The new Heatrae Sadia Megaflo Eco unvented cylinders are designed and manufactured to a very high quality using the latest manufacturing techniques. They boast numerous innovative features designed to ensure high levels of operating efficiency. The combination of its lightweight and very strong construction makes Megaflo eco easier to handle on site. Every unit is pressure tested in the factory to 15 bar - five times the normal operating pressure - making Megaflo eco suitable for all domestic applications and a wide range of commercial applications. Features include sophisticated Duplex stainless steel cylinder construction for maximum strength and corrosion resistance; CFC/HCFC-free injected foam encasing the entire system including the bosses and valves, for the best possible heat insulation; a floating baffle system to replace a conventional external expansion vessl - for quicker and simpler installation.