Aluminium are the most common materials for sheet metal ducts since they are least likely to harbour dan- gerous moulds or growths because they have non-porous surfaces. Ducts are conduits or passages used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. The needed air ows includesupply air, return air and exhaust air. Ducts commonly also deliver ventilation air as part of the supply air. 22G alumini- um ducting provide an ideal ducting solution and long life. HVAC ductwork and systems require external ther- mal insulation to keep air temperature and systems running as designed. Investing in a fully adapted external insulation solution also has numerous bene ts for project owners (reduced energy consumption), installers (lightweight and easy to handle) and occupants (improved comfort). Reduce the amount of heat (or cold) energy needed to maintain the air temperature as designed, while also preventing the formation of conden- sation. Signi cantly reduce the amount of noise transmitted through the ductwork and pipework in the HVAC system. To protect building users and occupants with our non-combustible insulation materials, with no contribution of toxic smoke or aming droplets. 13 & 19mm thick class ‘o’ nitrile rubber with aluminium foil is ideally preferred.