We had a new boiler installed about 3 or 4 years ago. Since then we have had mold problems and the walls around the chimney in our upstairs bathroom become wet when we use the heat. We think they didn't vent it properly or there is no liner in the brick chimney. Is there a way to release the condensation directly from the boiler? Also, we find no drain pipe as I have read about. Is there an easy solution to this? Should we vent it out a basement window?