News
News
MRCOOL DIY Multi-Zone 2/3 Rule Explained: Configuration & Sizing Guide
What is the MRCOOL Multi-Zone 2/3 Rule? Learn why connected indoor capacity should be at least two-thirds of condenser capacity, how to calculate it for 18K through 55K DIY 5th Gen condensers, and what to check before building your system.
Read moreMRCOOL Multi-Zone Mini Split 2/3 Rule: Why Proper Indoor Unit Sizing Matters
Planning a MRCOOL DIY Multi-Zone mini split? Learn what the 2/3 Rule means, why proper indoor air handler sizing matters, and how following this guideline improves efficiency, refrigerant flow, compressor life, and comfort while helping you avoid costly installation mistakes.
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