MRCOOL DIY 5th Gen Mini Split - 6-Zone 55,000 BTU Ductless Air Conditioner and Heat Pump Condenser with 18K + 12K + 12K + 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 18K + 12K + 12K + 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 one 18K, two 12K and three 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

• Flexible Zoning Power – 55,000 BTU capacity with a mix of 18K, 12K, and 9K cassettes delivers tailored comfort across six different rooms.

• DIY Installation Ready – Comes with MRCOOL’s pre-charged No-Vac line sets for quick setup without special tools.

• Discreet Comfort – Ceiling cassette design provides quiet, even airflow while keeping walls and floors uncluttered.

• Year-Round Efficiency – Heat pump technology ensures reliable cooling in summer and efficient heating in colder months.

• Personalized Control – Each zone runs independently, giving homeowners maximum flexibility in managing comfort and energy savings.

Q&A

Q: Can I control each zone independently?
A: Yes — each cassette comes with its own control, allowing you to set different temperatures in every room.

Q: Is this system heating and cooling?
A: Yes, it’s a heat pump mini split, providing both year-round cooling and heating.

Q: Why choose a mixed-size zone setup?
A: Different BTU sizes let you match each room’s load requirement — ensuring efficient performance whether it’s a large living room or a smaller bedroom.

Q: Do I need professional installation?
A: Not necessarily. Thanks to the No-Vac pre-charged line sets, this is one of the only true DIY mini split systems on the market.

Maintenance Tips

• Clean or replace filters in each cassette every 1–2 months for steady airflow.

• Wipe cassette grilles and panels to minimize dust buildup.

• Inspect all condensate drain lines to prevent clogs and leaks.

• Verify the pre-charged line set connections for each zone remain secure.

• Keep the outdoor condenser clear of dirt, leaves, and obstructions.

• Test remote and smart control functions across all six zones.

• Arrange annual professional servicing to optimize performance and extend system life.