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.

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.

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.

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.

Through the use of a fuel cell at Air Station Cape Cod, by utilizing the unit's recovered heat for domestic hot water use, the station gained a total net savings of almost $24,000 in operating expenses over the course of a year.

Many contracting companies are turning to scheduling and dispatch software and wireless technology to help them make their businesses more profitable. Here's an example of how one contractor made the move.

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.

Transitions are needed in almost every duct run to change the size or shape of the ductwork. This article explains how to lay out rectangular transitions.

Mold spores are encountered everywhere. When they find the right environment, they'll multiply to the point of affecting HVAC performance and possibly occupant health. But there is a cost- and energy-efficient way to eliminate mold growth in HVAC systems - ultraviolet (UV) germicidal lamps.

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.