MRCOOL DIY 5th Gen 48,000 BTU 4‑Zone 21.5 SEER2 Ductless Mini Split Heat Pump System (6K + 6K + 9K + 24K)

MRCOOL DIY 5th Gen 48,000 BTU 4‑Zone 21.5 SEER2 Ductless Mini Split Heat Pump System (6K + 6K + 9K + 24K)

The MRCOOL DIY® 5th Gen 48,000 BTU 4‑Zone Ductless Mini Split Heat Pump System is a premium multi‑zone HVAC solution designed for homeowners who want zoned comfort across multiple rooms with true do‑it‑yourself installation. Powered by a 5th generation multi‑zone condenser and matched with four wall‑mounted indoor units — two 6,000 BTU, one 9,000 BTU, and one 24,000 BTU — this system provides balanced heating and cooling where you need it most. It’s ideal for larger living spaces, bedrooms, offices, bonus rooms, and open‑plan areas.

Installation is made simple with MRCOOL’s QuickConnect® design; the included pre‑charged line sets arrive sealed with R‑454B refrigerant so no vacuum pumps or refrigerant handling are required. The DIYPRO® communication cable removes the need for electrical conduit, helping speed up setup and improve long‑term reliability. With advanced DC inverter technology, this system delivers smooth, reliable performance with lower noise and improved energy efficiency.

Each indoor unit operates independently, giving you precise temperature control in every zone. Smart HVAC app support and compatibility with voice control systems allow remote access and seamless integration with modern smart home ecosystems. Durable construction with corrosion‑resistant outdoor components adds confidence in long‑term operation across seasons.

Backed by robust warranty coverage, including a 7‑year compressor warranty and 5‑year parts warranty, the MRCOOL DIY® 5th Gen multi‑zone system brings efficient, flexible, and homeowner‑friendly climate control to your property.

Features 

• 48,000 BTU total system capacity
• 4 independently controlled comfort zones
• (2) 6K + (1) 9K + (1) 24K indoor air handlers
• Up to 21.5 SEER2 efficiency
• DC inverter variable-speed compressor
• DIY® QuickConnect® pre-charged line sets
• 25-ft line sets for flexible layouts
• DIYPRO® cable – no conduit required
• Gold Fin® anti-corrosion protection
• Follow Me® temperature sensing
• Smartphone app control
• Alexa® & Google Home® compatible
• ENERGY STAR® & AHRI certified

Specifications

Dimensions & Weight

Warranty Coverage

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

What’s Included

• ✔ 48,000 BTU MRCOOL DIY® Multi-Zone Outdoor Condenser
• ✔ (2) 6,000 BTU Wall-Mounted Indoor Air Handlers
• ✔ (1) 9,000 BTU Wall-Mounted Indoor Air Handler
• ✔ (1) 24,000 BTU Wall-Mounted Indoor Air Handler
• ✔ (3) 25-ft DIY® QuickConnect® Line Sets (1/4 × 3/8)
• ✔ (1) 25-ft DIY® QuickConnect® Line Set (1/4 × 5/8)
• ✔ DIYPRO® communication cable
• ✔ Wireless remotes for each indoor unit
• ✔ Mounting plates & installation manuals

Smartphone not included.

Frequently Asked Questions (FAQ)

Can each zone be controlled independently?

Yes. Each indoor unit has its own remote and temperature control.

Is professional HVAC installation required?

No. This system is engineered specifically for true DIY installation.

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

They provide greater flexibility for condenser placement and multi-room layouts.

Does this system work in cold climates?

Yes. The inverter compressor delivers reliable heating even in low outdoor temperatures.

Is this system smart-home compatible?

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