Megaflo Eco unvented cylinders are your first choice for conserving energy while providing superior hot water performance. With a lifetime guarantee* for total peace of mind and made in the UK from high quality duplex stainless steel, Megaflo Eco is unrivalled in delivering high power showering and fast filling baths, even at low pressures. Featuring our internal expansion system and complete with a long life back up immersion heater, installation is quicker and easier too.*In domestic installations