Para Systems Inc. has released the Minuteman Entrust LCD Series of UPSs. The company says this new line of uninterruptible power supplies (UPSs) offers complete power protection designed to protect valuable equipment.
Extech Instruments has unveiled the new RD300, a heated diode refrigerant leak detector that pinpoints leaks of all CFC, HCFC, and HFC refrigerants with three levels of sensitivity to leaks as small as 0.25oz/yr (7g/yr). The ergonomic tool also features a built-in LED work light on the probe tip for dimly lit locations.
The new Ashcroft® DG25 digital pressure gauge provides a five full-digit LCD in ranges up to 25,000 psi. Available in accuracies of 0.5% and 0.25% FS, this new design boasts a minimum battery life of 2,000 hours.
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.