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

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

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

4. Ionizing Section & Collecting Section
Property of National Air Filtration Association

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

6. Property of National Air Filtration Association

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

8. 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

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

10. Air Patterns and Air Movement
Property of National Air Filtration Association

11. Ventilation and Energy Efficiency
ASHRAE Standard
“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

12. 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