Inner Duct Construction: 1 x PVCNominal Thickness of Inner Duct: 250 micronsTemperature range: -30°C / +80°CAir Velocity: 30m/s (max)Operating Pressure: 3000Pa (max)Fire Resistance: Fire Retardant We recommend that you connect the hose to the relevant spigot/outlet and fix in place using a metal hose clip.This flexible hose can be used as a part of a long ductwork run for a variety of purposes including whole-house ventilation, passive stack vent, air conditioning, positive pressure ventilators, HVAC, and Heat Recovery Systems. Weight: 3.0203329894 Pounds, Manufacturer: Kair