Variable Air Volume Systems

No Comments
This article provides background information and general information on variable air volume (VAV) systems, and discusses improvements in today's VAV systems.
Read More

Water Contamination and Removal in Ammonia Refrigeration Systems

No Comments
Water contamination in an industrial ammonia refrigeration system can reduce system efficiency. A new automatic purger is described that can restore efficiency, cut electrical costs, and save money.
Read More

Applying Fibrous Glass Duct Wrap

No Comments
This article addresses the specific uses, performance characteristics, fire safety, condensation control, and installation recommendations for fibrous glass duct wrap.
Read More

The Operative Bald Spot

No Comments
A bald head enables you to immediately sense the smallest changes in air temperature or radiant heat transfer. The combination of the two is what defines "operative temperature" and the comfort equation that drives the radiant industry.
Read More

Four Steps to Reduce HVAC Energy Cost

No Comments
Many building operators do not repair or replace VFDs when they fail since motors can easily keep running through a bypass contactor. Continued operation in this mode quickly becomes a very expensive way to operate a fan.
Read More

U.S. Navy Studies Oil-Free Compressor Technology

No Comments
An ongoing study evaluating the performance of a new oil-free refrigeration compressor technology in a U.S. Navy facility in San Diego is showing promising results.
Read More

Heat Transfer

No Comments
Here is a quick reference on heat transfer. The equations are designed for quick and easy application in the field. They're intended for the technician who needs to determine if a system or component is performing in the desired range of operation.
Read More

Blower Doors: The Next Most Important Contribution To HVAC

No Comments
The benefits of blower door testing are multifold, and the contractors that have adopted its use are employing it in a variety of creative, valuable ways to strengthen the bottom line and improve quality of service to their customers.
Read More

Current Fuel Cell Technology

No Comments
Today, fuel cells are being developed to power commercial buildings, homes, passenger vehicles, and even small devices such as laptop computers. This article describes basic fuel cell components, highlights current fuel cell types, and discusses the technology challenges.
Read More

How Sensor And Gauge Accuracy Impact Chiller Efficiency

No Comments
The adage "garbage in equals garbage out" holds especially true when determining chiller performance. If your sensors haven't been calibrated in the last year and are over three years old, the odds of them being inaccurate are almost 100 percent.
Read More



Image Galleries

2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.


NEWSMakers: Joseph Groh

Joseph Groh, an industry veteran boasting 35 years of HVAC experience, discusses the 2008 bicycle accident that cut his career tragically short, and how the Joseph S. Groh Foundation is his way of giving back to the construction trade. Posted on Aug. 22.

More Podcasts


NEWS 08-25-14 cover

2014 August 25

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Prohibiting HFCs

EPA is proposing a rule that would prohibit some HFCs in select refrigeration applications. Do you agree with this move?
View Results Poll Archive


2014 National Plumbing & HVAC Estimator

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

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con