Bitzer says its new Ecoline reciprocating compressor series is now more versatile and available for use with R134a, R404A, R407A, R407C, R407F, and R507A. With the new series, the company claims it is transferring all the advantages of the Ecoline series for R134a refrigerant to an even broader range of applications.
Available in the 15- to 25-tonnage range, the new Trane® Foundation™ light-commercial rooftop units feature a dual-footprint design that can directly replace up to two-thirds of existing units without adaptor curbs.
Bitzer US has started production on its new Ecoline of reciprocating compressor. The company says the new series is transferring all the advantages of the proven Ecoline series for R134a refrigerant to an even broader range of applications in order to provide customers with added value.
Johnson Controls has released the York® Predator Ultra High Efficiency Packaged Unit. The company claims the combination of the unit’s two-stage compressor, variable-frequency drive , high-efficiency indoor/outdoor coil and premium-efficiency indoor/outdoor motor combine to deliver the highest AHRI-listed efficiencies in the industry and reduced energy use up to 18.1 SEER and 14.35 EER.
Mitsubishi Electric has updated its VRF WR2- and WY-Series Modular Water Source Units. Both the WR2- (heat recovery) and WY-Series (heat pump) are available in smaller and lighter units with plate type heat exchangers and both systems operate in either cooling or heating modes.
The Trane® Advantage VRF™ variable refrigerant system features variable-speed compressor technology and offers customizable solutions for temperature control and occupant comfort. The new systems from Trane adopt ‘smart inverter’ compressors and feature an upgraded vapor injection system, providing improved performance over previous versions.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.