This Gledhill Slimline hot water cylinder has been developed to maximise the lower temperatures available from the heat pump. This unvented stainless steel unit is manufactured specifically for heat pump applications for providing mains pressure domestic hot water. This water heater is a totally new technology in water cylinders . It consists of a multi-pass corrugated stainless steel tube in parallel to reduce the pressure loss whilst maximising the heat exchange. Many medium to large heat pumps need heat exchangers in the store that will cope with the higher flow rates associated with primary temperatures typically 50 or 60 degrees celsius. All the usual features of the Gledhill StainlessLite Plus are maintained together with all the necessary controls and expansion devices included. To prevent the growth of legionella, the StainlessLite Plus HP model is supplied with an immersion heater tapping and a thermostat pocket . It is recommended that a thermostat is fitted with the