ Factory-fresh equipment – no refurbished units
• ✅ Fast U.S. shipping – most orders ship in 1–3 business days
• ✅ Financing options available
• ✅ Real product support – sizing, line sets & DIY help
• ✅ No marketplace middlemen

MRCOOL Direct also offers Extended Warranty options (sold separately).

That include labor and refrigeration warranty!

BUY DIRECT – FAMILY-OWNED SUPPORT

Questions? Need help sizing?

Call anytime: 615-553-8118

Family-friendly HVAC help is always just a phone call away.

MRCOOL DIRECT – USA’s #1 MRCOOL® Authentication Dealer

Buying from MRCOOL DIRECT means accuracy, warranty protection, and long-term support.

So Purchase with Confidence!