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News
MRCOOL DIY Multi-Zone Before You Buy Checklist | 5th Gen
Buying a MRCOOL DIY 5th Gen Multi-Zone system? Use this complete before-you-buy checklist to plan room loads, indoor units, condenser size, the 2/3 Rule, line-set sizes and lengths, communication wire, electrical requirements and accessories before ordering.
Read moreMRCOOL DIY 5th Gen Multi-Zone Sizing Guide: 18K vs 27K vs 36K vs 48K vs 55K
Not sure which MRCOOL DIY 5th Gen Multi-Zone system you need? Compare the 18K, 27K, 36K, 48K and 55K condensers, learn how to size individual rooms, understand MRCOOL’s 2/3 Rule, and find the correct R-454B Quick Connect line-set size and length—including how approved line-set extensions and MRCOOL Quick Couplers work.
Read moreMRCOOL 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.
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