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Digital Edition

Check out the latest issue of RSES Journal for features including: How Humidity Affects Temperature Drop, Multiply Refrigeration Advantages with Multiplex System Design, Staying Frosty with A2L Refrigerants and more. All inside your May 2021 RSES Journal issue.



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IIAR 2021


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Preparación para el Examen NATE: Aire acondicionado y bombas de calor

Preparación para el Examen NATE: Aire acondicionado y bombas de calor



Society & Industry News

Staying Frosty with A2L Refrigerants

The world of refrigerants, as we know it, is changing once again. Regulatory drivers and increasing efficiency demands are helping to shape the course of our industry.

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How Humidity Affects Temperature Drop

When the humidity(water vapor) content of air entering a cooling coil is elevated, the temperature drop of air across that cooling coil is less than normal. When water vapor content of entering air is low, the temperature drop of air across the coil will be greater than normal.

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Pandemic Spurs Interest in Germicidal UV-C for Air Disinfection

Many refrigeration engineers may be familiar with the restorative abilities of Ultraviolet Germicidal Irradiation (UVGI or UV-C) energy to remove biological growth from cooling coils and return cooling capacities to original design specifications.

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Multiply Refrigeration Advantages with Multiplex System Design

Over the past several years, the drivers impacting the choice of refrigeration systems used in supermarket and restaurant applications have evolved significantly.

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RSES Past International President Krepcik Welcomes President Biden at TCC HVAC Workshop

President Biden and First Lady Jill Biden visited an HVAC workshop at Tidewater Community College (TCC) in Portsmouth, VA on May 3 as part of the administration’s efforts to gain support for the president’s American Jobs Plan and American Families Plan. Biden was cordially greeted by TCC’s HVACR Professor and Program Lead Harlan “Skip” Krepcik, CMS, MBA, RCT, who served as RSES’ International President for the 2015–2016 two-year term.

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RSES is the leading education, training and certification preparation organization for HVACR professionals. RSES publishes various comprehensive industry training and reference materials in addition to delivering superior educational programs designed to benefit HVACR professionals at every stage of their careers through instructor-led training courses, online training for HVAC, educational seminars, interactive CD and DVD products, industry-related reference manuals, and helpful technical content through Service Application Manual chapters, the RSES Journal, the RSES Journal archives and feature articles, as well as web-exclusive features.

Beginning with basic theory and extending to complex troubleshooting, training courses covering refrigeration and air conditioning, heating, electricity, controls, heat pumps and safety may be conducted in a classroom environment or though self study. RSES publications may be purchased by schools, contractors, manufacturers or any other industry group wanting to conduct comprehensive training programs. Seminars covering air conditioning troubleshooting, electrical troubleshooting, compressor training, condenser training, refrigerant piping practices, DDC controls, and more are held in various cities across North America.

Select training programs offer Continuing Education Units (CEUs) and NATE Continuing Education Hours (CEHs).

In addition, RSES offers industry certification preparation materials for refrigerant handling (EPA Section 608), R-410A and North American Technician Excellence (NATE) examinations.

RSES’ monthly magazine, RSES Journal, serves HVAC contractors, service technicians, students, operations/maintenance managers, engineers and technicians who work in the residential, light commercial, commercial and institutional markets on air conditioning, warm-air heating, refrigeration, ventilation, electrical, ice machines, chillers, hydronic heating, piping, refrigeration control and energy management, building automation, indoor air quality and duct cleaning, and sheet metal fabrication equipment and/or systems.
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