Absorption technology has been around for much more than a century but, at least in the United States, using it for cooling (and heating) purposes has not been widely embraced. That's because for most of the country, electricity has been relatively cheap, and the first cost of gas-driven equipment is usually a more expensive option. With the recent electricity shortages in California, however, many are looking for alternative forms of cooling.
Manufacturers are starting to become more vocal about the benefits of their natural gas products, stating that building owners should consider whether or not electricity will be there for them when they need it. One of the natural gas-driven products touted is the combination chiller/heater unit, which is starting to make waves in this country. Indeed, more are becoming interested in having one piece of equipment provide both heating and cooling through the use of natural gas.