HVAC

Figure 2: Multiple rows of bipolar ionization bars, supported on the upstream face of a cooling coil, in a large capacity air handling unit. Courtesy: CDM Smith

Five disinfection strategies and technology options for AHUs

Figure 5: Piping manifold secondary distribution piping to geothermal bore field. Courtesy: CDM Smith

Case study: How one city is using energy-efficient geothermal systems

Figure 1: An example of a supply fan array with backdraft dampers. Courtesy: Smith Seckman Reid, Inc.

AHU design from an owner and operator’s perspective

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Ep. 46 Putting the new A2L refrigerants into practice for HVAC

Figure 4: In addition to changing the compliance process in ASHRAE 90.4 from 2016 to 2022, the mechanical load component (MLC) values are more stringent across all climate zones. ASHRAE acknowledged that the MLC values in the 2016 edition needed to be lowered to ensure reasonable energy efficiency. Courtesy: Bill Kosik, WSP

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