Taco’s now-expanded ECM, wet rotor Viridian line includes the VR3452 high-efficiency wet rotor variable speed circulator for chilled and hot water applications, offering up to 34 ft of shut-off head and 52 gpm flow.
B&K Precision launched its latest multi-range DC power supply, the model 9111, expanding its 9110 multi-range supply offering. With constant voltage (CV) and constant current (CC) modes, the 9111 automatically recalculates voltage and current limits for each setting to deliver any combination of its 60 V/8 A output range within 180 W. The new DC power supply is suitable for a wide variety of uses in electronics manufacturing, service and repair, and engineering labs.
A selection of Vari-Green® controls is available from Greenheck. The controls maximize the energy efficiency of ventilation systems in a variety of applications when used in conjunction with Greenheck’s Vari-Green motor.
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.