As automation reaches into nearly aspect of hvac, the application issues surrounding variable-frequency drives are evolving regularly. Learn about the new generation and how to harness the latest advantages.
By Timothy Coyle, P.E.
Discharge pressure and pump capacity are just two of several factors to be reckoned with in selecting condensate transfer and boiler feed equipment. This thorough walk-through is a helpful reference for future selection questions. By Garry Chelette
Providing just enough ventilation for the amount of people using a space at a given time? The concept's logic is appealing, but when it comes to conforming to Standard 62.1, the details may prove more vexing. By Joanna Turpin
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.