HOT ! MRCOOL DIY 5th Gen 48,000 BTU 4‑Zone 21.8 SEER2 Ductless Mini Split Air Conditioner & Heat Pump System

MRCOOL DIY 5th Gen 48,000 BTU 4‑Zone 21.8 SEER2 Ductless Mini Split Air Conditioner & Heat Pump System

Experience year‑round comfort and energy savings with the MRCOOL DIY 5th Gen 48,000 BTU 4‑Zone Ductless Mini Split System, engineered for optimal efficiency and true DIY installation. This multi‑zone system delivers powerful heating and cooling for up to four separate rooms, making it an excellent solution for homes, offices, or multi‑space environments that require independent climate control without the cost and complexity of professional HVAC installation. With its innovative Quick‑Connect® pre‑charged line sets, you can complete installation quickly and confidently without needing vacuum pumps, refrigerant handling tools, or licensed technicians.

Built around MRCOOL’s advanced 5th Generation technology, this system provides up to 21.8 SEER2 efficiency, helping lower utility bills while maintaining exceptional comfort. The condenser’s DC inverter compressor adapts to changing temperature demands smoothly and quietly, and the SmartHVAC™ Wi‑Fi control lets you manage your comfort from your smartphone or integrate voice control with Alexa or Google Assistant. Whether it’s cooling in the summer or heating in the winter, this system brings reliable performance and personalized comfort to every zone.

Features

• 48,000 BTU total system capacity


• 4 independently controlled zones


• Three 6,000 BTU zones + one 18,000 BTU zone


• 21.8 SEER2 high-efficiency rating


• DC inverter variable-speed compressor


• DIY® QuickConnect® pre-charged line sets


• No vacuum pump or HVAC license required


• DIYPRO® cable (no conduit needed)


• Gold Fin® anti-corrosion coating


• Follow Me® temperature sensing


• MRCOOL® Smart HVAC Controller® App


• Amazon Alexa® & Google Home® compatibility


• ENERGY STAR® & AHRI certified

Specifications

What’s Included

• ✔ MRCOOL® DIY® 48,000 BTU Multi-Zone Outdoor Condenser


• ✔ (3) 6,000 BTU Wall-Mounted Indoor Air Handlers


• ✔ (1) 18,000 BTU Wall-Mounted Indoor Air Handler


• ✔ (3) 16-ft DIY® QuickConnect® Line Sets (1/4 × 3/8) — for 6K air handlers


• ✔ (1) 16-ft DIY® QuickConnect® Line Set (1/4 × 1/2) — for 18K air handler


• ✔ DIYPRO® communication cable


• ✔ Wireless remotes for each zone


• ✔ Installation manuals & mounting hardware

Frequently Asked Questions (FAQ\'s)

Is this a true DIY system?

Yes. MRCOOL® DIY® QuickConnect® technology eliminates vacuuming and refrigerant charging.

Can each room be controlled independently?

Yes. Each indoor unit has its own thermostat and remote.

Why mix 6K and 18K air handlers?

This allows precise sizing for small rooms while delivering higher output for larger shared spaces.

Does this system work with smart home platforms?

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