Technical

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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Minimizing System Effect

System effect is the negative impact on fan performance that results when the fan is connected to a duct system. This article explains system effect, what causes it, and how to overcome it.
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Multimedia

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2015 HARDI Fly-In

Highlights from HARDI's Congressional Fly-In in Washington, D.C.

Podcasts

NEWSMakers: Clint Schreck

Clint Schreck, general manager, Columbus Worthington Air, Columbus, Ohio, discusses winning Angie’s List Super Service Award, how to handle online reviews, and much more.

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2015 June 1

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HYDROCARBON REFRIGERANTS

The EPA has approved several hydrocarbon (HC) refrigerants for HVACR applications. Do you support the use of HCs?
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HVACR INDUSTRY STORE

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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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