ICC INDUSTRIAL AND COMMERCIAL CHIMNEYS VIP+ PRESSURE VENTVIP+ is a modular, double wall chimney system designed to vent positive pressure appliances. Learn more CONDENSING VENTICC Condensing Vent (VIC) is a tested single wall, double wall, or insulated double wall vent system for condensing or near condensing appliances. Learn more DOCUMENT LIBRARYLooking for quick references and downloads?Go to downloads NEED ASSISTANCE?Let us help.ICC Industrial Technical Support