Many customers want high-efficiency products; others should consider it. And why not? Energy efficiency makes economic sense. Regularly tied to reducing emissions or green building, you don’t have to believe in global warming or going green to be an energy efficiency advocate. Energy efficiency saves money, keeping more dollars in the pockets of your customers.

Hot gas bypass is recommended when the load on an evaporator varies and operation of the air conditioning system is desired at lower than design conditions. This article covers standard (external) hot gas bypass.

This article outlines the considerations involved to properly select, apply, and control fans. Emphasis is placed upon matching the fan equipment to the requirements of the system from several different perspectives.

This article examines the use of air handling units for health care applications. Health care applications place special demands on air handling equipment. The article investigates a way to reduce air handler operating costs.

If you are like most in the HVAC industry, you are a hands-on person - you don‘t want to mess with a lot of theory, but just get in and get the job done. But a refrigeration system is different from most of our work.

The objective of optimized shaft alignment is to increase the operating life span of rotating machinery. To achieve this goal, components must be made to operate within their acceptable design limits.

When rooftop units first came on the scene three decades ago, they were a rather basic solution for controlling temperature in one-story commercial buildings. Fast forward and that has all changed.

Effective air filtration provides the primary defense for building occupants and HVAC equipment against pollutants generated within a building as well as pollutants from air drawn into a building from the HVAC system. That’s why selecting the right HVAC filter is so critical.

There is absolutely no known technique for finding a crack 100 percent of the time. However, using a combustion analyzer to test for cracks in a heat exchanger offers some distinct advantages.

Techs interested in becoming certified in carbon monoxide (CO) testing not only need an understanding of combustion, but also low-level CO poisoning and what CO alarms do and don’t do.