Virtually a system in a box, the Potterton Powermax HE only requires the addition of radiators, radiator valves, pipework and a room thermostat since it combines a condensing system boiler with an unvented stainless steel hot water cylinder in a single space saving package.  Hot water performance is outstanding at up to 48 litres/min filling a bath in as little as five minutes and ready to deliver another one in around 15 minutes.  Fully factory assembled, inclusive of a 7 day electronic programmer, installation couldnt be simpler or quicker, with just seven connections to be made.