Profile: Z-Flex U. S. Inc. produces venting systems for furnace, boilers, tankless water heaters, water heaters, oil heaters and fireplaces. Our products include marine hose, industrial ducting, air brake, coupling, HVAC pipe and chimney liners. Our plastic extruded hose and duct is used for chemical fume control, diesel exhaust and abrasive material handling. Our brands include Z-Flex™, Z-Vent™, Insul-Vent™ and Oil-Vent™.