All types of technology - recips, scrolls, screws, rotaries, and the like - had a place in the AHR Expo choir. And manufacturers were careful to explain exactly how each approach worked, and where such approaches would work best. Another trend was a large number of exhibiting companies that deal in the aftermarket aspect of compressors.
ASI Aftermarket Specialties Inc. (www.aftermkt.com), for instance, featured new Matsushita unitary rotary compressor models for R-22 from 26,200 to 35,200 Btu at 60 Hz, 208/230 volts. They are said to be particularly effective in high ambient conditions and in conventional unitary applications.