MRCOOL® 27K 4-Zone DIY® Mini Split System with three 6K Air Handlers & 25ft QuickConnect® Line Sets- R-454B- DIYM327HPW00D21

Product Description 

Model: DIYM327HPW00D21

The MRCOOL® DIYM327HPW00D21 is a top-tier 27,000 BTU multi-zone DIY® mini split system engineered for homeowners who want professional-grade comfort, long-term efficiency, and full control—without hiring an HVAC contractor.

This bundle is built around MRCOOL’s proven DIY® platform, combining a 27K 4-zone outdoor condenser with three 6,000 BTU wall-mounted air handlers. Each indoor unit is paired with a 25-foot pre-charged DIY® QuickConnect® line set, giving you maximum flexibility for longer or more complex installs while maintaining factory-sealed reliability.

Using R-454B refrigerant, DC inverter technology, and a Gold Fin® corrosion-resistant coil, this system delivers whisper-quiet performance, lower energy bills, and dependable comfort year-round. Control everything through the MRCOOL® Smart HVAC Controller®, the mobile app, or hands-free voice control using Amazon Alexa or Google Assistant.

This is a true DIY® multi-room solution—built to last, easy to install, and designed to outperform traditional contractor-installed systems

27K MRCOOL® DIY® MULTI-ZONE CONDENSER

Model: DIY-MULTI4-27HP230D-O

The heart of this bundle is the MRCOOL® DIY® 27K 4-zone condenser, capable of independently managing up to four indoor zones with precision inverter control.

Key Highlights

• Supports up to 4 zones
• High-efficiency SEER2-rated performance
• DC inverter compressor for smooth, quiet operation
• Factory-sealed DIY® QuickConnect® ports
• Gold Fin® outdoor coil for coastal & high-humidity protection
• ENERGY STAR® & AHRI Certified

Electrical Requirements

• Minimum Circuit Ampacity: 20A
• Maximum Fuse / Breaker: 25A

️ THREE 6K DIY® WALL-MOUNT AIR HANDLERS

Model: DIY-06-HP-WMAH-230D25-O

This bundle includes three 6,000 BTU indoor units, perfect for bedrooms, offices, nurseries, guest rooms, or studios up to ~200 sq. ft. each.

Features

• Follow Me® technology for accurate comfort at the remote
• Dry Mode for humidity control
• Ultra-quiet operation
• Multiple fan speeds + auto mode
• Washable air filters
• Full control via remote, app, or voice

Each zone operates independently, allowing different temperatures in every room for maximum efficiency and comfort.

THREE 25-FT DIY® QUICKCONNECT® LINE SETS

Model: DIY25-1438-O

This bundle upgrades you to three 25-foot line sets, ideal when indoor units are farther from the condenser.

Line Set Details

• 25 ft length for extended installs
• Factory-sealed R-454B refrigerant
• DIY® QuickConnect® fittings
• Integrated DIYPRO® cable
• No vacuuming, no brazing, no refrigerant tools

WHAT’S INCLUDED — DIYM327HPW00D21

Outdoor Unit

• (1) MRCOOL® DIY® 27K 4-Zone Condenser
  Model: DIY-MULTI4-27HP230D-O 

Indoor Units

• (3) MRCOOL® 6K Wall-Mounted Air Handlers
  Model: DIY-06-HP-WMAH-230D25-O

Line Sets

• (3) MRCOOL® 25 ft DIY® QuickConnect® Line Sets w/ DIYPRO® Cable
  Model: DIY25-1438-O 

Accessories

• Wireless remotes
• Wall mounting hardware
• MRCOOL® Smart HVAC Controller® module
• Installation manuals

Smartphone not included.

❓ FAQ — Frequently Asked Questions 

Can each room have its own temperature?

Yes. Each zone operates independently through the MRCOOL® Smart HVAC Controller®.

Is this really a DIY system?

Yes. The DIY® QuickConnect® design eliminates vacuum pumps, gauges, brazing, and refrigerant handling.

Why are 25-ft line sets included?

They allow greater flexibility for condenser placement without compromising performance or warranty. You can always go longer or shorter. 

Is this system energy efficient?

Extremely. DC inverter technology and R-454B refrigerant significantly reduce energy consumption.

Why Buy From MRCOOL DIRECT?

When you order from MRCOOL Direct, you get:

• ✅ Authorized MRCOOL dealer – Your warranty is protected
• ✅ Factory-fresh units – No refurbished or mystery sources
• ✅ Fast U.S. shipping – Most in-stock items ship in 1–3 business days
• ✅ Financing options – Make high-efficiency comfort more affordable
• ✅ Real product support – Help with sizing, line set selection, and DIY questions
• ✅ No third-party marketplace middlemen – Just genuine MRCOOL systems from a trusted dealer

BUY DIRECT!

Feel Free to call us anytime. Family Friendly help just a dial away. We love talking HVAC
615-553-8118

Family owned & USAs #1 MRCOOL Authentication Dealer.