Articles by Joe Marchese

Ice Breaker: Think in Temperature, Not Pressure

Simply changing your focus can make a difficult task easier

Thinking in temperature in-stead of pressure can help make the crossover to a new refrigerant much easier. The next time you’re faced with determining the correct operating evaporator or condensing pressure, think in terms of temperature and then convert it to pressure.


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Ice Breaker: Using a Compressor Analyzer

A Valuable Tool to Prevent Unjustly Condemning Compresors

Too often, compressors get replaced when an external component, such as a defective start relay, start capacitor, or overload, is the true cause. A technician must always check these components before condemning the compressor.


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Ice Breaker: What is Superheat?

Defining Vapor Refrigerant Temperature and its Impact on System Performance

Measuring the evaporator’s superheat value is an important part of analyzing a system’s performance. If a lower-than-normal value is measured, too much refrigerant is entering the evaporator for the heat load. If a higher-than-normal value is measured, too little refrigerant is entering the evaporator for the heat load. 


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Ice Breaker: Correct Liquid Line Sizing

Accurate Assessment Vital for Proper Refrigeration System

Choosing the correct line size is very important to the overall success of the installation. Incorrectly sized refrigerant lines can lead to system problems, excessive energy consumption, and higher installation and operation costs.


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2015 HARDI Fly-In

Highlights from HARDI's Congressional Fly-In in Washington, D.C. Post date: May 28, 2015.

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NEWSMakers: Kevin Conrad
Kevin Conrad, president, Kevin Conrad Heating and Cooling Inc., Nantucket, Massachusetts, breaks down working in the New England climate, the benefits of insulation foam, and more.


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2015 National Plumbing & HVAC Estimator

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