Technical

Criteria For Refrigerant Selection

This article has been excerpted from a comprehensive white paper, "Refrigerants for Commercial Refrigeration Applications," issued by Copeland Corp., part of Emerson Climate Technologies. The article focuses on the criteria for refrigerant selection, including discussion of the transitional refrigerants (HCFCs), chlorine-free refrigerants (HFCs), and halogen-free refrigerants.
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Ladder Safety Tips

Ladders are such common everyday tools that many workers take them for granted. The two principal causes of ladder-related injuries are using the wrong ladder for the job and misusing or abusing climbing equipment.
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Filters And Air Contamination In A Building

A properly functioning air filter system provides cleaner and safer air to building occupants. It also makes the HVAC system operate more efficiently and extends equipment life. This article provides details on air filter systems.
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Thermal Energy Storage: Looking Back 15 Years

Thermal energy storage is an energy conservation tool as well as an environmentally friendly and economically attractive alternative to new electric generation capacity. The installation highlighted in this article provides more information about its benefits.
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Pressurization Of Closed Hydronic Systems

Most modern hydronic heating and/or cooling systems are closed systems that must be maintained at some minimum pressure. This would seem to be a simple concept, but it is surprising how often a lack of attention to the basics can cause all kinds of problems.
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Motor Tips: Overload And Speed Change

This article provides tips on how to tell when a motor is overloaded and what can be done with a new replacement direct-drive fan or blower motor when little or no speed change can be detected from one connection to the next.
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2015 HARDI Fly-In

Highlights from HARDI's Congressional Fly-In in Washington, D.C. Post date: May 28, 2015.

Podcasts

NEWSMakers: Kevin Conrad
Kevin Conrad, president, Kevin Conrad Heating and Cooling Inc., Nantucket, Massachusetts, breaks down working in the New England climate, the benefits of insulation foam, and more.


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2015 June 29

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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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