I have been using Paul Revere Revolutionary Service for years, and they are the only company I'd call whenever I need my furnaces serviced. They came out recently to address an odd noise I heard when my furnace came on, and while I had them here I had them do some regular maintenance work, as well. Everything went well and he was able to fix the issue. The tech who showed up had been here once before and he seems like a great guy. He was knowledgeable, efficient, clean and good about getting the job done. Suffice to say, I'll absolutely use them in the future for furnace maintenance.