MRCOOL DIY 5th Gen 27K 2-Zone Mini Split System 9K + 12K R-454B Pre-Charged 25ft Line Sets DIY-MULTI4-27HP230D-O

MRCOOL DIY 5th Gen 27K 2-Zone Mini Split System 9K + 12K R-454B Pre-Charged 25ft Line Sets DIY-MULTI4-27HP230D-O

The MRCOOL DIY 5th Gen 27K 2-Zone Mini Split System is designed to provide versatile, energy-efficient cooling and heating for two separate areas in your home. Combining a 9,000 BTU and a 12,000 BTU indoor unit, this system delivers customizable comfort for living spaces of different sizes, making it ideal for bedrooms, offices, or multi-purpose rooms. Its DIY-friendly design allows homeowners to install the system without professional assistance, saving time and installation costs.

Engineered with R-454B refrigerant, this 2-zone mini split system offers high energy efficiency while reducing environmental impact. Each indoor unit operates independently, giving you precise temperature control in each zone. The pre-charged 25-foot line sets make installation faster and simpler, allowing for flexible placement of indoor units up to 25 feet away from the outdoor condenser.

The MRCOOL DIY system is built to last, with high-quality components that ensure durability and reliable performance year-round. With intuitive controls, you can easily switch between heating and cooling modes to maintain optimal comfort in any season. Quiet operation ensures minimal disruption, making it perfect for bedrooms, home offices, or entertainment spaces.

Whether you’re upgrading your current HVAC setup or installing a new system in a custom space, the MRCOOL DIY 5th Gen 2-Zone Mini Split provides a convenient, efficient, and cost-effective solution. Its innovative design and user-friendly installation make it an excellent choice for homeowners seeking flexibility, energy savings, and superior comfort.

Features

• 2-zone mini split system (9K + 12K BTU indoor units)

• DIY installation, no professional required

• Pre-charged 25 ft line sets included

• Uses environmentally friendly R-454B refrigerant

• Independent zone control for customized comfort

• Quiet operation for minimal disruption

• Energy-efficient design for cost savings

Specifications

 What’s Included 

• 1 × MRCOOL® 27K 5th Gen DIY Multi-Zone Condenser
  – Model: DIY-MULTI4-27HP230D-O
• 1 × 9k Wall Mount Air Handler
  – Model: DIY-09-HP-WMAH-230D25-O
• 1 × 12 Wall Mount Air Handler
  – Model: DIY-12-HP-WMAH-230D25-O
• 2 × 25 ft DIY® QuickConnect® Pre-Charged Line Sets
  – Model: DIY25-1438-O
• DIYPRO® communication cable
• Wireless remotes
• SmartHVAC WiFi/app capability
• Mounting hardware & installation manuals

Frequently Asked Questions (FAQ's)

Q: Do I need an HVAC license to install this?

No. The MRCOOL® DIY system is designed for homeowners. The QuickConnect® line sets are pre-charged and sealed from the factory. No vacuum pump or refrigerant handling is required.

Q: How many rooms can this system handle?

This bundle is set up for 2 zones (one 9k room and one 12k room). The condenser supports up to 4 zones total, so you can add more indoor units later if needed.

Q: What size rooms is this best for?

The 9k head is ideal for smaller rooms up to ~400 sq ft (office, small bedroom, nursery).

The 12k head works well in larger areas up to ~550 sq ft (living room, master bedroom, open plan).

Note could vary depending on ceiling height, windows, insulation and what state you are in.

Q: Are the line sets really pre-charged?

Yes. Both  25 ft DIY® QuickConnect® line sets arrive factory pre-charged with R-454B.

Q: Is this system energy efficient?

Yes. The condenser reaches up to 23 SEER2 and 9.5 HSPF2-4, which is much more efficient than older central systems, window units, or baseboard heating.

Q: Can I control it from my phone?

Yes. Use the SmartHVAC app (iOS and Android), plus Alexa and Google Assistant voice control.