HOT ! MRCOOL DIY 5th Gen Multi‑Zone 4‑Zone 48,000 BTU 21.8 SEER2 (2×6K + 9K + 12K) Ductless Mini‑Split Air Conditioner & Heat Pump System DIYM448HPW02D00

MRCOOL DIY 5th Gen Multi‑Zone 4‑Zone 48,000 BTU 21.8 SEER2 (2×6K + 9K + 12K) Ductless Mini‑Split Air Conditioner & Heat Pump System DIYM448HPW02D00

Experience efficient, customizable comfort without the need for professional HVAC installation with the MRCOOL DIY® 5th Gen Multi‑Zone 4‑Zone 48,000 BTU Mini‑Split System. This advanced ductless heat pump system pairs a powerful 48,000 BTU multi‑zone condenser with a thoughtfully balanced set of two 6,000 BTU, one 9,000 BTU, and one 12,000 BTU indoor air handlers—perfect for homes with a mix of bedrooms, offices, medium‑sized living spaces, and more. Designed for room‑by‑room temperature control, this system offers up to four independently controlled zones, giving you personalized comfort where you need it most.

Installation is dramatically simplified thanks to MRCOOL’s patented QuickConnect® technology: each line set arrives factory‑sealed and pre‑charged with eco‑friendly R‑454B refrigerant, eliminating the need for vacuum pumps, gauges, or refrigerant licensing. The included DIYPRO® communication cable removes the need for electrical conduit, making this one of the most homeowner‑friendly multi‑zone HVAC systems on the market. Backed by advanced inverter technology, Gold Fin® corrosion protection, and smart home compatibility, it delivers quiet, efficient performance year‑round.

Control your comfort right from your smartphone with the MRCOOL Smart HVAC Controller® App or use voice commands through Amazon Alexa® and Google Home®. With ENERGY STAR® and AHRI certification, this system helps reduce energy costs while keeping your home comfortable in any season.

Features 

• 48,000 BTU total system capacity


• 4 independently controlled zones


• (2) 6K + (1) 9K + (1) 12K BTU air handlers


• 21.8 SEER2 high-efficiency rating


• DC inverter variable-speed compressor


• DIY® QuickConnect® pre-charged line sets


• No vacuum pump or refrigerant handling


• DIYPRO® cable (no conduit required)


• Gold Fin® anti-corrosion protection


• Follow Me® temperature sensing


• MRCOOL® Smart HVAC Controller® App


• Amazon Alexa® & Google Home® compatible


• ENERGY STAR® & 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) 12,000 BTU Wall-Mounted Indoor Air Handler


• ✔ (4) 16-ft DIY® QuickConnect® Line Sets (1/4 × 3/8)


• ✔ DIYPRO® communication cable


• ✔ Wireless remotes for each indoor unit


• ✔ Installation manuals & mounting hardware

Frequently Asked Questions (FAQ\'s)

Why mix 6K, 9K, and 12K air handlers?

This allows proper load matching for rooms of different sizes, improving comfort and efficiency.

Is this system really DIY?

Yes. No vacuuming, gauges, or licensed HVAC labor required.

Can each room be controlled independently?

Absolutely. Each zone has its own thermostat and remote.

Does it support smart control?

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