Stretchduct is an uninsulated flex pipe made of durable aluminum completely without combustible materials. Stretchoduct is used in ventilation systems in industries, small houses and the like where a pliable and flexible hose is needed. The hose is approved for connection between the cooker hood/stove fan and the intake duct. The aluminum hose is made of a layer of profiled aluminum strip that is corrugated and folded together. The hose is delivered compressed and is approximately four times longer when extended. The hose is easily cut with a knife to the right length. When splicing, a nipple for the spiro system or a hose clamp can be used.