The Ultimate3 is Glow-worm’s high performance, ErP A rated boiler range developed for the one off installer market, and exclusively manufactured for City Plumbing Supplies. The Ultimate 3 combi offers both high DHW flow rates and flexible flue options. The high performance model also features a modulating Grundfos pump for reduced energy use, a manual pressure gauge for easy installation and a modern, bright, LCD display with a simple-to-use interface. Designed using an automotive grade, aluminium heat exchanger, the Ultimate 3 offers proven reliability and performance whilst being light to install and also easy to maintain. This must have boiler is also covered by a 2 year guarantee against any manufacturing defects. This Boiler Pack also includes a horizontal flue and a Climapro2 Control.