At the International Air-Conditioning, Heating, Refrigerating Exposition (AHR Expo), Lennox Industries Inc. (Carrollton, TX) announced some significant new enhancements to its L Series® line of commercial packaged rooftop units, including improvements in efficiency and dehumidification.
The recent National Hvacr Systems Security Summit, hosted by The News and the Air Conditioning Contractors of America (ACCA), brought together a panel of experts in the fields of indoor air quality and building security (“Examining Building Security,” The News, Feb. 4). It came to almost no one’s surprise that one speaker garnered as much attention as any hvacr industry representative — attorney Tom Jackson.
The main reason why most condenser coils are coated is that they’re located in a harsh environment. These environments can be natural (saltwater) or manufactured (chemicals), but in either case, a coating will lead to increased unit longevity, maintained performance, and efficiency.
Bob Forty knows all about condensing coils. As president of Energy Services Air Conditioning and Heating Co., and a 30-year self-proclaimed student of the hvac industry, Forty has seen a lot of trends come and go. One of the trends he’s not happy about at all is condensing coils that are made from aluminum (aluminum tube/aluminum fin).
Ductless systems have been popular in Europe and much of Asia for many years, and they’re gaining popularity in the U.S. However, there are still some who believe ductless systems can be used for cooling-only applications. Or, they should only be used in retrofit situations where it’s not possible to install ductwork. But the world of ductless is being shaken up.
If you want to know, you have to test. The professional hvacr service technician/installer uses electrical test instruments (ETIs) to diagnose, test, and measure equipment performance, controls, circuitry, and wiring.
In my previous article, I talked about the necessity of doing a complete inspection when running sales and service calls. One of the benefits of doing the complete inspection is that you normally discover additional needs and problems and, consequently, additional tasks to recommend.
At the 2002 International Air-Conditioning, Heating, Refrigerating Exposition, the Unitary Products Group of York International (Norman, OK) announced it is joining forces with Texas Instruments Sensors & Controls Group (Attleboro, MA) and Notifact Corp. (Fairfield, NJ) to give contractors what it believes to be a cost-effective and easy-to-use equipment monitoring and communications system.