The new SIL 3 capable Ashcroft® A-Series miniature pressure switch is now available in an explosion- proof configuration for hazardous areas. With 316 stainless steel construction, an IP67 rated enclosure, and an operating temperature range from -40°F to 192°F, the rugged dual-seal rated A-Series explosion-proof pressure switch stands up to the most extreme environmental conditions.
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.