Dehumidification Issues of Standard 62-1989

Maintains that HVAC equipment manufacturers, specifiers and end users are only beginning to address the series of issues promulgated by the increased outside air requirements in ANSI/ASHRAE Standard 62-1989: Ventilation for Acceptable Indoor Air Quality, including providing ventilation air treatment while maintaining control of indoor relative humidity. States a variety of outside air preconditioning equipment options are being promoted by HVAC equipment manufacturers to address this challenge. Discusses the individual issues involved, illustrates a simple methodology for identifying building types susceptible to humidity control problems and highlights detailed procedures for evaluating dehumidification capabilities of preconditioning equipment solutions.