RectorSeal has developed the SlimDuct RD-Series and the PD-Series, commercial rooftop ducting and support systems that are designed for multiple linesets as used with variable refrigerant flow and multi-split systems or any other conventional air-conditioning and refrigeration systems.
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.
Acuity Brands Inc. introduced its new LSXR Fixture-Mount Sensor from Sensor Switch®. This sensor offers up to four interchangeable lenses and an integrated, adjustable mounting bracket, making it ideal for both high-mount and low-mount lighting control applications.
CAS DataLoggers and T&D have product launched the new TR-71wf/72wf Series Wireless Temperature and Humidity Data Loggers. These two-channel environmental monitors have an auto-communication function which automatically uploads all recorded data from the loggers over wireless LAN to T&D’s free cloud service. Now users can view data anytime, anywhere on a mobile device or PC.
Danfoss Turbocor released its new TT350 for 380-volt 50Hz and 60Hz applications. Similar to the other TT series compressors, the TT350 380-volt 50Hz and 60Hz models are oil-free, variable-speed, magnetic bearing centrifugal compressors.
Mitsubishi Electric U.S. Cooling & Heating Division is now offering the CITY MULTI® VRF Dedicated Outdoor Air System. The system is designed to supply outdoor ventilation air to a building independent of the HVAC air distribution or conditioning system.
Armstrong Fluid Technology has launched a new control product developed to improve the energy efficiency of chiller plants. Interfacing with an existing building or chiller plant automation system, the Armstrong OPTI-VISOR™ controls the key components of a chiller plant, providing the optimal operating settings for equipment such as water-cooled variable speed chillers, variable flow cooling towers, and variable speed pumps on the chilled water and tower water circuits.
Why was one floor’s laboratory ventilation failing to keep up, when it was even the closest floor to the rooftop fans? Some system sleuthing led two engineers to a fitting conclusion. Read more stories in May Issue 2017.