MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 9K + 9K + 9K + 9K Ceiling Cassette Air Handlers

MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 12K + 12K + 9K + 9K + 9K + 9K Ceiling Cassette Air Handlers

Take control of your home’s comfort with the MRCOOL® 5th Gen DIY® Multi-Zone Mini Split System — the ultimate solution for efficient, customizable, and true DIY-friendly heating and cooling.

This powerful 55K 6-Zone system includes two 12K and four 9K ceiling cassette air handlers.

Features

• Customize mini-split system: choose the perfect line set length for each zone just above the “Add to Cart” button.
• Ultra-Efficient Cooling & Heating: Enjoy up to 22 SEER2 and 10.6 HSPF2-4 for energy-efficient year-round comfort.
• Low-Profile Ceiling Cassette Design: Flush-mounted unit fits between standard ceiling joists for a clean, built-in look.
• DIY-Friendly QuickConnect® Installation: No vacuuming or professional tools needed — pre-charged line sets make setup fast and simple.
• Smart Voice & App Control: Full control via SmartHVAC app, Alexa, Google Assistant, or included wireless remote.
• Eco-Conscious Refrigerant: Uses R-454B refrigerant with a low environmental impact.
• Industry-Leading Warranty: Includes 5-year parts, 7-year compressor, and lifetime replacement with MRCOOL® Care registration.

What our Experts Think

• Balanced Multi-Room Comfort – 55,000 BTU capacity with a mix of 12K and 9K ceiling cassettes, ideal for medium to small rooms across six zones.

• DIY-Friendly Setup – Pre-charged No-Vac line sets make installation fast and simple without specialized tools.

• Discreet Ceiling Design – OuttaSight cassettes blend into ceilings for quiet, space-saving air distribution.

• Efficient Heating & Cooling – Inverter heat pump technology provides reliable year-round performance with lower energy use.

• Independent Zoning – Each cassette operates separately, giving homeowners precise comfort control and energy savings in every room.

Q&A

Q: What is the total coverage area for this system?
A: It can cover up to 3,300 sq. ft., depending on insulation quality, ceiling height, and local climate.

Q: Does each room have independent temperature control?
A: Yes — each cassette can be controlled individually, allowing for custom comfort settings in every zone.

Q: Can this system heat as well as cool?
A: Yes, it is a heat pump system, meaning it provides both energy-efficient cooling in summer and heating in winter.

Q: Is this a DIY-friendly installation?
A: Absolutely. MRCOOL’s No-Vac pre-charged line sets make it one of the only true DIY ductless mini split systems available.

Q: Why choose this configuration (12K + 12K + 9K + 9K + 9K + 9K)?
A: It’s designed for homes with multiple small to medium rooms, ensuring each area gets the right amount of cooling and heating capacity.

Maintenance Tips

• Clean or replace filters in all six ceiling cassettes every 1–2 months to maintain airflow.

• Wipe cassettes and vents regularly to reduce dust buildup.

• Inspect condensate drain lines in each zone to prevent clogs and leaks.

• Confirm pre-charged line set connections are secure and leak-free.

• Keep the outdoor condenser free of debris, leaves, and obstructions.

• Test remote and smart control functions across all zones for proper operation.

• Schedule annual professional servicing to ensure energy efficiency and extend system lifespan.