Deep drawn flange and unique rain shield keep water out. Factory-set adjustable thermostat (switches on at 100 degrees and off at 85 degrees). Adjustable humidistat settings are: minimum 80%, normal 42%, and maximum 20%. 8x8 aluminum screen attached for insect protection. 2000TH model equipped with thermostat/humidistat combo switch. 2000, 2000TH; WUI product information. 5 year limited warranty.