How Was Refrigeration Discovered?

Modern refrigeration is a big deal, and it’s not a stretch to say it’s one of humanity’s greatest achievements. It prevents bacteria, yeast and mold, which extends the life of food items, medical specimens and chemicals. Refrigeration technology has improved food safety, expanded seasonal food production, fueled medical research, refined print production and powered industrial […]

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6 Reasons to Become an HVAC Technician

A lifelong career in heating, ventilation and air conditioning (HVAC) is waiting for you right now. We need more men and women to fill positions in the manufacturing and construction industries.  Why? The skilled labor shortage in the United States is hitting these industries hard. Not enough people are entering them to fill jobs in […]

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What Does a Heat Exchanger Do in an HVAC System?

Any HVAC technician worth their salt will tell you that HVAC equipment doesn’t create cold energy. Rather, it transfers thermal (heat) energy from one location to another. Heat flows from areas of high temperature to areas of low temperature, according to the Second Law of Thermodynamics. The HVAC system is responsible for reversing this natural […]

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What Is a Cooling Load?

The process of cooling doesn’t involve pumping cool air into a room—it’s all about removing the heat. When an HVAC technician installs an HVAC system into a building, they need to figure out how much cooling a building actually needs. This is call the cooling load. So what’s it all about? Let’s dive into how […]

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The Skilled Trades Advantage: Why Women Should Consider a Career in HVAC/R

During World War II, the message movies, newspapers, and good old Rosie the Riveter sent women was to do their part to help defeat the Axis powers by entering skilled positions in aircraft and munitions factories. Women did in unprecedented numbers. 1 Once the Allies won the war, many women traded in their tools for […]

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Where Are All the Welding Jobs? These States Have the Highest Employment

The energy industry is expanding, and our infrastructure is aging away. Welders are needed across the country now more than ever. 1 But the job market still varies from city to city, and you, welder, will find more opportunity in some cities versus others. Where you want to live and work is something you will […]

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What Is Stick Welding (SMAW) And Why Does It Matter?

One thing that every professional welder has in common: They all started off learning about stick welding. Stick welding is used in so many fields of the industry 1 —all the time, all over the world. If you want to weld, stick welding is the bedrock. So…what exactly is it? How Does Stick Welding Work? […]

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New DOE Efficiency Standards for Water Pumps

The Department of Energy (DOE) recently enacted new efficiency standards for the types of water pumps used to circulate cold and hot water in commercial HVAC systems. 1 But you’ve only started working toward your mechanical maintenance degree, so why should you care? The truth is, anyone who wants to work in mechanical maintenance needs […]

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What Is Evaporative Cooling?

Nearly half of residential energy costs are from HVAC units. Evaporative cooling can be less expensive to purchase and typically require less energy that other types of refrigeration. This technology has been commonly used in commercial settings like industrial kitchens, laundries, dry cleaners, greenhouses, loading docks, warehouses, factories, construction sites, workshops, and kennels. HVAC technician […]

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