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When the new compressors at the expo are identified as scrolls, semi-hermetics, discus, screws, recips, and rotary, you realize that variety remains the theme of the sector. But the latest generations of those technologies have more emphasis than ever before on digital and variable-capacity options.

Nearly all new IAQ products shown at the 2007 AHR Expo featured some kind of sophisticated controls, even the residential models. The proliferation of products intended to save energy while improving air quality was pretty obvious, and controls certainly can contribute to both those objectives.

Commercial cooling encompasses a wide variety of products. Air curtains, cooling towers, and evaporative coolers are just a few of the items that help keep occupants in commercial buildings comfortable. These types of equipment and more were located throughout the 2007 AHR Expo.

High humidity can be a leading cause of building discomfort. Of course, manufacturers of new humidifiers, dehumidifiers, and dehumidification/humidity control products were more than happy to point out this fact to attendees at the 2007 AHR Expo.

Energy efficiency and quieter operation were definitely common threads of the new unitary products, which were revealed at the 2007 AHR Expo.

Several zoning product and system manufacturers introduced or featured new innovations to their product offerings at this year's AHR Expo.

Less noise and higher energy efficiency were definitely the buzz terms used by ventilation product manufacturers at the 2007 International Air-Conditioning, Heating, Refrigerating Exposition (AHR Expo).

Sensors and controls, which have continued to flood the HVACR market, will only have a stronger role to play in the industry, according to various manufacturers attending the 2007 Air-Conditioning, Heating, Refrigerating Exposition as well as past president of the American Society of Heating, Refrigerating, and Air-Conditioning Engineers.

When it comes to monitors and test instruments, it is rather amazing to see the vast improvements recorded in almost every phase of instrumentation over the past few years. Nowhere is it more pronounced and eye opening than at the annual AHR Expo.

Behind every good HVAC system is a very good support system. Not designed to be seen or heard, but these products play an important and integral part of the total HVAC system. The list includes drives and motors, which were on display at the expo.