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  • Why (and When) Do We Need Defrost?

    Why Defrost? Let's start with the basics and move on from there. Defrost is necessary when the coil temperature drops below 32°F. Defrost can be as simple as turning the compressor off for a period of time or as elaborate as reversing the flow of […]

  • Charles’s Law

    Jacques Charles was a French physicist (and a real looker based on that photo) born in 1746. Little is known about his educational and family background, but he began his career as a clerk at the Ministry of Finance in Paris. After a short time as a […]

  • Don’t Fall for Unsafe Practices: Heights in HVAC

    DISCLAIMER: HVAC School is NOT an official OSHA safety training resource! Although we provide safety tips in good faith, our website is not a substitute for safety training from an authorized OSHA training source.   Many things may deter people […]

  • HVAC Supplies Shipped to All Your Sites

    Amazon · Sponsored — The evolution of online purchasing has allowed for a single source for all business and HVAC supplies, including staggered shipping to multiple sites and analytics on purchases. Amazon Business supports rapid turnaround on all […]

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