Perfect for people with multiple chemical sensitivities and needs an air filter that doesn"t offgas * HEGA - High Efficiency Gas Absorption both carbon cloth gas trapping and HEPA particles filtration * HEGA lasts up to 30% longer than conventional carbon/zeolite filters and weighs 13 pounds less * Uses very little energy even on highest settings, 3 speed control switch, air flow 200 cfm * 5 year warranty on all parts and labor, replacement HEGA filter costs are low