Addison (www.addison-hvac.com) introduced its semi-custom packaged cooling systems PR-series, which is designed to be highly energy efficient in both operation and construction, and is compatible with many different load-size variations. Air-cooled air conditioner, air-source heat pump, water-source heat pump, and geothermal water-source heat pump units are available. It is said to be ideal for treatment of 100 percent outside air, with units being available with optional digital scroll compressors, hot refrigerant-gas reheat, and energy conservation wheels.
Advanced Cooling Technologies Inc. (www.1-act.com/hvac/index.php) showcased its energy recover Air-to-Air Controllable Heat Pipe Heat Exchanger (AAHX). The ACT-AAHX recovers energy from the conditioned exhaust airstream and transfers it to the supply airstream to reduce heating or cooling plant loads. The captured Btu can save thousands of dollars per year in heating and cooling costs, and payback is typically under eight months, said the company. The ACT-AAHX features an integrated pivot that allows the unit to shift from summer-favorable tilt to a winter-favorable tilt so that energy can be recovered year-round.