What is the eco-mode setting on a boiler? is it cheaper than the normal function? In most homes in the united kingdom (uk), you will typically find a heating system that employs a central boiler heating unit and a separate device for water heating. Sign up now to stay updated on the latest news and offers! If that doesn’t do the trick, try option two…. We have been serving the city of chattanooga and the north georgia region for over years! Because standard boilers can handle.