MRCOOL DIY 5th Gen 36,000 BTU 5‑Zone Multi‑Zone Mini-Split Condenser DIYM236C00

MRCOOL DIY 5th Gen 36,000 BTU 5‑Zone Multi‑Zone Mini-Split Condenser DIYM236C00

The MRCOOL DIY 5th Gen 36,000 BTU 5‑Zone Multi‑Zone Mini-Split Condenser DIYM236C00 is a powerful outdoor heat pump unit designed to serve as the heart of a multi‑zone ductless HVAC system. Engineered for homeowners who want flexible, customizable comfort across multiple rooms, this outdoor condenser supports up to five indoor air handlers — allowing you to heat or cool an entire home, office, or large living space without professional installation.

Built around advanced inverter compressor technology, the system delivers strong year‑round performance with high efficiency. With a 36,000 BTU capacity and impressive efficiency ratings, this condenser provides reliable cooling in summer and effective heating in winter — helping you maintain comfort and manage energy costs. The unit operates quietly and efficiently thanks to its optimized design and next‑generation components.

Installation is straightforward thanks to the DIY‑ready design. The condenser is compatible with pre‑charged QuickConnect® line sets and uses eco‑friendly R‑454B refrigerant, eliminating the need for vacuum pumps or refrigerant handling. This allows homeowners with basic tools to connect indoor units and be up and running quickly.

Smart home connectivity is built into the platform, with support for app‑based controls and compatibility with popular voice assistant systems. Durability is enhanced by corrosion‑resistant outdoor construction and a robust warranty package, giving you peace of mind and long‑lasting performance.

Features

• Designed for multi‑zone ductless HVAC systems with up to five indoor units

• 36,000 BTU capacity for balanced heating and cooling performance

• Compatible with multiple indoor air handler combinations (e.g., 6K, 9K, 12K, 18K, 24K)

• True DIY installation with pre‑charged QuickConnect® line sets — no vacuum pump or refrigerant tools needed

• Uses R‑454B refrigerant (lower global warming potential)

• DC inverter compressor for efficient, smooth, and quiet performance

• SmartHVAC® app compatibility for remote control

• Works with smart assistants like Amazon Alexa and Google Assistant

• Corrosion‑resistant outdoor design for enhanced durability

• Industry‑leading warranty coverage for compressor and parts

Smart control features come standard across the line:

• Seamless integration with the SmartHVAC app (iOS and Android)

• Voice control compatibility with Amazon Alexa and Google Home

• The ability to set zone-specific schedules, modes, and temperature settings

• Real-time energy usage monitoring

With these advanced tools, you can customize your comfort with ease—from anywhere.

Specifications

The MRCOOL® 5th Gen DIY® Multi-Zone Series is backed by one of the best warranties in the industry:

• 7-year compressor warranty

• 5-year parts warranty

• Limited Lifetime Replacement Warranty when enrolled in the MRCOOL® Care Program

Whether you’re retrofitting a single floor or outfitting an entire house, MRCOOL® DIY® Multi-Zone systems offer the perfect blend of power, convenience, efficiency, and peace of mind—all in a package you can install yourself.

Compatible Air Handler Combinations (Max 39,000 BTU)

Connect 6K, 9K, 12K, 18K, or even 24K air handlers (not exceeding 39,000 BTU total). A minimum of 2 air handlers must be connected. Ideal total indoor load falls between 25,200 – 36,000 BTU (70%–100% of capacity), but you may connect up to 39K BTU total (108% diversity load).

Example combinations include:

• 18K + 12K + 9K = 39K
• 12K + 12K + 12K = 36K
• 9K + 9K + 9K + 9K = 36K
• 24K + 12K = 36K (3 ports unused)
• 18K + 9K + 6K + 6K = 39K

Recommended Wire Size

• Recommended: 10 AWG copper wire – supports 25A MCA and 30A max fuse
• One Size Smaller (12 AWG): Not advised – may exceed ampacity under load and fail local code
• One Size Larger (8 AWG): Beneficial for long wire runs, improving voltage stability and safety

Note: Total indoor unit BTU capacity must be calculated before installation. MRCOOL 5th Gen condensers are pre-charged with R-454B and are not compatible with previous R-410A systems. Always follow installation guidelines.