Notes that volatile organic compounds (VOCs) are commonly removed from indoor air by adsorption on fixed-bed activated carbon filters. Some of these filters have a short lifetime. States that by using a rotary configuration, a charcoal filter can be continually regenerated, extending its useful life and possibly allowing removal of a wider range of VOCs. Explores the potential of such a configuration through analysis of a rotary regenerative activated carbon wheel with infinite transfer coefficients. Discusses design considerations and performance limitations, including implications for temperature and humidity control.KEYWORDS: Organic compounds, air filters, activated carbon, rotary filters, models, calculating, indoor, air quality.Units: Dual