4th Gen 5-Zone Ceiling Cassette Mini Split System – MRCOOL DIY 48K BTU (R-410A)

5-Zone Ceiling Cassette Mini Split System – MRCOOL DIY Gen 4 R-410A (48,000 BTU)

The MRCOOL DIY Gen 4 5-Zone Ceiling Cassette Mini Split System delivers powerful whole-home comfort with a clean, built-in appearance and true DIY installation. Built around R-410A refrigerant, this system is one of the last available multi-zone MRCOOL packages using the proven Gen 4 platform, known for durability, performance stability, and installer-friendly design.

With 48,000 BTU of total capacity, five independently controlled ceiling cassettes, and factory pre-charged quick-connect line sets, this system is ideal for homeowners and professionals who want premium comfort without the cost or complexity of traditional ducted HVAC.

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Why Choose the MRCOOL DIY Gen 4 5-Zone System?

✅ Proven MRCOOL Reliability

The 4th Generation DIY series has a long, real-world track record for dependable heating and cooling performance across residential and light commercial applications.

✅ True DIY Installation

All included line sets are factory pre-charged with R-410A and feature MRCOOL’s Quick-Connect fittings — no vacuum pump, no refrigerant handling, no gauges, and no HVAC license required.

✅ Discreet Ceiling Cassette Design

Flush-mounted ceiling cassettes provide even 360° air distribution, whisper-quiet operation, and a modern, built-in look that blends seamlessly into any space.

✅ Whole-Home, Multi-Room Comfort

Independently control up to five separate zones, each with its own temperature settings for personalized comfort throughout your home or workspace.

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System Configuration & Components

Outdoor Condenser

• 48,000 BTU 5-Zone MRCOOL DIY Gen 4 Condenser

• Model: DIY-MULTI5-48HP230C

• Inverter-driven heat pump technology for efficient heating and cooling

• Supports up to five indoor units simultaneously

Indoor Ceiling Cassette Units

• (4) 9,000 BTU Ceiling Cassettes

  • Model: DIYCASSETTE09HP-230C25

  • Ideal for bedrooms, offices, guest rooms, and smaller living areas

• (1) 18,000 BTU Ceiling Cassette

  • Model: DIYCASSETTE18HP-230C25

  • Perfect for open living rooms, master suites, and larger common areas

Pre-Charged R-410A Line Sets (Quick-Connect)

• (2) 16 ft Line Sets – 1/4" x 1/2"

  • Model: DIY16-1412

• (1) 25 ft Line Set – 1/4" x 1/2"

  • Model: DIY25-1412

• (2) 50 ft Line Sets – 1/4" x 1/2"

  • Model: DIY50-1412-C

Every line set arrives factory sealed and pre-charged, making installation faster, cleaner, and safer.

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Comfort, Performance & Efficiency

• High-efficiency Gen 4 inverter heat pump technology

• Year-round heating, cooling, and dehumidification

• Mixed cassette sizes (9K + 18K) for precise room-by-room comfort

• Whisper-quiet indoor operation — ideal for bedrooms and offices

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DIY-Friendly by Design

• No vacuum pump required

• No refrigerant handling

• No specialized HVAC tools

• Designed for confident DIY homeowners or contractors looking to save labor time

• Ceiling cassette design delivers a professional, built-in finish without ductwork

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Smart Controls & Convenience

• Compatible with MRCOOL smart controls (where supported)

• App-based control for remote temperature management

• Works with Amazon Alexa and Google Assistant (with compatible accessories)

• Advanced comfort modes including Sleep Mode, Auto Fan, and Dehumidification

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Ideal Applications

This 5-zone ceiling cassette mini split system is perfect for:

• Large homes and multi-story residences

• Workshops, garages, and shops

• Offices, studios, and professional spaces

• Finished basements, additions, and in-law suites

• Small commercial spaces needing multiple independently controlled zones

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Clean Design. Proven Performance. DIY Simplicity.

The MRCOOL DIY Gen 4 5-Zone Ceiling Cassette System delivers discreet aesthetics, powerful multi-zone comfort, and one of the easiest installation experiences available in a ceiling-mounted mini split system. If you want a clean, built-in look with true DIY convenience and R-410A reliability, this system is a rare and outstanding choice.

👉 Available now at MRCOOL DIY Direct – while supplies last.