How often do you get paid to save money through improved system performance? Utilities have their own reasons for seeing you lower your bills, so don’t get started on that next retrofit until you’re sure your organization isn’t leaving money on the table.
Designers can typically choose either type from any major manufacturer. But what are the differences and consequences for a design? What type of space lends itself to one or the other, and what windows of opportunity for real efficiency gains do either provide? Knowing all the differences can make all the difference.
Appropriately enough, a good variable airflow design accommodates and refines a number of design variables. Particle monitoring strategies, minimum supply air calculation, HVAC sequencing, and space pressurization are just a few stops on the way to spotless performance.
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.