The Trion Console 250 Electronic Air Cleaner is a portable room air cleaner. It is ROUGHLY 2 feet tall and 14 inches square. This unit contains a prefilter, collector cell and charcoal after filter. Maintenance on the Trion Console 250 Electronic Air Cleaner consists of washing out the collector cell and prefilter on a monthly basis and replacing the charcoal filter every 3 months. The charcoal filter must be replaced more often if you have a heavy smoker in the space.