Upgrading to a high-efficiency a-rated condensing boiler & heating controls. Serving bristol, southington, avon, manchester, hamden and the rest of connecticut! See all articles by accuserv author james memije you’re going to learn a lot from what this contributor has to say. What are your experiences of installing a new boiler? how much did you manage to save? let us know! Awesome work! alex came in professional, knew immediately what to do fixed it and boom, done and out. Is drain out bathroom.