Property of National Air Filtration Association Electronic Air Cleaners Presented by Jim Hedback, CAFS Hedback Quality Air Property of National Air Filtration Association

Electrostatic Precipitation Principle Positive & Negative Charges Property of National Air Filtration Association

Property of National Air Filtration Association Normal Voltages 4,000 to 12,000 volts Dependent on Design Parameters Property of National Air Filtration Association

Ionizing Section & Collecting Section Property of National Air Filtration Association

Property of National Air Filtration Association Capacity & Efficiency Low Pressure Drop High Velocity & Over Rated CFM = Lower Efficiency Property of National Air Filtration Association

Property of National Air Filtration Association

Electrostatic Precipitation Principle Cont’d Ozone Production Pre-filters, Post-filters & Carbon Filters Cell Cleaning Power Pack & Service Property of National Air Filtration Association

Property of National Air Filtration Association Media Air Cleaners Capacity – Dependent on application Efficiency – particle size of application Pre-filters, Post-filters, Carbon Filters Cleaning and service Property of National Air Filtration Association

Property of National Air Filtration Association Applications Electronic vs. Media Residential Commercial Industrial Property of National Air Filtration Association

Air Patterns and Air Movement Property of National Air Filtration Association

Ventilation and Energy Efficiency ASHRAE Standard 62-2001 “Recirculation with air cleaning systems is also an effective means for controlling contaminants when using the Indoor Air Quality procedures…The system shall be capable of providing indoor air quality equivalent to that obtained using outdoor air at a rate specified in Table 2.” Property of National Air Filtration Association

Property of National Air Filtration Association BOCA Mechanical Code “Eighty Five percent of the required ventilation air shall be permitted to be re-circulated when the air cleaning system is also equipped with effective absorption or filtering equipment so that the air supplied to the space is within the quality limitations.” Property of National Air Filtration Association