One of the highlights of the annual ACCA Conference & Indoor Air Expo has come to be the “I’ve Got an Idea!” session. The event this year was transformed into “I’ve Got a BIG Idea!”
With the ability to control humidity, increase the comfort level in the home, improve IAQ, and lower energy costs, a variety of two-stage and variable-speed products are leading manufacturers’ development focus.
Are consumers beating down HVAC contractors’ doors with all kinds of questions about variable speed? And are HVAC contractors equipped to supply the necessary information if asked?
Performing jobs on the side is a common practice for workers seeking to earn extra income. If side jobs don’t infringe on an employee’s regular job duties or harm the employer he or she works for there should be nothing wrong with performing them, right? But should side jobs be encouraged? Therein lies the rub for some people.
Today, the challenge facing system designers and engineers is to minimize damage to ac motors from shaft current. A VFD induces destructive voltages that build up on the motor shaft until they find discharge paths to the frame.
A manager for a Wisconsin-based MRI manufacturer stated that electrical harmonics are “the No. 1 problem” faced in equipment performance. Clearly harmonics can’t be ignored as the electrical engineer’s problem.
The air filter protects the evaporator from dirt and lint. This article will explore how a dirty air filter can restrict airflow over the evaporator and cause very serious and expensive system problems.
A suction-line accumulator is a safety device used on a refrigeration system to prevent liquid refrigerant from returning to the compressor. Liquid refrigerant returning to a compressor can lead to several problems. One of these problems is bearing washout.
Yellow Page (YP) advertising forms the heart of many HVAC contractors’ marketing efforts. That makes it especially important that YP ads carry their own weight. For some, that’s becoming an increasingly troublesome question.
In contracting, it’s usually easiest to reach your goals by walking quietly. The following true story illustrates my point. The names have been changed to protect the barkers.
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