Unvented Cylinder Installation, Servicing and Repair.

There is a new boiler that makes unvented cylinders almost a thing of the past. Get all the advantages of a system boiler and unvented cylinder with all the advantages of a combi boiler. 

The game-changing NCB700 ON combi gas boiler from Navien is the first product of its type capable of delivering hot water to three bathrooms simultaneously. Shattering all preconceptions of a combi boiler’s suitability for large properties, the NCB700 ON cleverly maximises recirculation of domestic hot water (DHW) to significantly reduce water wastage and offer flow rates up to an industry-leading 22 litres per minute (at 35°C temperature rise).