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Technical

Online-only technical articles.

ARTICLES

Chimney Fundamentals: The Science of Venting Flue Gases - Part 1

How to Keep Your Customers Safe as Well as Comfortable

This multiple-part article series will discuss the basics, codes and standards, and the science behind chimneys. It will show how back drafting affects chimney performance, while explaining the principles of positive pressure. It will explain how to create and use positive pressure so chimneys will draft for safety and performance.


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On the Way to Safe and Secure Smart Homes and Buildings

Researchers Are Looking to Prevent Hacker Attacks

A growing number of household and building operations can be managed via the Internet. Today’s smart homes and smart buildings promise convenient, efficient building management. But often these systems are not secure. Scientists are working on a software product that defends against hacker attacks before they reach the building.


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Everything You Need to Know About BEMS

How to Keep a Building’s Energy Use Under Control

Thirty-nine percent of the total energy used in a building is wasted. But 84 percent of a building’s total energy consumption could be efficiently controlled through an effective building energy management system (BEMS).


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Dirty Sock Syndrome: What It Is, How to Prevent It

Applying a Solution That Works

In the 1970s, heat pumps were touted as the energy efficient HVAC systems of the future. New markets typically have new problems, and for heat pumps the nature of the problem related to odors. A particular foul smell was so prevalent that the moniker Dirty Sock Syndrome was coined and universally accepted.


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Biomass Boilers Offer a Cost-Effective Alternative, Says GSA

Testing Shows High Boiler Efficiency and Favorable Payback under Many Conditions

Advances in pellet combustion and control automation have recently positioned wood-pellet-fired biomass boilers as economical alternatives to traditional boilers. Their targeted use promises distinct benefits to the U.S. General Services Administration (GSA).


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Are Your Customers Being Overbilled for Energy?

Look at the Energy Data and Help Them Save

In every industry, companies are looking for ways to save on energy costs. This article provides a quick guide that examines several low-cost ways you can find energy savings for any facility. Among the savings areas, we’ll take a look at heating, lighting, electric motors, power factor correction, and more.


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Rise in Brownouts Creates Opportunity for HVAC Technicians

Study Shows Homeowners Understand the Risks, but Are Not Proactively Protecting Air Conditioners

Only two out of ten (22 percent) of United States homeowners protect their major appliances, including air conditioners, from brownouts and other power quality issues despite the fact that nearly nine in ten (87 percent) understand that a brownout can damage these same major appliances, according to a new study.


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H&H Event Showcases Products, Offers Seminars

A Forum for Customers and Manufacturers to Learn from Each Other

Mechanicsburg, Pennsylvania-based manufacturer’s rep firm, H&H Sales Associates Inc., recently held a “Customer Appreciation Day” product show and open house attended by hundreds of mechanical system installers and designers and consulting-specifying engineers.


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NREL Hosts Zero-Energy Home Competition

Students Presented Their Designs to Juries of National Experts

The campus of the U.S. Department of Energy’s (DOE’s) National Renewable Energy Laboratory (NREL) played host to 28 teams of university students and building industry experts who converged at the lab for the Challenge Home Student Design Competition.


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Water-Cooled Technology Cuts Costs

Also Provides Reduction in Peak Demand

This analysis shows how a water-cooled 500-ton chiller system when compared to a 500-ton air-cooled chiller system results in approximately $45,000 in annual operating costs savings. Additionally, the water-cooled system reduces peak energy demand by 45 percent.


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2014 SMACNA Annual Convention

Views from the 2014 SMACNA Annual Convention in San Antonio.

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NEWSMakers: Chris Mathis

Chris Mathis, president of Mathis Consulting Co. and vice chair of ASHRAE’s residential ad hoc committee, talks about ASHRAE’s exploration into the residential market. Posted on Oct. 17.

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