Featured Stories

The Professor’s Lesson on HFO, HC Refrigerants

Next-gen Fluids Each Offer Unique Traits, Characteristics

HFO refrigerants are actually unsaturated HFC refrigerants and are widely recognized as the next generation of refrigerants because of their environmental friendliness, cost-effectiveness, and great energy efficiencies.

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Ice Breaker: The Role of the Liquid Receiver

Storage Capacity Equal to 80 Percent of Internal Volume at 90°F Refrigerant Temp

A common accessory used on many refrigeration systems is the liquid receiver, a storage vessel designed to hold excess refrigerant not in circulation.

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For Comfort Systems USA, the ‘V’ in HVAC Stands for Veterans

Comfort Systems USA Finding Success in Employing Military Workers

While a shortage of competent HVAC technicians has plagued the industry for more than a decade, one national contractor has uncovered a very effective way to fill that void.

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Naturals Get New Push at Conferences

Atmosphere America Examines Regulatory Landscape, Cost Concerns

To continue to meet refrigeration needs, f-gas proponents are turning to low-global warming potential (GWP) HFCs and hydrofluoroolefins (HFOs) while advocates of so-called natural solutions — hydrocarbons (HCs), CO2, and ammonia — continue to build their cases.

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The Unified Group Brings Safety into Focus

Group Rebrands Annual Event as Construction Operations and Safety Forum

This year’s forum, held in September in Green Bay, Wisconsin, drew more than 40 members, making it the most attended forum in the event’s half-decade history.

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German Water: How Flow Rate Affects Heat Output

It’s OK to Design a System Outside of a 20°F Delta T

My objective is not to dissuade you from designing around 20° delta T at design load. It’s to assure you the sun will come up tomorrow if you happen to pick a different value.

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European Cooling Industry Prepares for HFO Future

Cuts to HFC Quota Drives Industry Toward Lower-GWP Alternatives

The European cooling industry needs to make plans to move quickly to lower-GWP refrigerants as the cuts in HFC quota envisaged by the F-Gas regulations will bite sooner than many people expect.

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VRF Gaining Acceptance in U.S. Marketplace

Value in VRF Found in the Equipment’s Benefits, Life Cycle Cost

The U.S. market was estimated to be worth $7.25 billion in 2012 and is expected to grow at a comound annual growth rate of 5.2 percent through 2019, according to a report by Transparency Market Research.

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HVACR Teachers Inspire Lifelong Success

Forbes, Compton, Wagner, Streacker Earn Best Instructor + Best Trainer Honors

These four men have worked tirelessly to not only become leaders in their fields, but to also share their knowledge and skills with others in order to help them succeed.

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Efficient, Practical VRF Installation Policies

Contractors, Manufacturers Recommend Reading, Following Equipment Manuals

If a system is not installed correctly, then it doesn’t work properly, and it will not reach its maximum energy-efficiency potential. VRF systems require the same level of care and quality work as ducted HVAC systems, maybe even slightly more.

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Image Galleries

2014 World Energy Engineering Congress

Scenes from the 2014 World Energy Engineering Congress in Washington, D.C.


NEWSMakers: Kari Arfstrom

Kari Arfstrom, executive director of the HVACR Workforce Development Foundation, talks about the upcoming HVACR & Mechanical Conference. Posted on Jan. 23.

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2015 January 19

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2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

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