We have been serving the city of chattanooga and the north georgia region for over years! Or, you can use more sophisticated controls (like the. Once you have your new boiler installed, we strongly recommend ensuring you have an. Be the first to ask a question want gb points? just write a review! Nevertheless, besides the unit’s afue rating, there are other factors that can affect your boiler’s usage. Combi can you even still get traditional boilers?.