The NEWS reports on new products found by our editors at the recent AHR Expo in Chicago. Products are listed in alphabetical order within each category.

Contractors do not like to hear the word “callback.” They cost money and degrade a customer’s respect for and opinion of the service contractor. So how can a technician reduce the number of times he must revisit a repair? 

This is the first of a three-part series covering the importance of liquid subcooling in a refrigeration or air conditioning system.

No technology has been generating more attention in recent months than the use of R-744 (CO2) as a refrigerant. Here are some of the latest announcements from a variety of sources.

Honeywell has announced that a refrigerant it markets as Genetron 245fa is helping to produce energy-efficient electricity at an aquatic complex in Lausanne, Switzerland.

Uses of so-called natural refrigerants such as HCs, CO2, and ammonia are being advocated as ways to positively deal with issues of climate change, greenhouse effect, and global warming. That was the primary perspective of an extended report from Eurammon, a joint European initiative of companies, institutions, and individuals who advocate an increased use of natural refrigerants.

Safety is paramount when working with ammonia refrigerants. Why? If something does go wrong in such a situation, it can have grave consequences. Ammonia is a health risk because of its corrosiveness to skin, eyes, and lungs. In fact, exposure to 300 ppm creates an imminent danger to life and health.

The world of so-called natural refrigerants, particularly hydrocarbons (HCs), has gotten a lot more interesting recently. The U.S. Environmental Protection Agency (EPA) has given Significant New Alternatives Program (SNAP) approval to three HCs.

The Air-Conditioning, Heating, and Refrigeration Institute (AHRI) is moving forward with an ambitious project to identify low global warming potential (GWP) refrigerants. What does that mean?

Minimizing frost accumulations on refrigerator evaporator coils and fins, the Ice*Meister™ Model 9734-REFR optical defrost controller can be used in commercial walk-in refrigerators and reach-in refrigerated display cases, and other self-defrosting chiller systems in supermarkets, restaurants, school cafeterias, and more.