HOT ! MRCOOL DIY 5th Gen 4-Zone 48,000 BTU 21.8 SEER2 (2×6K + 9K + 18K) Ductless Mini-Split Heat Pump System DIYM448HPW03D216

MRCOOL DIY 5th Gen 4-Zone 48,000 BTU 21.8 SEER2 (2×6K + 9K + 18K) Ductless Mini-Split Heat Pump System DIYM448HPW03D216

The MRCOOL DIY® 5th Gen Multi-Zone 4-Zone 48,000 BTU Ductless Mini-Split Heat Pump System is designed for homeowners who want powerful, energy-efficient comfort with the convenience of do-it-yourself installation. This system connects one outdoor condenser to four indoor air handlers, allowing independent temperature control across multiple rooms or zones. With a high efficiency rating of up to 21.8 SEER2, it delivers reliable heating and cooling while helping reduce energy consumption.

Equipped with DIY QuickConnect® pre-charged line sets, this system eliminates the need for specialized HVAC tools or professional installation. Advanced DC inverter technology ensures quiet operation and consistent performance, while the Gold Fin® corrosion-resistant coating enhances durability for long-term use. The system also supports smart control through the MRCOOL Smart HVAC Controller® App and voice assistants, providing flexible and convenient climate management year-round.

Features

• 48,000 BTU total system capacity


• 4 independently controlled comfort zones


• (2) 6K + (1) 9K + (1) 18K BTU indoor air handlers


• Up to 21.8 SEER2 high-efficiency rating


• DC inverter variable-speed compressor


• DIY® QuickConnect® pre-charged line sets


• Extended 25-ft line-set reach for flexible layouts


• DIYPRO® cable (no conduit required)


• Gold Fin® anti-corrosion protection


• Follow Me® temperature sensing


• MRCOOL® Smart HVAC Controller® App


• Amazon Alexa® & Google Home® compatibility


• AHRI certified

Specifications

What’s Included 

• ✔ 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) 25-ft DIY® QuickConnect® Line Sets (¼″ × ⅜″)


• ✔ (1) 25-ft DIY® QuickConnect® Line Set (¼″ × ½″)


• ✔ DIYPRO® communication cable


• ✔ Wireless remotes for each indoor unit


• ✔ Installation manuals & mounting hardware

Frequently Asked Questions (FAQ\'s)

Why choose 25-ft line sets instead of 16-ft?

They allow greater condenser placement flexibility for larger homes, garages, basements, or multi-story layouts.

Can each zone be controlled independently?

Yes. Each indoor unit operates with its own temperature, fan speed, and mode settings.

Is professional HVAC installation required?

No. This system is designed for true DIY installation—no refrigerant handling required.

Does this system support smart home control?

Yes. Fully compatible with Alexa®, Google Home®, and the MRCOOL® Smart HVAC Controller® App.

Is this system suitable for long-term daily use?

Absolutely. The DC inverter compressor adjusts output automatically to reduce energy usage and wear.