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May 2020
Advantages of Water-Source Heat Pumps in Commercial HVAC Systems
HVAC accounts for approximately 35% of the electricity used in a commercial building. For many cities, buildings are responsible for the majority of greenhouse gas (GHG) emissions.
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May 2020
Leading Off: COVID-19: The Obvious and Obscure
First, let me say the opinions that I express here are mine. I am not a virologist or an epidemiologist. If you want to know more about COVID-19 and HVACR practices, there is a wealth of information available. Two speci?c documents I like are REHVA COVID-19 guidance document, March 17, 2020, and ASHRAE Position on Airborne Infectious Diseases.
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Apr 2020
Last Word: Starting New with a Career
In many conversations with new tradesmen in the ?eld, I’ve come to learn the challenges they see being new to the industry. Employers hire new personnel with a particular need in mind. The problem is they typically fail to promote those employees and discouraged employees leave the trade outright.
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Apr 2020
AHR: More Than Just the Show
This year’s AHR Expo was a full circle learning experience for me as I learned new things before the show, during the show, and after the show.
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Apr 2020
Heating Up: Dealing with COVID-19
While I am writing this, the U.S. and the rest of the world are consumed with dealing with the fallout from the Coronavirus or COVID-19. This is mindboggling. The number of con? rmed cases in Illinois has increased by 50% in a single day.
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Apr 2020
The Rise of R-290 in U.S. Commercial Retail Refrigeration
With the ever-increasing popularity of commercial refrigeration in the early to mid-20th century, chlorinated refrigerants emerged as king of the realm, evolving from the introduction of R-12 in the 1930s through the development of R-22 and R-502 in the 1960s.
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Apr 2020
AHR Expo 2020: What Comes Next
If you want to get a handle on what’s coming next in the world of HVACR there is no better place to do it than the AHR Expo. Though trends come in waves over the span of years the industry moves ever forward by embracing new technology and ideas.
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Apr 2020
Maintaining and Troubleshooting VRF Systems
When you service and troubleshoot variable refrigerant fl ow (VRF) systems, you’re onsite to ensure the equipment consistently gives your customer the best comfort and performance possible.
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Apr 2020
Springtime Coil Cleaning
HVACR coil cleaning has never been an exact science. Service contractors many times rely on intuition and experience to determine what type of coil cleaner, applicator and dosage to use. Unlike more defined tasks, such as compressor liquid and suction line pressure procedures outlined in equipment manuals, coil cleaning is not a cut-and-dry process.
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Apr 2020
Troubleshooting: No Cooling Call
In this troubleshooting situation, you arrive at a residential cooling service call. The customer complaint is a no cooling on a two-year-old, 3-ton straight cooling, R-410A split system.
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