System Highlights
- Three Independent Zones: Control temperature in three rooms separately; each air handler runs on its own schedule and setpoint with flexible sizing for varied space requirements.
- Flexible Zone Configuration: One 6K zone, one 9K zone, and one 12K zone ensure optimal coverage in homes requiring precise control across mixed-capacity room sizes.
- Expandable Expansion: The robust 27K BTU condenser features a 4-zone expansion capability, providing headroom for future property growth and system scaling.
- True DIY Installation Workflow: Patented pre-charged Quick Connect® lines completely eliminate the need for vacuuming or professional HVAC assistance. Includes robust DIYPRO® cabling.
- Smart Ecosystem Control: Full out-of-the-box integration via Amazon Alexa, Google Assistant, and the dedicated SmartHVAC mobile app for detailed remote zone tuning.
Engineered for homeowners who require precise, mixed-capacity tonnage across three varied residential zones, offering maximum long-term expansion flexibility from a single centralized 27K condenser framework.
Technical Specifications
| Total Connected Capacity | 27,000 BTU (6K + 9K + 12K Wall-Mounted Handlers) |
|---|---|
| Condenser Model | DIY-MULTI4-27HP230D-O (4-Zone Capable) |
| SEER2 Rating | SEER2 21.8 |
| Electrical Interface Requirements | 208–230V, 1 Phase, 60 Hz |
| Refrigerant Type | R-454B (Pre-Charged) |
Zone Configuration & Performance Metrics
| Specification / Feature | Zone 1: 6K Wall-Mount | Zone 2: 9K Wall-Mount | Zone 3: 12K Wall-Mount |
|---|---|---|---|
| Cooling / Heating Output | 6,000 BTU | 9,000 BTU | 12,000 BTU |
| Lineset Interconnect Size | 1/4" Liquid • 3/8" Suction | 1/4" Liquid • 3/8" Suction | 1/4" Liquid • 3/8" Suction |
| Lineset Length Options | 16 ft, 25 ft, 35 ft, or 50 ft | 16 ft, 25 ft, 35 ft, or 50 ft | 16 ft, 25 ft, 35 ft, or 50 ft |
Advanced Engineering & Warranty
- Gold Fin® Corrosion Protection: Advanced clear-coat protective barrier shields the exterior condenser coil against extreme humidity and harsh coastal climates.
- DC Inverter Drive Architecture: The continuous variable-speed rotary inverter compressor scales its operating frequency down precisely to match ambient thermal loads, completely avoiding costly current draw spikes.
- Eco-Friendly R-454B Refrigerant: Uses next-generation refrigerant for better environmental impact and enhanced system efficiency.
- 7-Year Compressor Warranty: Commercial-grade structural factory backing ensuring the heart of your outdoor condenser system remains protected against manufacturing defects.
- 5-Year Parts Protection Framework: Comprehensive hardware replacement coverage across internal circuit boards and critical operational components.
Download the MRCOOL Brochure
Get the full official MRCOOL DIY 5th Generation Brochure PDF — specs, lineup, and details.
