Many building operators do not repair or replace VFDs when they fail since motors can easily keep running through a bypass contactor. Continued operation in this mode quickly becomes a very expensive way to operate a fan.
After switching to flat-rate selling, a contractor finds that his techs are struggling with having to present a price before they start the work. Consultant Al Levi discusses the steps to flat-rate success.
An often-asked question regarding professional recruiting tactics is, "Are you stealing employees?" The answer is absolutely not. If someone is happy with their employer, they won't budge.
In this edition of the Btu Buddy series, a customer with a heat pump is seeing his auxiliary heat light stay on almost all the time. With Btu Buddy's help, Bob finds that a check valve in the refrigerant circuit is stuck open.
An ongoing study evaluating the performance of a new oil-free refrigeration compressor technology in a U.S. Navy facility in San Diego is showing promising results.
All employees responsible for answering the phone should have a basic approach that gets all the information needed. The best way to do that is to create phone scripts and practice them. Here consultant Al Levi provides his advice.
Here is a quick reference on heat transfer. The equations are designed for quick and easy application in the field. They're intended for the technician who needs to determine if a system or component is performing in the desired range of operation.
This article describes how to troubleshoot a compressor and the associated problems that can cause a system to fail prematurely. It discusses the proper methods of diagnosing and repairing system problems.
The benefits of blower door testing are multifold, and the contractors that have adopted its use are employing it in a variety of creative, valuable ways to strengthen the bottom line and improve quality of service to their customers.
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