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  • Energy Efficiency Explained
  • What Is a Heat Pump? How It Works, Types, Costs & Benefits
  • Patented Quick Connect® Line Sets Explained
  • Ducted vs. Ductless HVAC Systems: Cost, Efficiency, Installation & Pros and Cons

COOL Guides

Take control of your comfort with our expert insights.

  • High-Efficiency Comfort for Homes Without Ductwork
  • How to Heat and Cool a Room Addition Without Extending Ductwork

Recent Blog Posts

Enhance your understanding of home comfort, and make decisions with confidence.

How MRCOOL® Billboards Became an Unexpected Learning Tool for a Child with Autism

How MRCOOL® Billboards Became an Unexpected Learning Tool for a Child with Autism

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How MRCOOL Changed the HVAC Industry

How MRCOOL Changed the HVAC Industry

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Women in HVAC Can Build the Future of Comfort

Women in HVAC Can Build the Future of Comfort

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What Does a Career in HVAC Look Like When You Don't Pick Up a Wrench?

What Does a Career in HVAC Look Like When You Don't Pick Up a Wrench?

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America Needs to Fill 40,000+ HVAC Job Openings a Year. MRCOOL Rethinks How to Fill Them

America Needs to Fill 40,000+ HVAC Job Openings a Year. MRCOOL Rethinks How to Fill Them

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Best Way to Heat and Cool Off-Grid: One Family’s DIY Install

Best Way to Heat and Cool Off-Grid: One Family’s DIY Install

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