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Feature Articles
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A Reverse Spin on Water Purity
Water purification continues to be an issue of importance, especially in the food service sector. Restaurants, bars, hotels/motels, and health care facilities are some of the most critical areas in need of high quality water.
by Peter Powell Comments (0)
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Air Curtains Save More Energy
A new research study shows that air curtains are significantly more energy efficient than vestibules and can save commercial-industrial building projects tens of thousands of dollars in construction costs as vestibule substitutes.
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 | Contractor Solves Efficiency Problem With Boiler-Based System
How do you replace an aging 1.8 million Btu boiler with a more efficient system, capable of reducing natural gas consumption by up to 60 percent? Not a problem if you have the expertise and know-how of someone like Bob Pietrangelo and his staff at K. E. Seifert Inc., Langhorne, Pa.
by John R. Hall Comments (0)
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EPA Says New R-22 Supplies to End in 2020
It looks like the spigot of new HCFC-22 will be totally shut off as of 2020. The so-called “service tail” of HCFCs from that date until 2030 apparently will not include the most widely used refrigerant in the HVACR sector. That was the perspective of Dave Godwin of the EPA, speaking at a recent conference.
by Peter Powell Comments (0)
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Electric-Field Refrigeration Studied
Refrigerators and other cooling devices may one day lose their compressors and coils of piping and become solid state, according to Penn State University researchers who are investigating electrically induced heat effects of some ferroelectric polymers.
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Ice Breaker: Evacuation Speed Up
Evacuating a refrigeration system can be a very time-consuming task. There are several factors that influence the speed of this process. A technician has no control over many of these factors, but there are some areas in which he can help speed up the process.
by Joe Marchese Comments (0)
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Lochinvar VIP Program Has Dual Purpose
Getting the word out to end-users via promotional and marketing materials is one sure-fire way to boost unit sales and retain customers. But it is also a way to retain contractors as well. That’s the dual purpose of the VIP Contractor Program, sponsored by Lochinvar.
by John R. Hall Comments (0)
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Money Talks: Campaign Season Mail Slows Ad Deliveries
With political campaigns going at full speed, mailboxes across the country are going to be stretched to the breaking point in the coming weeks with direct mail, promises, and pleas from elections national and local. This overstuffing could impact your company's direct mail if you’re not careful.
by Terry Nicholson Comments (0)
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 | Radiant Defends Homestead Against Winter
Tim and Wendy Brockish’s back-to-nature homestead had one key flaw. In Rexburg, Idaho, just to the west of the Rocky Mountains, Mother Nature takes off the kid gloves during the long winter season. Thanks to geothermal HVAC and radiant heat, the owners now look forward to each new winter season.
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 | The Professor: The Scroll Compressor
This is the second of three columns covering the scroll compressor. This article covers the scroll compressor’s advantages and the modulating scroll compressor. The third article will cover digital capacity control for scroll compressors and scroll compressor protection.
by John Tomczyk Comments (0)
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The Sizing of Nozzles
This article provides a brief discussion regarding the purpose of the distributor nozzle, and how critical proper nozzle sizing during a refrigerant conversion is to maintaining system overall performance and efficiency.
by Chris Pate Comments (0)
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